For decades roofers have fitted a layer of felt over a roof s sheathing or roof deck before installing shingles.
Roofing felt reviews.
Traditional roofing felt is a felt paper that is soaked in asphalt.
Felt roofing paper is quite thick saturated with asphalt and it s water resistant not waterproof.
It is combines with other water resistant compounds that produce a membrane.
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Of course the 30 lb is considered the better choice for climates like ours in the pacific northwest but it is not necessary in other climates.
Some roofers may assume you re tearing off everything down to the roofing trusses which is expensive because it leads to higher labor costs and the added expense of new sheathing and roofing felt.
Roofing felt offers an additional layer.
Generally speaking roofing felt is a felt paper that is soaked in asphalt and other water resistant compounds to produce a membrane.
It has a life expectancy of 5 years and is great value for money.
Billyoh green mineral shed roofing felt review the billyoh green mineral shed roofing felt is traditionally designed with building durability in mind ideal for garden sheds and outbuildings in need of some added protection.
These compounds include varying blends of cellulose polyester and bitumen.
Of course it is a bit more technical than that but this is the basic idea behind how felt works.
This type of roofing material was the go to for many years up until about 15 years ago.
Felt is commonly sold in either 15 or 30 rolls measuring 36 inches wide.
Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.