203 858 0080 naas@mac.com

Which Drain for a flat roof is best? watch Video

There are three types of draining systems found for flat roofs

Watch the other articles on drains and scuppers

When installing a new roof, it is important to re-design the drains so they would function better. Although drains are the most important part of a flat roof, it is the most overlooked object.

A well-designed drain system  ensures a long-lasting roof with low maintenance

Which Drain for a flat roof is best? watch Video

Which Drain to use for a flat roof
There are three types of draining systems found for flat roofs Watch the other articles on drains and scuppers When installing a new roof, it is important to re-design the drains so they would function better. Although drains are the most ...
See Articles

Roof Drains

Flat roof - lower edge to drain water off
Roof Drains Roof Drains are one of the most problematic areas on a roof. The positioning, design, and installation of a drainage system are one of the most important factors to have a relatively low maintenance roof. The average flat roof does ...
See Articles

Copper Drain-Making a drain for a flat roof. Avoid Plastic drains

Making a Copper Drain
Plastic Drains are not fit for a roof How to make a copper drain. When you see a plastic drain on a roof, you need to consider replacing it. Plastic and rubber roofs don’t go well together. Best practices for ...
See Articles

Scupper on Flat Roof Repairs – Effective Drain – Westport

Flat Roof Scupper - Westport. Lower the edge of a roof to remove water from a flat roof.
Scuppers are effective drainage systems - Check out our Drain section of roof drains Scuppers are the most efficient means of removing water from flat roofs - living in Fairfield County, Westport, Greenwich, and Stamford, we get our fair share ...
See Articles

Scuppers – Flat Roof Repair

Scuppers - Flat Roof Repair
Scuppers for flat roofs Scuppers flat roof repair - The cause of a major leak was due to incorrect leader headers on the other side of the wall. Scuppers are perfect for getting water off a roof, but if water ...
See Articles

Flat Roof Pooling Water – Video on installing channel to remove standing water

Standing water on a flat roof
Pooling water on a Flat Roof When you have a flat roof water pool for extended periods of time, it could have negative results to the membrane and structure. These areas that pool also accumulates dirt and leaves that accelerate ...
See Articles

Drains, Scuppers and Gutters – the pro’s and cons

Flat Roof Drain System - Flat Roof Repairs - Massachusetts
The pro's and cons of DrainsScuppers and Gutters. Drains Cons
  • Debris collects through the strainer and blocks the flow of water very easily.
  • Unclogging a blocked drain needs professional people to do it.- costly
  • The roof needs to be cleared of ...
    See Articles

Flat Roof Drains: Commercial Installation and Drainage – Watch Video

Installing a retrofit drain on a commercial roof
Commercial Flat Roof Drains: Installation Position is Critical Drains are an essential part of any commercial flat roof; however, it is critical to position them at the lowest point of a roof. When not appropriately placed, water will pool, causing load-bearing ...
See Articles

Scuppers – A Flat Roof Drain System for Commercial Roofs – Watch video

Flat roof - lower edge to drain water off
What is a Scupper? Scuppers are drain openings, placed through walls, that drain heavy water flow and debris away from commercial flat roofs. Installing a Scupper on an EPDM Flat Roof Watch the video below.  We are cutting away the edge ...
See Articles

Gutters on Flat Roofs – Important Drainage Systems

Gutter for flat roofs
Flat Roof Debris and Gutter Drainage Flat roofs collect an abundance of debris that can't be removed daily. During rainstorms, this debris gets washed into the gutter trough and clogs it, preventing proper drainage. Over time debris accumulates in the ...
See Articles

Flat Roof Drains and Strainers on Commercial Roofs – Watch Video

Drain Strainers on Flat Roofs
Flat Roof Drains and Strainers on Commercial Roofs Flat roof drains and strainers are the most important components of any commercial flat roof. They are responsible for properly draining any and all accumulated precipitation. To preserve the life of the roof, ...
See Articles

Flat Roof Drains: Location, Installation & Maintenance – Watch Video

Removing standing water on a flat roof/ Improving drain system
Flat Roof Drains: Location, Installation & Maintenance Flat roof drains require the proper location, installation, and maintenance because, as a system, it is fundamental to the preservation of a building's structure. We have seen many times that the location of a ...
See Articles

Flat Roof Drain Strainers – Watch Video

flat roof drain system
Flat Roof Drain Strainers are Important  If appropriately designed, a strainer is supposed to keep larger objects from going down a drain, while allowing smaller debris through with the water flow. Most strainers, or domes, that cover a drain on flat ...
See Articles

Best Flat Roof Drain System

Perfect drain system - less maintenance and less problems
A Flat Roof Drain - 15 years of performance A pleasant surprise about a flat roof drain on a commercial roof we installed more than 15 decades ago. After so many years I am still amazed how well it performs. The owner never ...
See Articles

Scuppers and Drains on Flat Roofs-Wilton, Darien to Greenwich

Scupper on an EPDM Rubber Roof - Flat Roof Repair - New Hampshire
Scuppers on flat roofs are best if correctly placed Scuppers are drain outlets on the edge of a roof. Our service is from Westport, Darien, Stamford, Greenwich, New Canaan, Ridgefield, Wilton, and Redding. A scupper drain outlet can be just a ...
See Articles

