Modified Roofing Paper

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 roofing paper.

The numbers ihad a correlation to the weight not the thickness. The term cold applied is referring to o. 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. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.

Roofing felt also called roofing felt paper is underlayed on roofs before shingles are added. Burs consisted of alternative layers of heavy building paper and hot tar. How to install torch down modified bitumen roofing. Cold process modified bitumen roll roofing is another way to apply rolled roofing other than hot mopping or torching.

The standard types of felt are 15 and the more waterproof 30. Depending on local weather waterproof underlayment may be recommended. These steps show a torch down method which looks a bit scary but actually is not too difficult. Synthetic underlayment technically non bitumen synthetic underlayment is the preferred underlayment of most roofing professionals today.

Modified bitumen roofing may have a granular surface as shown here or it may be smooth. If you install the smooth product cover it with aluminum coating. The type of substrate and the performance objectives influence the specification of the modified bitumen membrane system. Felt paper is applied across the entire roof deck.

At one time built up roofs burs once represented half of all flat roof coverings. Its main purpose is to prevent moisture from leaking into a roof. Stick roofing material that installed correctly should last many years. Modified bitumen roofing is also very rugged and can sustain a fair amount of foot traffic.

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 torch down installation method and a peel and stick installation. Developed in europe in the mid 1960s modified bitumen roofing has been used in canada and the united states since about 1975. There are two main forms of modified bitumen roofing installation.