Note that roof systems typically include more than one type of material a built up roof for example will typically include the built up membrane itself with or without gravel as well as some kind of insulation and cover board which will vary in thickness from roof to roof.
Modified bitumen roof membrane thickness.
Roofing sbs modified bitumen membranes.
The reinforcing fabric and bitumen binder are combined into a single roll which makes installation easier.
Membranes have annual thickness loss due to weathering.
The thickness of tpo single ply membranes varies from about 40 to 80 mils.
Evolved from time tested bur roofs the standard commercial roof application for over 100 years modified bitumen roofs have membranes modified with sbs to attain rubber like qualities or app to attain the durability of plastic.
106 mils 2 7 mm 110 mils 2 8 mm 120 mils 3 0.
Cold adhered asphalt adhered.
Class a ballasted 1.
This article describes modified bitumen roofing materials choices installations inspection defects roofing repairs and product sources.
But how do you know which choice is best for your project.
What is modified bitumen roofing.
Membrane roofs are most commonly made from synthetic rubber thermoplastic pvc or similar material or modified bitumen membrane roofs are most commonly used in commercial application though they are becoming increasingly common in.
Modified bitumen systems are a modern evolution of the age old built up roofing bur systems in place on building as for 100s of years.
The mem brane is heat fused in place.
Modified bituminous membrane roofing.
Page top photo courtesy of w.
Polymer modified roof membranes often referred to as modified bitumen are an improvement over built up roof systems and have been in use since the 1960s.
Smooth surfaced tpo roof systems are typically easier to clean and maintain than granular surfaced roofs like modified bitumen.
The choice is matched to the needs of the building roof.
Listed specifications single ply membrane systems unless otherwise specified the insulation and base sheet are mechanically fastened to the deck.
Modified bitumen roofing membranes 55 6 4 u l.
Dibiten poly 4 5 modified bitumen.
Bur systems consist of multiple layers of roofing felt embedded in hot mopped asphalt.
If your roof is situated in an area where punctures from sharp or falling objects like large branches are a concern it is advisable to.
Membrane roofing is a type of roofing system for buildings and tanks.
Modified bitumen roofs or mod bit roofs are a single ply roofing systems applied using heat to seal seams between runs of roofing material.