Gutter Repairs/ leaks on flat roofs? Stamford Westport CT

Gutter Iced Up during winter - Connecticut - Flat Roof Repair
Gutters constantly have to be cleaned out and re-adjusted Gutters repair is the often overlooked Whether residential or commercial roofs, whether slanted or pitched roofs, they all need gutter repairs. The best draining system is to have a slightly slanted ...
See Articles

Flat Roof Drains. Which is the best drain configuration? – video

Flat Roof drain
 Flat Roof Drains. Which is the best drain configuration? - video Placing or positioning flat roof drains in the right place is essential. Drains connect to pipes below the ceiling that will remove the water away from the building and ...
See Articles

Roof Drains

Roof Drains

Roof Drains are one of the most problematic areas on a roof. The positioning, design, and installation of a drainage system are one of the most important factors to have a relatively low maintenance roof. The average flat roof does not have an optimized draining system. Most of the time there is not a positive pitch to let water drain, and that causes ponding. Every roof is unique, and the drainage system should be customized for each roof.

Things to consider when designing a Roof drains system.

Step 1: Calculate total roof area

The easiest method is to multiply the roofs surface length by width. Example:  A 30 ft. x 50 ft. = 1500 sq. ft. area.

Do not subtract other surface areas from the roof size. It is not necessary to be accurate. If there is another roof that leads onto the roof you calculating the size of, then you need to calculate that roof’s size as well. What you want to accomplish is to calculate the catchment area surface of all the roofs that uses a common drain together.

Step 2: Find the Rainfall rate for your area.

International Code Council list the rainfall rates for larger cities in all 50 states. Use this as a reference. Using an average rainfall rate is efficient. Again what we trying to do is calculate the volume of water that will accumulate from all the roof surface surrounding that particular drain in one hour.

Step 3: Calculating the drain size

Drain sizes are from 2″ up to 8″ pipes. Most commonly 3″ and 4″ drains are used.

 

Here is a chart that can help with the calculation of size drains that will be needed per square foot area.

average rainfall table calculator
DIY Flat Roof Repair Videos and Instructions - determine type of flat roof

DIY Flat Roof Repair Videos and Instructions

Before making a Flat Roof Repair, determine what type of roof you have

Help me with Google - please!

Click the 5 Stars at the top. If you have time write a comment at the bottom - Thanks

Which Drain for a flat roof is best? watch Video

Which Drain to use for a flat roof
There are three types of draining systems found for flat roofs Watch the other articles on drains and scuppers When installing a new roof, it is important to re-design the drains so they would function better. Although drains are the most ...
See Articles

Roof Drains

Flat roof - lower edge to drain water off
Roof Drains Roof Drains are one of the most problematic areas on a roof. The positioning, design, and installation of a drainage system are one of the most important factors to have a relatively low maintenance roof. The average flat roof does ...
See Articles

Copper Drain-Making a drain for a flat roof. Avoid Plastic drains

Making a Copper Drain
Plastic Drains are not fit for a roof How to make a copper drain. When you see a plastic drain on a roof, you need to consider replacing it. Plastic and rubber roofs don’t go well together. Best practices for ...
See Articles

Scupper on Flat Roof Repairs – Effective Drain – Westport

Flat Roof Scupper - Westport. Lower the edge of a roof to remove water from a flat roof.
Scuppers are effective drainage systems - Check out our Drain section of roof drains Scuppers are the most efficient means of removing water from flat roofs - living in Fairfield County, Westport, Greenwich, and Stamford, we get our fair share ...
See Articles

Scuppers – Flat Roof Repair

Scuppers - Flat Roof Repair
Scuppers for flat roofs Scuppers flat roof repair - The cause of a major leak was due to incorrect leader headers on the other side of the wall. Scuppers are perfect for getting water off a roof, but if water ...
See Articles

Flat Roof Pooling Water – Video on installing channel to remove standing water

Standing water on a flat roof
Pooling water on a Flat Roof When you have a flat roof water pool for extended periods of time, it could have negative results to the membrane and structure. These areas that pool also accumulates dirt and leaves that accelerate ...
See Articles

Drains, Scuppers and Gutters – the pro’s and cons

Flat Roof Drain System - Flat Roof Repairs - Massachusetts
The pro's and cons of DrainsScuppers and Gutters. Drains Cons
  • Debris collects through the strainer and blocks the flow of water very easily.
  • Unclogging a blocked drain needs professional people to do it.- costly
  • The roof needs to be cleared of ...
    See Articles

Flat Roof Drains: Commercial Installation and Drainage – Watch Video

Installing a retrofit drain on a commercial roof
Commercial Flat Roof Drains: Installation Position is Critical Drains are an essential part of any commercial flat roof; however, it is critical to position them at the lowest point of a roof. When not appropriately placed, water will pool, causing load-bearing ...
See Articles

