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I want to finish the basement of my four year old house. I assume I need to seal the walls first but there are so many sealants on the market. Which one would you use? Also, the builder installed a rigid foil backed insulation down to the frost line - I assume I should also pull that down and seal behind that. What I am not sure of is what to do afterwards.
Should I chuck the old insulation, frame the walls, then install new insulation between the studs OR should I put the builder installed stuff back up, frame up against it leaving no insulation on the lower half of the wall below the frost line?
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>>1214135
If they are vacuum sealed panels then build over them, it's the best insulation and if they bothered to spend the money on them they sealed the wall behind it too. Drylock is also one of the best sealants you can buy commercially.
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I'm also curious, I have a pretty dry basement but it has these drainage Wells along the wall
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Look into a product called "InSoFast"
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Paint it all with Drylock, hope they didnt fuck up the drainage and frame with metal studs if you're good with them. Have it spray foamed if you have the money, rigid foam board if you dont.
>>1215528
I just finished doing this on a basement remodel a couple months ago. Cut the concrete floor, dug a trench and laid drain tile all around the perimeter that led to a sump pit. We put these little plastic things kept a small space between the concrete floor and let any water that came in run down the wall and into the drainage trench, kind of like a reverse flashing.
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