Sheetrock is a trademarked building material composed of gypsum plaster pressed between sheets of thick paper. New Sheetrock walls are highly suited for paint and do not require a base coat of primer. Unfortunately, the paper coating on older Sheetrock walls often fails, leading to potential problems with adhesion. Combat this dilemma by treating the old Sheetrock with a base primer. Once the Sheetrock is primed, you should have no problem getting the painted finish to properly adhere.
Instructions
1. Dust the old Sheetrock with a coarse plastic brush or broom.
2. Cover areas adjacent to the old Sheetrock with blue painter's tape. Protect areas beneath the Sheetrock, using dropcloths.
3. Coat the old Sheetrock with latex primer, using a roller. Start on the left side of the wall and proceed to the right. Use a polyester brush to prime portions of the Sheetrock that prove inaccessible to your roller. Allow the primed Sheetrock to dry for at least two hours.
4. Wash your roller/brush with water.
5. Paint the Sheetrock just as you primed it. Allow the finish to dry for two full hours.
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