I was wondering for some opinions here. I posted a question about using triply as an underlayment. I finally got a reply from Gaf saying it is not suitable but they won’t say why.
Here is my question what is the best replacement. I am going to shingle our cottage (thumb of Michigan)5:12 pitch 30yr Elk HD Wip ice and rain Shinglevent II ridge vent but now I am looking for underlayment.
Is titanium worth $160 a roll (ABC supply) what are my other options I don’t care for #15 #30 felt.Is titanium BETTER than other products?
The house has a mold problem in the attic but it only has can vents and no soffit vents I am adding shinglevent II and soffit vents every 3rd bay and plastic chutes. I am going to replace the top to rows of sheathing with new 1/2 osb not get rid of mold.