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Old 08-23-11, 02:57 PM   #1
wendortb
Lurking Renovator
 
Join Date: Aug 2011
Location: Indiana
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Default Caulk drywall to floor?

I have read that a major air leakage area is where the walls meet the floor and roof. In new construction, they have the sill plate foam to air seal this area.

I have also read about air sealing using drywall and caulking behind the drywall at the top and bottom when applied.

I was wondering, for an existing house, would it be beneficial to seal the drywall along the bottom edge to the floor? I would think this would create an air seal and since most people have base molding, you wouldn't see the caulk.

I have heard the argument that drywall expands and contracts, but at the top it is normally attached to the ceiling using joint compound. This isn't always cracked so I don't think it is doing that much moving.

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