New bathtub surround - Printable Version +- Woodnet Forums (https://forums.woodnet.net) +-- Thread: New bathtub surround (/showthread.php?tid=7354694)

New bathtub surround - Cooler - 04-20-2020 I am installing a new bathtub surround over an existing cast iron bathtub. I have replaced the existing mineral wool insulation with fiberglass insulation and I have installed 6 mil plastic over the fiberglass.  I have to install the cement backerboard.  Do I allow the backer board to rest directly on the lip of the tub or do I leave a space (1/8" ??)? Do I use silicone adhesive to adhere the 6 mil plastic sheet to the lip of the tub? Do I leave an small gap between the tile and tub? Do I use grout for that gap or silicone caulking? I am not too worried about this installation as that bathroom is a guest bathroom and the shower has been used perhaps 5 or 6 times in the past 22 years.  (I don't get too many overnight guests.) I am doing this for two reasons:  It keeps me busy enough that I don't go out of the house at all on the weekends, and it will help with the resale value of the house.  (Our company is an "essential" business--we make components used by Department of Defense contractors and also components for the filtration business and they cannot produce drugs without that filtration so I am going to work during the week.) RE: New bathtub surround - crokett™ - 04-20-2020 1. yes. actually I left it about 1/4 short so there was room for the tile to overhang the backer slightly and hide it. 2. i didn't, the backerboard would keep the plastic in place 3. yes 4. caulk, color matched if you can.