ghcoe wrote:OP827 wrote:Hi George,
Thanks for recording your experience here. I think your method is interesting and useful. I should save time vs. using wood inserts etc.
Did you try using PL Premium adhesive for installing flashing to foam?
I have not used PL Premium. I do believe others here have attempted to use it for some other applications and were not very pleased with the results. Lately I have been using regular caulking with great results with bonding. I bonded the flashing around my doors with it and then realized I had to remove it. Foam tore out before the caulking gave way. Make me a believer. Just make sure you clean flashing and beading real well. I use alcohol to wipe it down with.
Maybe I should do a sample. Previously I did glue ply to xps foam with PL Premium and it was the strongest joint out of many I have tested, except epoxy. I think a clean metal surface is the key and second, being one component polyurethane, it needs some air access to cure properly. Probably best would be any brand 2K polyurethane adhesive (Polyol and Isocyanate Hardener) that will hold best and does not require air to cure, though it is not available in retail.