How Thick Should A Modified Bitumen Roof Be

Class a ballasted 1.

How thick should a modified bitumen roof be.

Often when a homeowner calls you for a roof repair or replacement time is of the essence. Then a modified bitumen membrane embedded with ceramic granules is heat fused down to the base completing the 2 ply system. Whatever the reason these time sensitive requests require contractors who can quickly provide a roof proposal and get to work. The base sheet is often self adhered to the roofing substrate.

The asphalt and rubber combination makes it durable and holds up to so much more than your standard roofing. There are two main types of modified bitumen sheets. A modified bitumen roof generally consists of two layers. Dibiten poly 4 5 modified bitumen.

Listed specifications single ply membrane systems unless otherwise specified the insulation and base sheet are mechanically fastened to the deck. Modified bitumen roofing was designed for use on buildings that have a low slope or flat roof. Modified bitumen roof installation inspection troubleshooting repair life expectancy definition properties of modified bitumen roofing modified bitumen roofing materials products metal roof supply sources modified roof inspection leak diagnosis repair maintenance modified bitumen roof shingles superkatepal questions answers about mod bit modified bitumen roofs. The cap sheet is either torched down cold adhered or self adhered modified bitumen can also be applied in hot asphalt.

This roof system can withstand heavy foot traffic by work crews snow shoveling and because it has embedded ceramic granules on the surface it will. Maybe their roof suffered storm damage or they re selling their home or they ve found a leak that s damaging their ceiling. The combination of these layers makes the membrane over 3 8 thick. If the slope is greater than 4 12 which provides more water drainage from the roof use one layer of 15 felt.

If the slope is between 3 12 and 4 12 use two layers of 15 felt for asphalt shingles. It is a roll roofing that is applied with liquid mastic and has a surface finish of small rock granules similar to a 3 tab shingle roof. A base sheet and a cap sheet. The advantages to a modified bitumen roof i have already told you that they have less maintenance and good lifespan but another great advantage is the strength.

The mem brane is heat fused in place. Modified bitumen roofs have a lot of advantages over other types of membrane roofing and are often seen as the modern alternative to the built up roof. The type and amount of roofing felt to apply varies according to roof slope. The material is used for roofs with a low slope or nearly flat.

Modified bitumen roofing membranes 55 6 4 u l.