Modified Roofing Paper

These steps show a torch down method which looks a bit scary but actually is not too difficult.

Modified roofing paper. The torch down installation method and a peel and stick installation. 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. The term cold applied is referring to o. The type of substrate and the performance objectives influence the specification of the modified bitumen membrane system.

Today modified bitumen mb is king with cap membranes torched on to fuse them to fiberglass reinforced interplies or base coats. Its main purpose is to prevent moisture from leaking into a roof. Stick roofing material that installed correctly should last many years. 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 is also very rugged and can sustain a fair amount of foot traffic. If you install the smooth product cover it with aluminum coating. Burs consisted of alternative layers of heavy building paper and hot tar. At one time built up roofs burs once represented half of all flat roof coverings.

As with other types of modified bitumen materials. The standard types of felt are 15 and the more waterproof 30. The numbers ihad a correlation to the weight not the thickness. Developed in europe in the mid 1960s modified bitumen roofing has been used in canada and the united states since about 1975.

Felt paper is applied across the entire roof deck. 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. 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. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.

Synthetic underlayment technically non bitumen synthetic underlayment is the preferred underlayment of most roofing professionals today. Roofing felt also called roofing felt paper is underlayed on roofs before shingles are added. Modified bitumen roofing may have a granular surface as shown here or it may be smooth. How to install torch down modified bitumen roofing.