Thybar Corp. has released Vibro-Curb, which has integral, vibration-dampening spring isolators. The curbs provide mounting for rooftop HVAC units and come with a 2-by-4-inch wood nailer for attaching ...
Q. Lately I've seen roofers install a strange product that looks like traditional felt paper, but it's not. It has a peel-away backing paper, and this material sticks to the wood sheathing. What is it ...
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