Shingle Bonding Question

Old 05-05-07, 06:18 AM
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Shingle Bonding Question


Concerning roof shingles.

I understand that there is some kind of "adhesive," or perhaps just plain tar, on the undersides
of the normal 3-Tab style.

The nailing in of these provides the major adherence to the wood underlayment of course, but how important is the
adhesive bonding ? How does it actually function ?

Is this bonding to the wood, or is it to the underneath shingle (only) ?

How many weeks, generally, of hot weather does it takes this bonding to be effective ?

Old 05-05-07, 07:39 AM
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The backside of the 3 tab shingle has no adhesive. The front or top side has spots of tar that seal the edge of the next shingle to it. On a sunny day the tar heats up and melts causing the shingle above it to stick down. Depending on how sunny it is the sticking could happen in 1 day. At the most by 1 week all shingles should be stuck. Wind and rain will slow this process.
This is important as this keeps the edge of the shingle from being blown up in the wind and letting rain get under the shingle.

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