Scuppers – A Flat Roof Drain System for Commercial Roofs – Watch video

Flat roof - lower edge to drain water off
What is a Scupper? Scuppers are drain openings, placed through walls, that drain heavy water flow and debris away from commercial flat roofs. Installing a Scupper on an EPDM Flat Roof Watch the video below.  We are cutting away the edge ...
See Articles

Gutters on Flat Roofs – Important Drainage Systems

Gutter for flat roofs
Flat Roof Debris and Gutter Drainage Flat roofs collect an abundance of debris that can't be removed daily. During rainstorms, this debris gets washed into the gutter trough and clogs it, preventing proper drainage. Over time debris accumulates in the ...
See Articles

Flat Roof Drains and Strainers on Commercial Roofs – Watch Video

Drain Strainers on Flat Roofs
Flat Roof Drains and Strainers on Commercial Roofs Flat roof drains and strainers are the most important components of any commercial flat roof. They are responsible for properly draining any and all accumulated precipitation. To preserve the life of the roof, ...
See Articles

Flat Roof Drains: Location, Installation & Maintenance – Watch Video

Removing standing water on a flat roof/ Improving drain system
Flat Roof Drains: Location, Installation & Maintenance Flat roof drains require the proper location, installation, and maintenance because, as a system, it is fundamental to the preservation of a building's structure. We have seen many times that the location of a ...
See Articles

Flat Roof Drain Strainers – Watch Video

flat roof drain system
Flat Roof Drain Strainers are Important  If appropriately designed, a strainer is supposed to keep larger objects from going down a drain, while allowing smaller debris through with the water flow. Most strainers, or domes, that cover a drain on flat ...
See Articles

Best Flat Roof Drain System

Perfect drain system - less maintenance and less problems
A Flat Roof Drain - 15 years of performance A pleasant surprise about a flat roof drain on a commercial roof we installed more than 15 decades ago. After so many years I am still amazed how well it performs. The owner never ...
See Articles

Scuppers and Drains on Flat Roofs-Wilton, Darien to Greenwich

Scupper on an EPDM Rubber Roof - Flat Roof Repair - New Hampshire
Scuppers on flat roofs are best if correctly placed Scuppers are drain outlets on the edge of a roof. Our service is from Westport, Darien, Stamford, Greenwich, New Canaan, Ridgefield, Wilton, and Redding. A scupper drain outlet can be just a ...
See Articles

Gutter Repairs/ leaks on flat roofs? Stamford Westport CT

Gutter Iced Up during winter - Connecticut - Flat Roof Repair
Gutters constantly have to be cleaned out and re-adjusted Gutters repair is the often overlooked Whether residential or commercial roofs, whether slanted or pitched roofs, they all need gutter repairs. The best draining system is to have a slightly slanted ...
See Articles

Flat Roof Drains. Which is the best drain configuration? – video

Flat Roof drain
 Flat Roof Drains. Which is the best drain configuration? - video Placing or positioning flat roof drains in the right place is essential. Drains connect to pipes below the ceiling that will remove the water away from the building and ...
See Articles

Copper Drain-Making a drain for a flat roof. Avoid Plastic drains

Plastic Drains are not fit for a roof

How to make a copper drain. When you see a plastic drain on a roof, you need to consider replacing it. Plastic and rubber roofs don’t go well together.

Best practices for drains 

Browse through the articles below and see what are the best-draining systems for every situation

DIY Flat Roof Repair Videos and Instructions - determine type of flat roof

DIY Flat Roof Repair Videos and Instructions

Before making a Flat Roof Repair, determine what type of roof you have

Help me with Google - please!

Click the 5 Stars at the top. If you have time write a comment at the bottom - Thanks

Which Drain for a flat roof is best? watch Video

Which Drain to use for a flat roof
There are three types of draining systems found for flat roofs Watch the other articles on drains and scuppers When installing a new roof, it is important to re-design the drains so they would function better. Although drains are the most ...
See Articles

Roof Drains

Flat roof - lower edge to drain water off
Roof Drains Roof Drains are one of the most problematic areas on a roof. The positioning, design, and installation of a drainage system are one of the most important factors to have a relatively low maintenance roof. The average flat roof does ...
See Articles

Copper Drain-Making a drain for a flat roof. Avoid Plastic drains

Making a Copper Drain
Plastic Drains are not fit for a roof How to make a copper drain. When you see a plastic drain on a roof, you need to consider replacing it. Plastic and rubber roofs don’t go well together. Best practices for ...
See Articles

Scupper on Flat Roof Repairs – Effective Drain – Westport

Flat Roof Scupper - Westport. Lower the edge of a roof to remove water from a flat roof.
Scuppers are effective drainage systems - Check out our Drain section of roof drains Scuppers are the most efficient means of removing water from flat roofs - living in Fairfield County, Westport, Greenwich, and Stamford, we get our fair share ...
See Articles

Scuppers – Flat Roof Repair

Scuppers - Flat Roof Repair
Scuppers for flat roofs Scuppers flat roof repair - The cause of a major leak was due to incorrect leader headers on the other side of the wall. Scuppers are perfect for getting water off a roof, but if water ...
See Articles

