203 858 0080 naas@mac.com

Scuppers – Flat Roof Repair

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

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.

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
Scuppers - Flat Roof Repair

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Metal Roof Gone Bad – Pittsburgh – Silicone sealants are the worst

Metal Roof Gone Bad

This “metal roof gone bad” was treated with a silicone sealant approximately three years ago. From the evidence, it is clear that the company applying the sealant didn’t know what they were doing.

After investigating and making tests:

  1. The silicone sealant was cracked where the two metal plates joined.
  2. Water got trapped and caused the metal to rust. In some areas, it has rusted and corroded to where the insulation underneath was visible
  3. Most fasteners had water trapped around it and was rusting the metal
  4. The silicone is peeling around the vent units. No sealant or coating will stick properly on a petroleum product.

What we take from this is, that the surface was not prepared properly before the coating was applied. From our experience, no matter how well the surface preparation, silicone sealants do not last more than two years at best.

Why do metal roofs start leaking?

A metal roof should last a long time. Most leaks on a metal roof start with the fasteners. With metal roof installation, screws are used to fasten the roof sheets to the trusses. Thes screws have a rubber or neoprene washer that would make the seal between the screw head and the metal plate.

Over time these rubber or neoprene washers hardens, becomes brittle and crack, compromising the seal and is the beginning of a small drip leak. At first, no one might be aware of it. But over time the water that accumulates around the screw under the washer will cause the metal to rust or corrode making the fastener hole, larger.

Also, with the constant expansion and contraction of the metal, the washers are worn down. For this reason, it is wise to have a metal roof inspected every five years to make sure that the screws are still at the proper torque strength and to ensure the washers are still holding up.

 

Metal Roof Screws and rubber or neoprene washers are the cause for leaks

Watch this video to see how water gets trapped under the silicone causing the metal roof to rust.

Why we decided that a repair is not wise

  1. We could repair it, but because of the silicone coating, we might miss many areas, and this would mean we will have to make numerous trips after the repairs. That could frustrate the client and us
  2. After the repairs, the silicone could loosen up in other areas, trap water and cause new leaks
  3. The cost of repairing will be more than a 1/3 of the cost of replacing it with a new roof
  4. A proper warranty is not possible
  5. Money and time spent on any repairs will be a waste
  6. Our name and reputation is on the line – one bad job and unhappy client can cause more damage for us to potential customers in the future
No Thanks – it’s not worth it
Before considering a metal roof repair, a careful examination of what’s on it and what others have done to it must be taken into account.

Our solution to this metal roof:

Step 1- Preparing the roof for a plywood installation

Remove all debris and screws on top of the risers. Remove and clean silicone sealant from the air conditioner and vent flashing. After preparation, to install 19/32 CDX plywood fastening it to the risers with metal screws.

We use a thicker plywood than a 1/2″ because of the metal roof flexibility.  Install support 2 x 4’s in areas where needed.

Plywood installation over metal roof

Smooth surface ready to install a Rubber Roof Membrane

This image shows what it looks like once the plywood is installed over a metal roof.  The plywood creates a flat surface for a rubber roof installation. The space under the plywood is left open so that air can move freely through. The air movement keeps the roof much cooler.

Plywood installed over a metal roof

Step 2 – Installation of a Self-Adhering Base

Install a self-adhering Modified Bitumen Base sheet over the entire surface of the plywood.

Install aluminum drip edge. We use a heavy gauge aluminum drip edge.

Modified Bitumen self-adhering base sheet is installed

Step 3 – Modified Bitumen Cap sheet installed

After the installation of the metal edging, it’s time to install the cap layer. To Install a white granular Modified Bitumen Cap sheet. The ceramic granules protect the rubber membrane from ultraviolets and also reduces heat absorption.

A special primer is used to secure the cap sheet to the metal drip edge.

Modified Bitumen Rubber Membrane installed over the base sheet

Step 4 – Flashing

After the installation of the cap sheet, installation of flashing follows on all the air conditioners and vent units. Removal of silicone coating that covers all the metal for proper flashing.

Flashing around all the vents and drains are made

Metal Roof Gone Bad

Metal roof gone bad – The image shows what it looks like when you peel back the silicone from the seams on a metal roof. It is wet and rusted. We have seen this over and over where an attempt was made to seal a metal roof with disastrous results.

