even if so, that still would have only gained ONE EIGHTH inch. Not to mention there is no such thing as 3/8" drywall readily available anymore. Knowing bob, he was spouting off about fire protection again. Shit he knows nothing about.
2.5 Screw some little pieces of wood 1/2" in from the surface and attach the drywall to them. Cut the drywall to be just smaller than the opening.
Saran Wrap. Get the white kind.
He meant 3/8/
They even have 1/4" if you need it.
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