Which Sandpaper Grit is Best for Walls?

Home renovation is a task that often requires sanding walls before painting to eliminate any imperfections. If you use a coarse-grit of sandpaper, the job will be faster, but you’re more likely to produce scratches. Consequently, it’s better to use a finer grit of sandpaper as you go over the wall. This way, you’ll be able to achieve walls that are close to being flawlessly smooth without adding scratches to the imperfections on the wall. When sanding drywall, it’s essential to fill any holes or deep gouges with joint compound before sanding over them with 120- or 150-grit sandpaper using only light-to-moderate pressure. It’s also crucial to close the door of the room where you’re working to prevent dust and debris from settling throughout the rest of the house, and to wear a mask to avoid inhaling any dust. In addition to the varying grits of sandpaper, you can buy specialty sandpapers for sanding between coats of paint or surface-removal sandpaper. If you’re sanding the wall to remove paint, you can use a coarser grit to begin with.

Frequently Asked Questions about Sandpaper Walls

• What kind of sander do you use for drywall?

A hand sander with a handle is the best sander for drywall. You can easily stick a half-sheet of sandpaper on a hand sander, and the handle can be used to reach walls without a ladder.

• What is the roughest grit sandpaper?

The roughest grit sandpaper is coarse sandpaper, which shapes wood and removes previous finishes.

• What are the different grits of sandpaper?

There’s a wide range of different grits available. Typically, coarse grits are divided into a set of 60 to 80 grit, 100 to 150 grit, and 180 to 220 grit.

• How do you smooth out textured walls?

If you want to smooth your textured wall, apply a coat of mud all over it and let it sit for a few hours. Once dried, sand the surface smooth. This process is highly effective but time-consuming.

• What is the fastest way to get paint off walls?

Scrapping the wall is the quickest way to remove old paint from the wall. You can use a plastic scraper or a scraper blade to complete the job.

Originally Published: Jul 25, 2011

FAQ

1. What grit sandpaper should I use for walls?

The best grit sandpaper for walls is typically 120-grit or 150-grit. These grits are fine enough to smooth out any imperfections on the surface of the wall without causing damage or removing too much material. If the walls are in good condition, you can use a finer grit like 220-grit for a smoother finish.

2. Can I use regular sandpaper on walls?

You can use regular sandpaper on walls, but it may not be as effective as sandpaper specifically designed for walls. Regular sandpaper tends to clog up quickly and may not be as durable as sandpaper made for walls. It’s best to use sandpaper designed for walls to ensure a smooth finish.

3. Is it necessary to sand walls before painting?

Sanding walls before painting is not always necessary, but it can help to create a smooth surface and improve the overall finish. Sanding can help to remove any bumps, ridges, or other imperfections on the wall surface, allowing the paint to adhere better and look more even. If the walls are in good condition, sanding may not be necessary.

4. What type of sandpaper is best for removing wallpaper residue?

To remove wallpaper residue, it’s best to use a coarse grit sandpaper like 60-grit or 80-grit. These grits are rough enough to remove the adhesive residue without damaging the wall surface. Be sure to use a light touch and work gradually to avoid damaging the wall surface.

5. Can I use an electric sander on walls?

Yes, you can use an electric sander on walls, but it’s important to use a low-speed setting to avoid causing damage to the surface. Be sure to use a sandpaper attachment designed for walls to ensure an even finish and avoid damaging the wall surface.

6. How do I know when to stop sanding walls?

You should stop sanding walls when the surface is smooth and even to the touch. Be sure to check the surface in different lighting to ensure you’ve removed all imperfections. Over-sanding can damage the wall surface, so it’s important to work gradually and check the surface frequently.

7. Do I need to clean the walls after sanding?

Yes, it’s important to clean the walls after sanding to remove any dust or debris that may have accumulated. Use a clean, damp cloth or sponge to wipe down the surface, then allow it to dry completely before applying any paint or primer.