The reason why silicone coatings or other types of coatings will not work are:

  1. The metal can never be 100% clear from all debris, dust, oils, and rust. Especially around fasteners and seam overlapping.
  2. Where two metal plates overlap is constant movement from the expansion and contraction of the metal. The constant movement will cause the sealant to either crack or peel off.
Metal Roof Gone Bad - peeling back silicone reveals the problems

Silicone Coating over a metal roof seam

Notice the small crack that has developed on the silicone surface. This layer is the 3rd attempt repairing the seams. You can see that by the different colors of sealant applied on top of each other. The constant movement of the metal under the silicone will always cause it to crack.

Silicone coating developing crack over metal roof seam

Metal Roof Gone Bad around Fasteners

When peeling back the silicone coating that was covering the screws on the metal roof, we found them all wet and rusted. By just looking at the surface it wasn’t apparent that there were any problems, but a closer investigation revealed the truth. The screws or fasteners is where most “metal roof gone bad” issues are.

Metal Roof Gone Bad - fasteners are rusted and all wet

Commercial Roof Repair on flashing,vents, skylights, roof drains

Commercial Roof Repair – Roof Drains, Flashing, Vents, Skylights

Commercial Roof Repair can cover a wide variety of issues on a roof. These repairs include vents, skylights, air conditioners, flashing and drains. All these objects have one thing in common, flashing.

Whether the roof membrane is a TPO, EPDM or Torch Down, every roof system has its techniques to deal with metal flashing. Flashing is the transition part from a roof surface to and object like a skylight or drain. Most roof problems are due to incorrect installation by the technician and not the roof membrane itself.

In the case of EPDM Rubber Membrane, the issue could also arise from adhesive failures on the seams and patches. Installation of a roof around drains, skylights, and vents, many seams and patches are made on the corners of these objects. With EPDM, these are multiple layers of roofing membrane glued over each other. These seams cause leaks and will frustrate anyone when it comes to commercial roof repairs.

Commercial Roof repair on a metal roof
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Many leaks are due to the transition from an obstacle like a vent pipe, skylight to the roof. The seams created in these transitions will sometimes open up or cause water to stand to rust the metal making it leak.

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Our Beginnings…

Flat Roof Doctor is a family-owned and operated roofing business. For the last 30, ears we have specialized in the installation of rubber roofing for both commercial and residential properties in Connecticut, New York, and now, in Pennsylvania.

My name is Naas Ferreira. My late wife, Mia, and I arrived in the United States, from South Africa, in the mid-1980s and started a flat roofing business in Norwalk, Connecticut. At that time our company name was Flat Roof DoctorDuring the early and mid-1990s, Mia and I began a family and had 3 wonderful boys. Later, two beautiful girls would complete our family.

My very first flat roof installation was for a well-known man named, William F. Buckley, a conservative commentator and founder of the National Review magazine. At that time, flat roof contractors were transitioning from the Tar and Kettle roofing systems to rubber membranes, however, the rubber roof industry was experiencing some problems with the bonding of rubber to metal. We developed a technique that secured rubber to metal, which was a breakthrough, and a remedy to the problem.

We pioneered the use of rubber membranes in Fairfield County, Connecticut; when other roofing contractors were still installing Hot-Tar-and-Gravel roofs, we began using our 2 ply Modified Bitumen Torch Down Roofing System, and never looked back. Since then our technique has evolved, and has become a system that is far more superior than any other roofing system.

As the business grew, my 3 sons took an interest and began helping me on holidays and during their summer breaks from school. Today, Team Ferreira has been fortunate enough to have expanded the business to New York and Pennsylvania locations.

Soon, a daughter will join Team Ferreira, to become the executive assistant (the boss) with the entire Team’s blessing.

Our first van when we started to install rubber roofing.
Our business grew and we needed another van.
Andre with Naas when he was still a teenager
Andre as a teenager helping on a roof
Erik, Andre and Sven with the camera on a roof

… And Now

Sven – Project Manager

Sven is the youngest of the 3 boys and joined the team 4 years ago. Besides being a project manager, he is also our photographer and videographer.

