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Felt Paper: The last line of defense

Posted November 30, 2010 by Patrick Morin

Felt paper is one of the first materials put on during roof construction and one of the last materials to protect your home from the great outdoors. Yesterday we discussed three components you should be thankful for, and roofing membrane is one of them. A roofing membrane can come in several different styles: our branded synthetic underlayment or felt paper.

Below you’ll find an example of poorly installed felt paper. Poorly installed felt paper can lead to severe leaks and increased degradation.

SCRIPT

We’re on a roof over off of NE Glisan in NE Portland and we have some blow off issues going on over here. Quite honestly, this roof blew off because they used a 3-tab on it. It was actually code quite a few years ago, they allowed that to happen, a lot of these areas north of Division won’t allow a 3-tab out here because it just can’t handle the wind as it comes through here. Aside from the blow off, something right away was the felt paper. See these x-marks here? This is from the roofer, as they were installing this roof they were cutting the shingles right on top of the roof. Right over the felt paper they were cutting the shingles and installing them. They did that everywhere. If you look up on this you can see x-mark there, crosses there, all these cuts. They might as well have not even put felt paper on this house. Look at all these cuts. That’s from their blades as they were installing this thing, just being lazy, throwing the shingles on the roof, and cutting away. Unbelievable.

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