Answer for Painting Hardi Board

For the taping use fiberglass drywall tape and a setting type of joint compound. The setting compound is a powdered drywall compound available in bags. You can choose different setting times, from 20 minutes to an hour or more. I like the 45 minute type. Go ahead and tape and finish as normal.

The backer board and joint compound will need priming before painting. Use an acrylic primer.

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