Sven Project manager

Andre´ – Estimator and Project Coordinator

Andre has been roofing for almost 8 years. He knows rubber roofing well and has taught himself to work with slate, copper, and shingles. He is a problem-solver and takes on all challenges.

Andre - Estimator and Project Coordinator

Erik – Operation Manager

Erik runs most of the day-to-day administration, but provides estimates, and coordinates projects, as well. The entire team still gets on roofs to lend a hand where necessary.

Erik - Operation Manager

Naas –

Naas provides estimates and oversees projects in the Pennsylvania area.

Naas owner and CEO

Learning a Trade at a Young Age

From a young age, the three boys helped on roofing projects during their school vacations. These projects have taught them a trade that entails problem-solving, responsibility, and accountability in the real-world. The picture shows Andre at 16 years old working as a team member.

Andre learns how to replace substrate.
Erik helps repair a flat roof.

Sven – 14 years-old

Sven, the camera “man” on the roof taking a selfie. This was long before selfies became popular. He was on the roof during school vacations and learned how to use a camera and edit videos. Most of the videos on this site were taken and edited by him.

Sven, at the age of 14 taking pictures and videos on roofs we worked on.

Roofing Projects “Through the Eyes” of My Boys

When the boys were young they took a lot of the video footage and pictures of roof installations. In the image below, Erik handles the camera.

Erik and Camera

Erik is on camera duty today.

Erik carrying the camera to the roof. This was when everything was still fun

Andre and Dad

At a very young age, Andre took a compelling interest in learning how to estimate and plan roofing projects.

Andre and Naas planning a roofing job.

Andre

Andre is preparing a parapet wall to be installed with a rubber membrane and a metal cap.

Andre cleaning a parapet wall for roofing

Erik

Erik mans the camera shooting video footage of us as we strip a commercial roof.

Erik on the camera taking video footage of a flat roof

Andre

Andre is 16 and helps to strip a roof.

Andre stripping a roof when he was 16 years old

Sven is a Natural Camera Man

Below is Sven taking videos for the family roofing business.

Sven on the camera taking videos of a flat roof

Flat Roof Drains

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Commercial Roof Installation Over Tar & Gravel – Watch Video

Commercial Roof Installation Over Tar & Gravel – Watch Video

A Commercial Roof Installation – This Video explains the method of Installation of a Torch Down Rubber Roof over Tar and Gravel

There are still some Old Tar and Gravel Roofs in existence. Instead of removing the old roofing system, a new Commercial Roof Installation can be achieved over the existing with a considerable cost saving.

Video Transcription - Commercial Roof Installation: 2 Ply Rubber over Hot-Tar-and-Gravel

Hi, My Name is Erik, with Commercial Roof USA

Commercial Roof Installation

I’m here on a commercial roof that was a gravel, a pitch and gravel roof here. And they called us into re-roof it and we’re we decided to go over because rather than strip all the gravel off and all the old tar, we saved them a lot of cost by going directly over and I started about an hour ago and this is our fiberglass liner that I am laying down right now. Um, this is the first step.

Self-Adhering Base

Next comes the self-adhering base than our final layer of modified bitumen torch down. So, as you can see I’m going over gravel right now. I’ll finish it up and I’ll show you the progress as the roof gets completed.

Cost-Effective Roofing System

This is the most cost effective roof put on uh rather than stripping it down to the wood and removing all the gravel and the debris all that labor and also the time that it takes. This is one of the most cost effective roofs that you can do. We go directly over and um it’s just as good as if we stripped it all the way down.

Same Warranty

You get the same uh, you know warranty, um but this is one of the most cost-effective ways to do it both with time labor and debris removal. This is why we advocate this because this is an excellent roof it’ll last you easily twenty thirty years and it is half the cost of the other roofs out there.

Process of Installing a 2 Ply Rubber Roof

Alright, I’ve already laid down my uh fiberglass liner and uh I’ve anchored it down. This gives the roof the strength and stiffness it needs and uh we have a two-ply system we do. This is the first of those of the two ply. It’s a self-adhering base. You can see right here it’s already starting to it’s already starting to adhere and it’s gonna stay that way um and then after that, we are gonna torch our modified membrane to this fusing it together.