Flat Roof Pooling Water – Video on installing channel to remove standing water

Standing water on a flat roof
Pooling water on a Flat Roof When you have a flat roof water pool for extended periods of time, it could have negative results to the membrane and structure. These areas that pool also accumulates dirt and leaves that accelerate ...
See Articles

Drains, Scuppers and Gutters – the pro’s and cons

Flat Roof Drain System - Flat Roof Repairs - Massachusetts
The pro's and cons of DrainsScuppers and Gutters. Drains Cons
  • Debris collects through the strainer and blocks the flow of water very easily.
  • Unclogging a blocked drain needs professional people to do it.- costly
  • The roof needs to be cleared of ...
    See Articles

Flat Roof Drains: Commercial Installation and Drainage – Watch Video

Installing a retrofit drain on a commercial roof
Commercial Flat Roof Drains: Installation Position is Critical Drains are an essential part of any commercial flat roof; however, it is critical to position them at the lowest point of a roof. When not appropriately placed, water will pool, causing load-bearing ...
See Articles

Scuppers – A Flat Roof Drain System for Commercial Roofs – Watch video

Flat roof - lower edge to drain water off
What is a Scupper? Scuppers are drain openings, placed through walls, that drain heavy water flow and debris away from commercial flat roofs. Installing a Scupper on an EPDM Flat Roof Watch the video below.  We are cutting away the edge ...
See Articles

Gutters on Flat Roofs – Important Drainage Systems

Gutter for flat roofs
Flat Roof Debris and Gutter Drainage Flat roofs collect an abundance of debris that can't be removed daily. During rainstorms, this debris gets washed into the gutter trough and clogs it, preventing proper drainage. Over time debris accumulates in the ...
See Articles

Flat Roof Drains and Strainers on Commercial Roofs – Watch Video

Drain Strainers on Flat Roofs
Flat Roof Drains and Strainers on Commercial Roofs Flat roof drains and strainers are the most important components of any commercial flat roof. They are responsible for properly draining any and all accumulated precipitation. To preserve the life of the roof, ...
See Articles

Flat Roof Drains: Location, Installation & Maintenance – Watch Video

Removing standing water on a flat roof/ Improving drain system
Flat Roof Drains: Location, Installation & Maintenance Flat roof drains require the proper location, installation, and maintenance because, as a system, it is fundamental to the preservation of a building's structure. We have seen many times that the location of a ...
See Articles

Flat Roof Drain Strainers – Watch Video

flat roof drain system
Flat Roof Drain Strainers are Important  If appropriately designed, a strainer is supposed to keep larger objects from going down a drain, while allowing smaller debris through with the water flow. Most strainers, or domes, that cover a drain on flat ...
See Articles

Best Flat Roof Drain System

Perfect drain system - less maintenance and less problems
A Flat Roof Drain - 15 years of performance A pleasant surprise about a flat roof drain on a commercial roof we installed more than 15 decades ago. After so many years I am still amazed how well it performs. The owner never ...
See Articles

Scuppers and Drains on Flat Roofs-Wilton, Darien to Greenwich

Scupper on an EPDM Rubber Roof - Flat Roof Repair - New Hampshire
Scuppers on flat roofs are best if correctly placed Scuppers are drain outlets on the edge of a roof. Our service is from Westport, Darien, Stamford, Greenwich, New Canaan, Ridgefield, Wilton, and Redding. A scupper drain outlet can be just a ...
See Articles

Gutter Repairs/ leaks on flat roofs? Stamford Westport CT

Gutter Iced Up during winter - Connecticut - Flat Roof Repair
Gutters constantly have to be cleaned out and re-adjusted Gutters repair is the often overlooked Whether residential or commercial roofs, whether slanted or pitched roofs, they all need gutter repairs. The best draining system is to have a slightly slanted ...
See Articles

Flat Roof Drains. Which is the best drain configuration? – video

Flat Roof drain
 Flat Roof Drains. Which is the best drain configuration? - video Placing or positioning flat roof drains in the right place is essential. Drains connect to pipes below the ceiling that will remove the water away from the building and ...
See Articles

Scupper on Flat Roof Repairs – Effective Drain – Westport

Scuppers are effective drainage systems – Check out our Drain section of roof drains

Scuppers are the most efficient means of removing water from flat roofs – living in Fairfield County, Westport, Greenwich, and Stamford, we get our fair share of rain. It is important to make sure that drains are well positioned and function properly. We do all kinds of flat roof repairs that includes scuppers, drains, and gutters.

Our expertise comes from fixing other roofers jobs. So often we will see a new roof installed but the technique is not what it suppose to be. The common problem most roofers have with installing roofs is making a transition to flashing. That’s where most roofs fail. Almost everyone can lay down a rubber roof on a flat surface, but when they have to tie it to metal edging or flashing, then everyone has different ideas.

Flat Roof over Entrance to a Commercial Building – Scuppers Installed 

Flat Roof Repairs – The water used to flow over the edges unto the stairs.This made the stairs very slippery during winter. We installed a rubber roof over tar and gravel and eliminated the drain. Then we installed a scupper instead and water was draining off the flat roof.

