2007-02-15 03:48:52 · 3 answers · asked by ~oOjimbeanOo~ 1 in Home & Garden ➔ Decorating & Remodeling
It's a tar strip. When the tar strip gets hot it sticks the bottom of the shingle to the top of the underlying shingle preventing the tabs from blowing up.
2007-02-15 03:56:48 · answer #1 · answered by Anonymous · 2⤊ 0⤋
If you look at the top surface of a shingle, you will see a row of "tar spots". These are designed to melt and stick the tabs of the next row of shingles to the one below so that the wind does not lift and damage them. They work because the shingles are overlapped as they are applied on the roof.
I think the strip you are referring to is the clear celophane strip on the underside of shingles. They serve to keep the shingles from sticking to each other as they are bundled, packaged, and stored prior to installation. If you put one shingle directly on top of the other, you will see that the celophane strip on the bottom of the top shingle lines up with the tar dots on the topside of the bottom shingle ... thereby preventing them from sticking together.
Good luck with all of your home improvement projects.
2007-02-19 10:44:12 · answer #2 · answered by exbuilder 7 · 0⤊ 0⤋
Called "heat strip"
It softens when the sun beats on the roof & "glues" the shingle tabs down.
2007-02-15 11:58:32 · answer #3 · answered by Anonymous · 1⤊ 1⤋