sbs roofing application on a flat roof

Guide to SBS Membrane Roofing Material

The most popular options for flat roofing material are tar and gravel, EPDM, and SBS roofing systems. Asphalt shingles just aren’t an option for this kind of roof, you need something much more durable that’s designed to protect against pooling and leaks. In this article we’ll tell you all about SBS: what it is, a couple different types, and its pros and cons.

What is SBS Roofing Material?

SBS membrane is a type of modified bitumen membrane that is made from blending asphalt with rubber to make a very durable product. One of the types we use is called 2-Ply SBS Torch-on where we use torches to melt the seams together, creating a uniform sheet.

Another type of SBS roofing system we use is called 2-Ply Mop Base/Torch Cap , which is quick and easy to apply, and it’s very durable because it’s also made of rubber and asphalt.

Here are some of the benefits of using SBS Roofing Material

SBS membranes create a watertight seal, they stand up well to heat, cold and wind, and they provide insulation. They can also stretch and relax with temperature, making them great for Edmonton weather that can change from freezing to balmy in an afternoon.

They can be installed over almost any roof base including steel, wood, concrete, and cement fiber (when there is a base sheet).

SBS can be easier to seal than tar and gravel roofs because it comes in big sheets and if all the seams are heat-welded together they will be waterproof. We say ‘’can be’’ because if your roof has a lot of vents, chimneys, pipes, or other things on it, these are all places where we have to take special care and make sure there is nowhere water can get in.

SBS roofing material is much lighter than tar and gravel and puts less strain on your structure. The less weight that is on your roof, the better because when heavy snow, hail, or rain collect on your roof it can cause warping or, in the worst case, roof collapse.

You can expect your SBS roof to last a long time – manufacturer specs vary, but with care and maintenance, your roof can last 20-30 years, or more!

Nothing’s perfect, right? Here are some of the drawbacks of SBS Roofing Systems

Patching holes or cracks is easy, but finding them is not Finding a hole in SBS membranes is like finding a needle in a haystack. And if your roof gets a lot of foot traffic or debris on it, you’re at a higher risk for damage.

SBS membrane systems can also be quite expensive and cost more than other flat roofing materials like tar and gravel, which, if installed correctly by experienced tar and gravel professionals like us, can last just as long.

Lack of a standard for what makes up an SBS membrane can cause quality of materials to vary. Crest Roofing has been in the roofing business for over 30 years, so we can tell what the quality the existing roofing material on your home or business is. Unfortunately some roofers cut costs by installing cheap systems that don’t last. We use high quality products and we guarantee our work, so you don’t have to worry about paying for a lemon.

Crest Roofers can expertly install your SBS roofing system

Are you thinking about installing an SBS roofing system on your home or business roof? Crest Roofing can give you a recommendation and a free quote. We’re happy to do installations quickly and professionally. If you already have an SBS membrane roof, we can do roof repairs and maintenance for you too.

Give our roofing experts a call at (780) 466-1601 or send us a message to find out how we can help you!


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