Modified Roofing Paper

How to install torch down modified bitumen roofing.

Modified roofing paper.

Stick roofing material that installed correctly should last many years. The type of substrate and the performance objectives influence the specification of the modified bitumen membrane system. The finished roofing membrane may consist of one or more modified bitumen sheets or it may be comprised of a combination of built up roofing bur felts and one or more modified bitumen sheets. As with other types of modified bitumen materials.

Felt paper is applied across the entire roof deck. The numbers ihad a correlation to the weight not the thickness. At one time built up roofs burs once represented half of all flat roof coverings. It was developed as a means to improve roofing membranes when product quality was affected by the use of a lower quality crude oil by product.

Modified bitumen roofing may have a granular surface as shown here or it may be smooth. Burs consisted of alternative layers of heavy building paper and hot tar. The term cold applied is referring to o. Modified bitumen roofing is also very rugged and can sustain a fair amount of foot traffic.

If you install the smooth product cover it with aluminum coating. Cold process modified bitumen roll roofing is another way to apply rolled roofing other than hot mopping or torching. 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. Self adhering modified bitumen roll roofing is designed for flat roofs with a pitch or 4 12 or less typically found over shed type garages and second floor porches.

Synthetic underlayment technically non bitumen synthetic underlayment is the preferred underlayment of most roofing professionals today. Depending on local weather waterproof underlayment may be recommended. There are two main forms of modified bitumen roofing installation. The standard types of felt are 15 and the more waterproof 30.

Today modified bitumen mb is king with cap membranes torched on to fuse them to fiberglass reinforced interplies or base coats. Roofing felt also called roofing felt paper is underlayed on roofs before shingles are added. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary. The torch down installation method and a peel and stick installation.