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Green roof simply means your roof has some form of vegetation growing over top of the roof membrane. A green roof can be applied over either a torch on, EPDM or self-adhered system. Special mats are installed to hold/shed the water and contain the root system of the chosen vegetation. Not only are these roofs great for the environment they help keep your building cooler in the warm weather lowering AC costs to you.
Self-adhered roofing is very similar to torch on except with no heat to apply the product. Instead it is installed using a 2-part roll on glue and self-adhering roll on roofing. It is a perfect option for small flat roofing projects and where smell and flame might be an issue.
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Modified Bitumen Roofing (MBR) commonly known as “Torch on roofing”, was born out of the desire to improve bitumen’s waterproofing characteristics by adding rubber (SBS) to the bitumen. (hot tar)
An SBS blend is more elastic than bitumen. The blend performs better when a roof is exposed to significant increases or decreases in ambient temperature over short periods in time. This makes it perfect for our climate (Most of Ontario).
The heat of a torch is used to fuse layers of SBS membranes together creating a single layer roof system. Alternatively, adhesives or more expensive self-adhered membranes can be used to adhere the layers together.
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EPDM is an extremely durable synthetic rubber roofing membrane widely used in low-slope buildings in Canada and North America. EDPM is available in both black and white. EPDM can be installed either fully adhered, mechanically attached or ballasted, with seams of the roofing system sealed with specially formulated tape.
These roofs are applied using no heating system of any kind. In most situations, the rubberized mat is simply glued in place.
As with any roofing system, there are also drawbacks to EPDM which should be considered. To begin with, these roofs cannot be installed by the homeowner, and even some professional installers who claim familiarity with these roofs may, in reality, have done little more than watch an installation video. Obviously this particular problem can be solved by using the trained and certified installers at NPR Exteriors, who are certified and have a verifiable track record of experience successfully installing EPDM roofing.