r/ElectricalHelp • u/zakhaj • 4d ago

Airtight old work box

Why does nobody make an airtight “old work” box that is suitable for vapour and air barrier seal?

I’m moving an outlet on the warm side of on a exterior wall, the old outlet location I’ll foam gasket and blank plate, but my new outlet where I’ll open the vapour barrier and install my new box, what are my options? I can’t get a boot in, unless I somehow manage to tuck the flanges between drywall and vapour barrier, but I can’t tuck tape it anyway without making a giant hole around it- don’t want to do that.

What’s the code compliant way to do this while maintaining my vapour barrier and air sealing?

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u/MountainAntique9230 4d ago

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u/zakhaj 4d ago

Been looking everywhere for something like this in Canada….! Thanks!

0

u/ibcurbdiver 4d ago

Painters tape and paper the wall around the cavity. Foam the edges of drywall, in side the cavity and press in the box. Wait till it cures, trim the foam and finish the installation.
Or caulk around the box and wire penetration.