There was a pump installed on the roof to get rid of the water. Funny. When designing a roof the most important aspect is to make it maintenance free. Drains are always the opposite. Someone installed a pump to drain the water from the roof. Drains get clogged and to maintain them is costly.

Flat Roof Repair - Scuppers in Westport Building - We installed a rubber roof over tar and gravel and eliminated the drain
Flat roof repair - Scuppers on flat roofs - Someone installed a pump to drain the water from roof. After installing a roof we added scuppers

Instead of a drain, we decided to install a roof scuppers on each side of the roof. This way water could always run off into the flower bed beneath. No more drain clogging.This shows where the water would fall into from the roof. Draining water off a roof has to be away from walkways and entrances.

We installed a rubber roof over the stone and created scuppers.

Flat roof repair - The location of a scupper on a roof is important.
Flat roof repair - The drain was eliminated and scuppers were installed that drained into the planter.

This is what the scuppers look like on a roof. They can vary in sizes but for a small roof like this, it was not necessary to make big scuppers. A closeup look of the scupper. This is a very inexpensive way to drain water off a roof.

Flat roof repair - A closeup look of the scupper.

Which Drain for a flat roof is best? watch Video

Which Drain to use for a flat roof
There are three types of draining systems found for flat roofs Watch the other articles on drains and scuppers When installing a new roof, it is important to re-design the drains so they would function better. Although drains are the most ...
See Articles

Roof Drains

Flat roof - lower edge to drain water off
Roof Drains Roof Drains are one of the most problematic areas on a roof. The positioning, design, and installation of a drainage system are one of the most important factors to have a relatively low maintenance roof. The average flat roof does ...
See Articles

Copper Drain-Making a drain for a flat roof. Avoid Plastic drains

Making a Copper Drain
Plastic Drains are not fit for a roof How to make a copper drain. When you see a plastic drain on a roof, you need to consider replacing it. Plastic and rubber roofs don’t go well together. Best practices for ...
See Articles

Scupper on Flat Roof Repairs – Effective Drain – Westport

Flat Roof Scupper - Westport. Lower the edge of a roof to remove water from a flat roof.
Scuppers are effective drainage systems - Check out our Drain section of roof drains Scuppers are the most efficient means of removing water from flat roofs - living in Fairfield County, Westport, Greenwich, and Stamford, we get our fair share ...
See Articles

Scuppers – Flat Roof Repair

Scuppers - Flat Roof Repair
Scuppers for flat roofs Scuppers flat roof repair - The cause of a major leak was due to incorrect leader headers on the other side of the wall. Scuppers are perfect for getting water off a roof, but if water ...
See Articles

Flat Roof Pooling Water – Video on installing channel to remove standing water

Standing water on a flat roof
Pooling water on a Flat Roof When you have a flat roof water pool for extended periods of time, it could have negative results to the membrane and structure. These areas that pool also accumulates dirt and leaves that accelerate ...
See Articles

Drains, Scuppers and Gutters – the pro’s and cons

Flat Roof Drain System - Flat Roof Repairs - Massachusetts
The pro's and cons of DrainsScuppers and Gutters. Drains Cons
  • Debris collects through the strainer and blocks the flow of water very easily.
  • Unclogging a blocked drain needs professional people to do it.- costly
  • The roof needs to be cleared of ...
    See Articles

Flat Roof Drains: Commercial Installation and Drainage – Watch Video

Installing a retrofit drain on a commercial roof
Commercial Flat Roof Drains: Installation Position is Critical Drains are an essential part of any commercial flat roof; however, it is critical to position them at the lowest point of a roof. When not appropriately placed, water will pool, causing load-bearing ...
See Articles

Scuppers – A Flat Roof Drain System for Commercial Roofs – Watch video

Flat roof - lower edge to drain water off
What is a Scupper? Scuppers are drain openings, placed through walls, that drain heavy water flow and debris away from commercial flat roofs. Installing a Scupper on an EPDM Flat Roof Watch the video below.  We are cutting away the edge ...
See Articles

Gutters on Flat Roofs – Important Drainage Systems

Gutter for flat roofs
Flat Roof Debris and Gutter Drainage Flat roofs collect an abundance of debris that can't be removed daily. During rainstorms, this debris gets washed into the gutter trough and clogs it, preventing proper drainage. Over time debris accumulates in the ...
See Articles

Flat Roof Drains and Strainers on Commercial Roofs – Watch Video

Drain Strainers on Flat Roofs
Flat Roof Drains and Strainers on Commercial Roofs Flat roof drains and strainers are the most important components of any commercial flat roof. They are responsible for properly draining any and all accumulated precipitation. To preserve the life of the roof, ...
See Articles

Flat Roof Drains: Location, Installation & Maintenance – Watch Video

Removing standing water on a flat roof/ Improving drain system
Flat Roof Drains: Location, Installation & Maintenance Flat roof drains require the proper location, installation, and maintenance because, as a system, it is fundamental to the preservation of a building's structure. We have seen many times that the location of a ...
See Articles

