Removing wallpaper can leave a mess that should be clean before painting. However, by following a few preparation steps it is possible to paint the walls after removing the wallpaper.

Why Need to Prepare Wall After Removing Wallpaper?

Stripping and scraping layers of old wallpaper can leave the walls covered with adhesive. Sadly, it can leave the wall affected, that you put your efforts to remove every piece of paper. Before you can paint this damaged surface, you need to make it perfectly smooth.

If the wallpaper sticks to the wall due to moisture or humidity, the risk of damage to the wall increases. Moisture trapped through the wallpaper can do quite a bit of damage.

When removing existing wallpaper from a wall for exterior painting, there is always a chance that the wall will be damaged. This can cause the walls to crack and rot. In addition, mold can also grow in wet areas and cause other wall problems. Removing wallpaper can damage walls if not done properly.

Preparing a wall is important for home interior painting, the quality of the paint job will depend on the time and effort you put into preparing the walls. Wallpaper can damage walls if moisture remains behind the paper. Therefore, you need to prepare the wall for paint after removing the wallpaper.

Steps to Prepare the Wall Before Painting

All the hard work removing old wallpaper can leave marks and marks on the walls. Before you can paint the walls, you need to restore the smoothness of the walls.

Scrape Off Old Paper & Glue:

Wallpaper may peel off once the wallpaper has been removed, scrape off as much of the glue and remaining wallpaper with a spatula as possible. To make things easier, try spraying the walls with a mixture of water and a few splashes of dish soap.

Watered down five ounces of wallpaper. Fill the sprayer pump with the mixture and spray it on the wall. Scrub off the remaining wallpaper on the interior wall and leave it on the wall with a wide scraper.

Clean the Wall:

Empty the pump and fill it with clean water. Spray the walls again to rinse them off. Wipe the surface with a damp sponge to remove the rest. Let the walls dry for painting.

Remove Any Remaining Glue:

Wallpaper usually leaves glue when we remove it. Use a solution like Tri-Sodium Phosphate to wash the walls. Gently rub the glue on the wall and try not to wet the wall too much. Solutions can be hard on your hands, so wear gloves when using a harsh solution.

Try to remove all the backing paper if possible as this will show through the paint. Wash the wall with warm water and allow it to dry completely.

Sand and Seal the Walls:

If you have rough edges, sand lightly until they are smooth. Sand walls with a sanding block wrapped in sandpaper. Apply a coat of oil paint to the walls using a roller.

Oil-based paint acts as a sealant to prevent oil stains, stains, or water-based adhesives from entering and interfering with the paint job. Let paint dry. Then check the walls for loose or chipped paint chips. If you find one, sand it. Repaint the area with oil paint and a brush.

Create a Smooth Surface:

If the remaining wallpaper paste roughens the wall, sand it gently to break up the texture and smooth it back out. If you can’t remove all the trim while scrubbing the walls, the sandpaper should do the trick now. Only works on smooth walls. Fill holes, dents, or cracks in the surface with joint compound. Apply the mixture to the holes with a putty tool, then use a utility knife to scrape off the excess. If, after removing the wallpaper, the wall is so perforated that it is not possible to fill every hole with a joint compound, you should apply a leveling compound to the wall.

Watered down a small amount of joint compound until it can be covered and smooth over the wall surface with a roller. Use the blade of a putty knife to smooth out the mixture and remove excess, fill in any imperfections and leave a thin film on the rest of the wall.

Repeat the process with the rest of the walls, continuing in sections. Let the mixture dry and apply a second and third coat as needed. When the grout is dry, you are ready to paint the walls.

Prime the Walls:

Once all adhesive has been removed and the surface is smooth, apply a good coat of latex primer. The latex will soften and remove adhesive residue. Be sure to seal the remaining backing paper properly or it will lift and drag the paint with it.

This is another good reason to remove any remaining backing paper before priming. Cover the repair with a latex primer and let dry. This will help hide the repair after painting.

Patch Any Damaged Areas:

It is not uncommon for the removal of the wallpaper to cause damage to the underlying walls. Use joint compound and a wide putty knife or drywall knife to fill in any dents or nicks. Shaves off any remaining paper. This prevents the edges of the paper from showing through the result. Let dry, then sand well and smooth the edges.

Look for the damaged areas, including holes and tears. Use drywall mud and a putty knife to fill the hole. Wait for it to dry, then sand the area to a smooth surface.

Paint the Walls:

Paint with the roller of your choice. The blotchy areas sometimes appear as dull spots; this is easy to correct with another coat of paint. Use high-quality paint and good painting techniques and you will be fine. Hire a painting company for quality and professional work.