If dealing with a large space it is crucial to work in sections particularly when sanding by.
Sanding down concrete wall.
Cleaning and leveling along the way.
After you have prepared the area it s time to choose your sandpaper.
Sanding walls of any type requires a machine that is both powerful and fast.
Give the wall about 15 minutes of dwell time then test the texture with a fingertip.
The sandpaper you choose depends on the quality and intensity of sanding you want to do.
4 thoroughly sand the concrete.
If concrete is applied to a wall incorrectly the first time it can feel rough or uneven.
Spritz the old concrete with a little water to make it damp before applying the cement paint.
The angle grinder is loud and it will produce a lot of dust.
Powerful to easily get rid of the old rough paint and fast so you can achieve a high quality smooth finish.
Wash the walls with dishwashing soap and water.
A diamond pad is the only type strong enough to cut through.
Sanding the wall can often take care of the problem but it is difficult to sand a very large surface smooth and you might end up with places that are recessed while others are higher making the wall look worse than before.
How to sand concrete walls step 1.
To prevent the inhalation.
Make sure the patched area is dry before attempting the grinding process.
The grinder will only work on fully.
Instructions thoroughly wipe down the surface to ensure there are no debris that could leave pits.
Normally you d start by using a coarse grit sandpaper that is in the range of 40 60 grit.
As in any diy project the key to an excellent final product lies in proper preparation and having.
If aiming for a specific type of finish measure and mark the necessary depth on the surface s edge 1 16 1 8 or 1 4.
When the texture is soft enough for you to rub it off all the way down to the drywall beneath it s time to.
Put on all safety gear.
Remove the soap residue by rinsing the walls with a sponge and.
Press the grinder.
Attach a diamond sanding pad to a hand held grinder.
Fill any holes or dents with a good patching slurry.