Flat Roof Drain Strainers – Watch Video

flat roof drain system
Flat Roof Drain Strainers are Important  If appropriately designed, a strainer is supposed to keep larger objects from going down a drain, while allowing smaller debris through with the water flow. Most strainers, or domes, that cover a drain on flat ...
See Articles

Best Flat Roof Drain System

Perfect drain system - less maintenance and less problems
A Flat Roof Drain - 15 years of performance A pleasant surprise about a flat roof drain on a commercial roof we installed more than 15 decades ago. After so many years I am still amazed how well it performs. The owner never ...
See Articles

Scuppers and Drains on Flat Roofs-Wilton, Darien to Greenwich

Scupper on an EPDM Rubber Roof - Flat Roof Repair - New Hampshire
Scuppers on flat roofs are best if correctly placed Scuppers are drain outlets on the edge of a roof. Our service is from Westport, Darien, Stamford, Greenwich, New Canaan, Ridgefield, Wilton, and Redding. A scupper drain outlet can be just a ...
See Articles

Gutter Repairs/ leaks on flat roofs? Stamford Westport CT

Gutter Iced Up during winter - Connecticut - Flat Roof Repair
Gutters constantly have to be cleaned out and re-adjusted Gutters repair is the often overlooked Whether residential or commercial roofs, whether slanted or pitched roofs, they all need gutter repairs. The best draining system is to have a slightly slanted ...
See Articles

Flat Roof Drains. Which is the best drain configuration? – video

Flat Roof drain
 Flat Roof Drains. Which is the best drain configuration? - video Placing or positioning flat roof drains in the right place is essential. Drains connect to pipes below the ceiling that will remove the water away from the building and ...
See Articles
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Scuppers – Flat Roof Repair

Scuppers for flat roofs

Scuppers flat roof repair – The cause of a major leak was due to incorrect leader headers on the other side of the wall. Scuppers are perfect for getting water off a roof, but if water flow is restricted and water backs up into the scupper again, that will cause leaks.

Here is the Merriam Webster definition for SCUPPER.

Scuppers Flat Roof Repair

Scuppers Flat Roof Repair – This image shows what the scupper opening at the bottom.  There are 2 of these scuppers on the same wall. There are several issues we have found that causes leaks around these scuppers.

Besides the scupper at the bottom of the image, also notice the stucco has deteriorated, and the cement block is showing through. The cracks on the wall will cause leaks, and it will appear if the roof is leaking.

Scuppers flat roof repair - they were letting debris through to clog the leader header

Wall where Scuppers and Leader Headers are mounted

The image shows the wall where the scuppers exit into the leader headers. All the water from the flat roof of the other side of the wall drains through these scuppers and leader headers. Debris washes through the scuppers into the leader headers. The strainers catch all the debris causing a blockage.

Here is a list of issues:

  1. Leader headers are not attached properly to the wall
  2. The leader headers had strainers inside them that blocked the drain pipe with little debris
  3. Someone has added an extension to the leader header making it higher than the scupper, compromising the emergency overflow in case the drain pipe got blocked.
  4. Scuppers are not sealed properly to the wall – water will leak in easily.
  5. Flashing on the wall is not attached properly
  6. No strainers on the inside of the wall to prevent debris flowing through the scuppers blocking the drain pipe.

 

Outside wall from flat roof with scuppers and leader headers
DIY Flat Roof Repair Videos and Instructions - determine type of flat roof

DIY Flat Roof Repair Videos and Instructions

Before making a Flat Roof Repair, determine what type of roof you have

Help me with Google - please!

Click the 5 Stars at the top. If you have time write a comment at the bottom - Thanks

Leader Header not attached to the wall

When a leader header gets blocked with debris, it will separate from the wall causing water to flow down the wall instead of overflowing the rim of the leader header. Scuppers and leader headers have to work together.

Scuppers flat roof repair - Leader Header not attached to wall causing scupper to leak

Extension piece added to leader header causing water to rise to high into scupper

A leader header should always be lower than the scupper. If the drain pipe gets blocked or debris gets stuck in the leader header, then water backing up can spill over the leader header instead of pushed back into the scupper and the wall.

In the image, the scupper is not sealed to the wall and therefore when the blocked leader header fills with water, the water leaks into the wall around the scupper.

In the image notice, the extension piece added on top of the leader header. When water backs up, it forces the water into the wall and the through the scupper onto the roof.

Scuppers Flat roof repair - Extension piece added to leader header causing water to rise to high into scupper

Strainer in leader header causing blockage – forcing water onto the flat roof through the scupper

The strainer or filter in the images was placed in the neck of the leader header, causing to clog fast with a small amount of debris. Because of this, water backs up onto the flat roof through the scupper. The extension on the leader header added to more problems.

Strainer Causing blockage in leader header - that caused a major roof leak

Debris getting through scuppers blocking drain causing leader to fill with water

Scuppers and leader headers get filled with debris very fast. If the scupper were letting the water of the roof without a leader header to catch the water, then it would be fine because the debris will get washed off the roof.

