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Community and Q&A

Caulk for glass block to sill

ranson | Posted in Energy Efficiency and Durability on

What caulk would be good for air sealing a 1/4″ gap between glass block (and plastic glass block vents) and the wooden sill plate over it?

As a general plan, is there anything wrong with caulking the exterior, waiting for it to cure, and then filling the rest of the space with canned foam from the inside?

Thanks,

John

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Replies

  1. user-2310254 | | #1

    John,

    I wonder about the aesthetics. Will you be able to see the foam through the block? If so, I would probably use a clear polyurethane to cover the gap and leave it at that.

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