I italicized atop because on very low slope roofs some shingle installation applications specify interlaying a course of felt underlayment perhaps using 30 felt between every shingle course as part of making a shingled roof on a low slope a successful installation.
Roofing felt for low pitch roofs.
It has just one layer so it goes on fast and can be installed by a homeowner with.
This will provide a double layer of underlayment across the entire roof.
Asphalt shingles can be used on roofs with a slope of 2 12 to 4 12 if double coverage underlayment is used.
Asphalt saturated felt along the eaves and lap succeeding courses by 19 inches as shown in figure 2 3.
For starters it s a bit on the thicker side.
Roll roofing is different.
In any case roofing felt alone is can not make a roof waterproof.
Start with a 19 inch strip of 15 lb.
In combination with iko roof fast cap sheets it provides waterproofing properties and durability for low slope roofs.
And one of them is their 30rf standard roofing felt which has a few distinct features up its sleeve.
Product overview the makers at orgill roofing felt have a few solid options for the homeowners out there.
This will provide a double layer of underlayment across the entire roof.
A typical roof has three layers a felt layer and two layers of overlapping shingles.