The Best Rubber Roofs

This is why it’s one of the best roofs out there. Uh, you get a two layer membrane as well as the protection, the fiberglass liner. You can’t beat it. Uh, so we went with white on this roof to reflect the sun and to keep it cool and um here’s the granular that you see on top and these are made of ceramic these are ceramic granular and uh they protect against the UV rays which usually break up the roof.

Ending Prematurely

This makes it end prematurely and then uh we’re fusing this layer directly to our other two layers and I’ll show in a second just how thick it is but this is why this is a good system it makes it one unified membrane all across.

Thickness of the Layers

So uh, let me show you how thick it is here. Alright, you see? That’s how thick it is. You could see, I might be able to peel this open. There’s our first layer, the fiberglass liner, that gives that strength that’s anchored down to the to the roof with screws. And then I can’t separate the other two cause they’re fused together, but uh you can see how thick that is that and uh also the strength that fiberglass liner gives it; it’s not as pliable anymore.

What You See is What You Get

You see that? That’s the roof that you’re getting. This is what makes it one of the best systems out there especially over gravel or anything like that. Okay uh, we are ready to do the curb flashing around the chimneys and skylights and now we’re just rolling out the big the big rolls over here to finish up the roof. Look how they flow together.

Commercial Roof Installation: 2 Ply Rubber over Hot-Tar-and-Gravel

Our commercial roof installation of a 2 ply rubber roof, over hot-tar-and-gravel, has been tested and proven to withstand extreme weather, foot traffic, and harmful UV rays, for many decades. The system consists of a reinforced fiberglass asphalt base sheet, placed directly over the gravel, and fastened down with plates and anchors, to the roof. Over this fiberglass base sheet, we install a self-adhering membrane; this combination becomes our first ply. Lastly, we fuse a cap sheet of Modified Bitumen Torch Down Rubber to it, which has embedded ceramic granules on the surface, for protection against harmful UV rays.

Commercial Roof Installation: New Modified Bitumen Rubber (MB) over Old MB Rubber 

When a roof has an existing MB membrane, there is no need to remove it, rather, fusing an additional MB Torch Down membrane to it, creates a 2-ply rubber membrane.  The installation of this type of roofing system will reduce labor costs and provide a life expectancy of 40 years, and beyond.

Although a 2 Ply MB roof is the best roofing system, it can be compromised if roofing technicians do not have the experience and skills to perform the necessary flash detailing around mechanical units, drains, and vents. Most importantly, however, the entire surface of the membrane must be skillfully heat fused with a torch.

This video explains the Three Roofing Systems commonly used: TPO, EPDM, and Modified Bitumen Torch Down

Video Transcription - Flat Roof Installation Systems Compared

Explaining the 3 Roofing Systems 

I want to explain to you about the three different systems that are available on the market for redoing a roof over a commercial roof. First of all you get the TPO type of membrane which is a white membrane and it a vinyl or PVC type of material and it’s called a single ply membrane. Then you can get the EPDM. Let me show you the EPDM here at the bottom. Andre want to this is the EPDM membrane and it’s also a single ply membrane like the inner tube of a car.

Comparing Two Rubber Roofs

You can see it stretches like that and then you get another single ply membrane which is the modified bitumen membrane like this one. This is a modified asphalt and it becomes rubber. The three systems are all called single ply membranes and they all have a different technique of installation.

TPO is Heat-Welded

TPO needs to be heat welded on the seams and you need to have a surface that is fairly flat and smooth before you install it and the same with the EPDM. EPDM is very thin and hold that side Andre and also it’s a single ply membrane and it has to be installed over very smooth surface and it’s a glue down process.

That means contact cement. You add contact cement onto this side and the other side and you glue them together and that way that’s how the seams are done. Uh this is how easy you can penetrate through uh EPDM. I can hold it there. You see the knife? It goes just like that. Easy.

Modified Bitumen is a Thicker Membrane

Modified Bitumen is a thicker membrane and it can be installed over almost any surface, a rough surface. It’s not necessary has to be smooth. What makes this such a better system, or a better membrane is you can hardly get through the membrane. That’s how hard it is to get through this membrane. I can barely get my knife through there.

Install a Modified Bitumen Membrane

I have to put a lot of pressure in it. Now the way you, what we do is we have gone a step further. We install the modified bitumen membrane over another membrane on top of a base paper. Now, I’m going to explain this to you, but we call it a two ply system. A two ply system is by far the best roofing system out there.

