When the two layers are pressed together they form a seal.
Rolled out roofing layers.
If not a third layer with granules is applied in the same way.
Some rolls are self adhesive some are nailed down on the roof and some require heat welding during the installation.
Position and roll out the roofing carefully because it is not easy to reposition then press it into the cement.
The reason why most people go for rolled roofing over shingles when it comes to low plane roofs is primarily the cost.
Then set the first course in the cement so it overhangs by about 1 4 inch.
Use a trowel to spread roofing cement over half or more of the strips.
Place the top edge of the roofing along the chalk line.
Roll out and cut roll roofing to cover the length of the roof.
Owens corning deckseal sa sbs cap 39 375 ft w x 32 833 ft l 100 sq ft shasta white roll roofing.
Nail only its top edge the part that is bare of mineral coating.
As it is rolled out the roofing professional will use a torch to heat the bottom of the cap to the top of the base sheet.
There are three systems including glue down torch down and peel and stick.
This roofing material consists of 2 or 3 layers with asphalt composite and a felt base.