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Old 08-11-2011, 11:22 PM   #1
sweaty
 
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Should I Caulk Gap Between Drywall and Subfloor?


I'm getting a laminate floor put in. My installer has ripped out the baseboards and old carpet. Is it a good idea to use this opportunity to caulk or spray foam the gap between the drywall and subfloor? I don't want to interfere with the floor installation.

This house, built in 1977, is pretty leaky. As we are also getting new kitchen and bathrooms, the drywall is down in those rooms. I am amazed at the big gaps between the sheathing and studs. There is much evidence on the insulation of air blowing in. I figure the whole house must be like that.

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Old 08-11-2011, 11:25 PM   #2
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Should I Caulk Gap Between Drywall and Subfloor?


I'd caulk away. I wouldn't recommend spray foam. That stuff is pretty messy and can expand where and when you don't want it to. Then you'll have to go back with a utility blade and hack away so you can get your baseboard back on. Best off to caulk with a damp rag that you can use to wipe up any "over-caulks" as you go.

Make sure the joint is clean or else it won't adhere and seal properly

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