Modified Roofing Paper

Roofing felt also called roofing felt paper is underlayed on roofs before shingles are added.

Modified roofing paper.

Depending on local weather waterproof underlayment may be recommended. The type of substrate and the performance objectives influence the specification of the modified bitumen membrane system. Synthetic underlayment technically non bitumen synthetic underlayment is the preferred underlayment of most roofing professionals today. Cold process modified bitumen roll roofing is another way to apply rolled roofing other than hot mopping or torching.

Burs consisted of alternative layers of heavy building paper and hot tar. Modified bitumen roofing is also very rugged and can sustain a fair amount of foot traffic. There are two main forms of modified bitumen roofing installation. 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. Developed in europe in the mid 1960s modified bitumen roofing has been used in canada and the united states since about 1975. The numbers ihad a correlation to the weight not the thickness. 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.

When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary. These steps show a torch down method which looks a bit scary but actually is not too difficult. 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. The term cold applied is referring to o.

Stick roofing material that installed correctly should last many years. 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. As with other types of modified bitumen materials. 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.

How to install torch down modified bitumen roofing. The torch down installation method and a peel and stick installation. The standard types of felt are 15 and the more waterproof 30. Modified bitumen roofing may have a granular surface as shown here or it may be smooth.