How to Fix a Hump in Sheetrock
- 1). Place the edge of the trowel on the hump, and use a pencil to mark where the trowel and wall do not meet.
- 2
Apply joint compound using a trowel.Brand X Pictures/Brand X Pictures/Getty Images
Put some drywall compound on each side of the hump, using the markings on the wall as a guide. Use the compound to make both sides level with the highest point of the hump. - 3
Press hard on the edge of the trowel when smoothing compound.Jupiterimages/Photos.com/Getty Images
Use the trowel to smooth the area, remove excess compound and feather the sides outward. - 4
A hairdryer speeds up drying time.Jupiterimages/Photos.com/Getty Images
Use a hairdryer to dry the compound. - 5). Use a putty knife to scrape the original surface so it's free of any ridges or tiny bumps.
- 6). Lightly sand the area with medium-grit sand paper.
- 7). Prime and paint the area with a roller to match the existing paint.
Source...