Since there is a leader header funneling all the water into a drain pipe, then it is important to have a strainer to the mouth of the scupper. Strainers should allow small debris through and stop twigs and leaves.

Watch this video on Drains and Strainers

 

Debris blocking the drain causing leader to fill with water

Scupper, and leader header issues force water into the flashing around the scupper and leader header

When water was backing up due to a blocked drain pipe, the water then was forced onto the wall into the flashing.

With a heavy rain hitting the wall this would also cause a leak.

Flat roof repairs always have to do with draining systems. Make sure when you have your flat roof repaired that the drains get particular attention.

Water was forced into the flashing around the scupper and leader header

Flashing above scupper causing leaks

Flashing above scupper is not properly attached to the wall. This also causes leaks.

Flashing above scupper causing leaks

Flashing above scuppers and leader headers are leaking

In the image, the flashing is not sealing properly into the stucco wall. With a heavy rain blowing onto the wall, water will leak into the building.

 

flashing above scuppers and leader headers are leaking

Flashing on wall causes leaks on a flat roof

A closer look at the flashing shows where water is leaking in.

flashing on wall causes leaks on a flat roof

Cracks on the wall cause flat roof leaks

The stucco on the wall has deteriorated and caused the cement block to crack. This is just another issue on the flat roof where water leaks on.

Cracks on the wall cause flat roof leaks

Flashing on stucco wall need repair

Flashing on the wall need re-installing, because water can leak through that area. Flashing on a flat roof makes or breaks a roof. All the issues in the images above have to do with flashing. Most workers do not pay close attention to flashing and cause more harm than good.

Flashing on stucco wall need repair

More flashing issues that could potentially cause leaks

Most roofs and leaks are due to flashing not properly done. For the most part, it is inexperienced people trying to do a job. The other reason is that they under bid a job and try to seal it with caulking or something and hope to get away with it.

More flashing issues that could potentially cause leaks

Hey John DeCarlo

If you got this far reading and looking at all the issues we have mentioned, you might want to take care of this electrical wire that open.

Electrical wire need attention on flat roof repair

Scuppers Flat Roof Repair

A list of what to do:

  1. Replace leader headers with new ones
  2. Install a rubber membrane gasket around the scuppers facing the leader headers
  3. Seal the flashing
  4. Install a rubber membrane over the areas on the wall where the cracks are
  5. Custom make large strainers to be mounted in front of each scupper
scuppers flat roof repair - leader header

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Flat Roof Pooling Water – Video on installing channel to remove standing water

Pooling water on a Flat Roof

When you have a flat roof water pool for extended periods of time, it could have negative results to the membrane and structure. These areas that pool also accumulates dirt and leaves that accelerate the growth of algae and moss which is also harmful to the roof.

Watch videos on how the best flat roof drain system to prevent standing or pooling water on a flat roof.

It is not considered standing water if it evaporates or dissipates within 48 hours. If pooling water does not drain or disappear within 48 hours, it will cause severe damage to the structure over time.

Flat Roof Water Pool weight can cause damage to the structure

It starts with the weight. Standing water weighs approximately 5 lbs. Per inch for every square foot. If the pooling water covers a 10 x 10 feet area, and it is deeper than 1″, then the added weight of this area is approximately 500lbs. This weight will put stress on the joists or beams causing them to bow. The continued pressure will sag the roof more, and a larger amount of water pool will form. This added stress to the roofing membrane will cause the seams and flashing to pop loose.

It is not possible to reverse the bow in the joists after subjected to that pressure.

Read this article about Ponding water in Wikipedia

Flat roof water pool causes leaks and stress to the structure

Clogged Drain causing pooling water

When plants start to grow from a drain that is blocked, then there is a problem. Every time it rains hard enough this roof builds up a big pool of water that causes pressure on the structure and in turn the roofing membrane. Notice how the roofing membrane is not laying flat. This entire flat roof has been compromised.

This roof could have been saved if they kept the flat roof drains open and free from debris.

Standing water on a flat roof due to a clogged drain

One way to get rid of pooling water on a roof is to install a channel

There are times where water is pooling on a roof with skylights and drain pipes sitting in the water. Most contractors will suggest building the low area up so water would not pool. This could be very expensive because skylights will have to be removed and then be re-installed again. Instead, we decided to install a channel leading the water away. This is a much simpler solution when possible.

Watch this video on Flat Roof Repairs and Flashing

This video shows how we made a channel to remove standing water from a flat roof

It is important that the roofing contractor you hire plans the roof installation so that there would be no standing water. We have seen so many times that they would install a roof disregarding the position of the drain or scuppers.

An architect might have laid out a plan and positioning of drains, but it’s up to the roof technician to make sure the water flow properly to the drains. There is nothing worse than having a new roof and water pooling because of bad planning.

In the next video, that is exactly what happened, the roofer was not experienced and caused water to pool in areas that caused structural damage.

Standing water on a flat roof add weight that will affect the structure of the roof

The weight of the water pooling on a roof can cause the joists to bow and in turn cause more water to accumulate. It is is very important to correct this issue before it becomes irreversible and a costly repair follows.