Life Span of a Roof

There’s nothing that can come close to it. All these single ply membranes even the modified by itself, they give a guarantee of twelve to fifteen years. That’s what the life expectancy is. That’s not enough for a commercial roof. If you have a commercial building, you don’t want to replace the roof every twelve fifteen years. The system what we have is a two-ply system. Let me I’m gonna just explain to you. Here we’re busy doing a roof over the stone here and you can see the stone. We smooth out the stone like this then we add a fiber liner.

A Fiberglass Liner for a Rubber Roof

This is a fiberglass liner that can go over the stone. You can see the stones doesn’t come through. It doesn’t penetrate through. That is to give it the stiffness to the roof and make it like a rigid roof. After we install the fiber uh, uh liner, then we install a single ply self-adhering membrane. You can see this is sticking to this base.

Installing a Base

It’s starting to stick there. You see there? This is sticking to the base and after we install that fiber liner and then this base, we then torch down our membrane, the final layer on top of this self-adhering base. By the time you’re done, it becomes a very thick roof and this system can be installed over any type of roof any surface without having to strip the cost of stripping an entire roof and it will last you guaranteed thirty to forty years easily no questions about it.

The Thickness of a Roof

This is what it looks like. Look how thick it is. I don’t know if you can see it. Can you zoom in onto this Erik? Let me get the EPDM. Can you see the two difference there? This is the difference in thickness. Can you see it? And this two ply system, you can do modified a single ply system we don’t recommend that.

It’s still a single ply roof, but once you go to a two ply system with a modified, you cannot do it with EPDM you cannot do it with TPO, that white uh, uh, vinyl type of roof, but you can do it with a modified, you can do two ply system with the modified and you’ll have the best system out there. Nothing can beat it. So, I explained to you about the two ply system. So we went over an original built up roof.

Old Hot Tar Built Up Roof

This is the old hot tar built up roof hot tar and paper and it started cracking and the owners of this building wanted to reroof and so we went over the hot tar. This is a two ply system. There’s the first membrane and there’s the second membrane. I cannot get it apart. It’s stuck to it.

The first membrane is sticks to the hot tar and the next one we torch to this it sticks to this. It’s indestructible! Then you can look, pan over this this is how it looks like we went over here. This area has stone underneath here. We went over the stone area and you can see we still in the process. We almost done.

Torch Down Membrane

This is the membrane the torch down, and this is the second base here; the self adhering base and then we have the liner the fiberglass liner and this is the stone here. We almost complete with this roof and this roof will outlast any other system out there. I don’t care which one you bring to me.

TPO Not Lasting Long

The TPO, the EPDM, they cannot last as long as this roof would last. This will last thirty to and I’m sure it’s gonna go to fifty years. This is how good this type of roof is and leaks? No way! It can never leak even if they don’t the whole thing about single ply membranes is technique.

Installing TPO

TPO has a certain technique the heat weld and so has EPDM has certain techniques, but the glue on EPDMs do fail after three or five years or ten years. That contact cement, it fails in the heat. Both of the TPO and EPDM are not UV protected. They don’t have the protection. With the modified it has the granular surface that has UV protection, it’s double the thickness then we added another layer it makes it three or four times thicker than any other single ply membrane. No UV can destroy it, and that’s the best system out there. Bar none!

Modified Bitumen: Four Reasons to Install an MB 2 Ply Roofing System 

  • Embedded ceramic granules protect the membrane against harmful UV rays.
  • The membrane becomes five times thicker than a single-ply membrane (EPDM and TPO).
  • Seams are fused together with a propane torch creating a monolithic membrane.
  • It will withstand more frequent foot traffic and snow shoveling, than EPDM or TPO systems.

Commercial Roof Installation: A 2 Ply MB Roofing over any other Roof, is Cost-Effective

When an existing commercial roof needs to be replaced, the best system to install is a 2 Ply Modified Bitumen Torch Down Membrane. Not only can this 2 ply system be installed over a Hot-Tar-and-Gravel Roof system, it can also be installed over an existing EPDM Rubber Membrane, and a TPO Membrane,  making it cost effective.