Answer for Sheet Rock

Several ways to tell;
1- If you gouge at the surface the sheet rock will be very crumbly and fall apart. Use a corner of a stiff putty knife or 5-way.
2- Severe damage could bow from the surface. Mostly applies to large areas.
3- The surface paper could be bubbled or easily pulled away from the rock surface.

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Answer for Sheet Rock

How do you know if water stained sheet needs to be replaced? How do you know if the material behind it is damaged from the rain/snow that caused the water stained sheet rock needs to be replaced (installation)?
Thanks

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Answer for Sheet Rock

Yes, as long as the sheet rock is in good stable condition. Water stains will need sealing with a stain resistant primer. Oil base Kilz or a tinted shellac will work the best. Apply 2 coats of primer before the paint.

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