I recently had a roof leak and the roofer repaired it. When he replaced the concrete roof tiles he used some foam adhesive product (like GREATSTUFF?) and it was fine when he left but after 3 hours I went up to check the tiles have lifted. Our of 12 or so tiles replaced 4 of them were lifted due to the foam expanding more than anticipated. I removed those four and would like to redo it myself, can someone suggest a good product to use that doesn't expand as much? Location is south Florida if that matters.

moved into this house 2 years ago, we just had water leaked from porch floor into part of bedroom ceiling. we are in rainy area and depend on winds, the porch floor get water a lot. water seems came in along one of the joist and soaked the rest of drywall panel, I opened up a big area, no visible water, musky, high moisture, been running dehumidifier. need help with 1. how can I determine if waterproofing was done before the ceramic tiles on the porch 2. i see one of the floor area sank lower than the rest and water can stuck in there. i suspect these water leaked through the grouts? 3. without redo the flooring, any suggestions on what I can implement for waterproofing the floor and ceiling? thank you! [img]https://cimg5.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/image0_74e6ce239b9c6638cb1f13ebb1ea1b916aed9fca.jpeg[/img] [img]https://cimg3.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/image1_6e2cbbb57a530e5be9c5a8eccbb1aeaaa2853976.jpeg[/img] [img]https://cimg6.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/image2_39156704b1cf3016f908178a914cf3eb24731bc2.jpeg[/img] picture#1: ceiling opening picture #2/3: upstairs porch floor, ceramic and sanded grout. i haven't done any seal since moved in.