Do You Have to Prime Drywall Before Painting? Expert Guide
Yes, you have to prime new, bare drywall before painting. Ordinary primer drops drywall permeance from about 50 to 5, and vapor-retarder primers can take it down to 0.5 to 0.9, which is why primer, not finish paint, is the coat that seals porous gypsum board and evens out absorption. I've stood in plenty of […]
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