Improving a flat roof drain system on a flat roof will extend the life expectancy and less maintenance over the years needed.

Water Pool on a Flat Roof

This image was taken shortly after it rained and snowed. Notice the little water left on the roof. When standing water can evaporate or dissipate withing 48 hours, then it’s not considered pooling water on a flat roof. The scuppers on this flat roof are the best drainage system.

flat roof water pool evaporates within 48 hours

Standing water on a flat roof – EPDM

Although a small roof, the roof was not pitched towards the gutters causing the water to pool against the flashing on the wall. Because EPDM Rubber uses an adhesive to bond the seams together, the prolonged water saturation caused the adhesives to deteriorate and all the seams starting to separate.

Standing water on an EPDM flat roof- pooling water will disintegrate the adhesives bonding the seams

Installing a drain where water is ponding is another option

Sometimes it is feasible to install a drain at the lowest part of to standing water. This will entail cutting the roof open, installing necessary supports for the drain, and installing necessary pipes inside the building to lead water to the outside away from the building.

This method is much more costly that the above-suggested method with a channel. A drain might be the only answer to the problem if the edge of the roof is too far for a channel or the slope of the roof is not favorable.

If installing a drain is the best choice of removing pooling water, then we recommend following the principle in the 3D animated video. When the opportunity lends itself, then always opt in for a drain as illustrated in the video.

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Drains, Scuppers and Gutters – the pro’s and cons

The pro’s and cons of DrainsScuppers and Gutters.

Drains

Cons

  • Debris collects through the strainer and blocks the flow of water very easily.
  • Unclogging a blocked drain needs professional people to do it.- costly
  • The roof needs to be cleared of leaves and debris daily to prevent water to collect around the strainer – Especially in the fall.
  • When drains are not maintained regularly on a commercial roof, it could cause the water to pond and put stress on the roof structure and ultimately collapse the roof.

Pro’s

  • Drain pipes are inside the building and therefore will not freeze during winter.
  • Drains can be placed strategically in many areas of the roof.
  • Inner drainage systems can’t be seen from outside.

Drains should be properly placed as to remove ponding water

The biggest problem on flat roofs is standing water. It is important to make sure that a roof is properly drained. If water ponds on a flat roof, it could lead to problems later on.

Most residential roofs are sloped to the edge and a gutter system catches the water. There are some residential roofs that are built like commercial roofs and more likely have an inner drain system.

The position of Internal drains are crucial and should be located where water ponding occurs

Gutter Systems

Pro’s

  • Cheaper to install than inner drains
  • Even if a gutter is full of debris, water can still sill over.
  • Debris tends to flow off the roof with the water.

Con’s

  • Gutter systems need a lot of maintenance.
  • Leaves block downspouts easily.
  • Esthetically not pleasing – gutters and downpipes are eyesores on a building.
  • Downpipes and gutters freeze up during winter
Gutters on flat roofs need maintenance - leaves constantly fill gutters up

Scuppers

Scuppers are a very effective way to channel water off a roof. The best is to have a wide scupper, 12″ or wider so leaves and debris will wash through the scupper instead of clogging it.

Scuppers can let the water drop off the roof to the ground or can lead into a gutter system. Many times the problem will come when a leader pipe or leader header gets clogged due to debris and leaves. Winter weather can also freeze a gutter or downpipe and cause the scupper not to function properly.

The best system would be to let the scupper drop the water over the edge of the roof.

Scupper let water off the roof free flowing
Error: View 9281200u7o may not exist

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See Articles

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See Articles

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  • Debris collects through the strainer and blocks the flow of water very easily.
  • Unclogging a blocked drain needs professional people to do it.- costly
  • The roof needs to be cleared of ...
    See Articles

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See Articles

Scuppers – A Flat Roof Drain System for Commercial Roofs – Watch video

Flat roof - lower edge to drain water off
What is a Scupper? Scuppers are drain openings, placed through walls, that drain heavy water flow and debris away from commercial flat roofs. Installing a Scupper on an EPDM Flat Roof Watch the video below.  We are cutting away the edge ...
See Articles

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Gutter for flat roofs
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See Articles

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See Articles

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See Articles

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See Articles

Best Flat Roof Drain System

Perfect drain system - less maintenance and less problems
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See Articles

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Scuppers on flat roofs are best if correctly placed Scuppers are drain outlets on the edge of a roof. Our service is from Westport, Darien, Stamford, Greenwich, New Canaan, Ridgefield, Wilton, and Redding. A scupper drain outlet can be just a ...
See Articles

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Gutters constantly have to be cleaned out and re-adjusted Gutters repair is the often overlooked Whether residential or commercial roofs, whether slanted or pitched roofs, they all need gutter repairs. The best draining system is to have a slightly slanted ...
See Articles

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 Flat Roof Drains. Which is the best drain configuration? - video Placing or positioning flat roof drains in the right place is essential. Drains connect to pipes below the ceiling that will remove the water away from the building and ...
See Articles