Sanding Concrete Walls Smooth

If you use a wet dry sandpaper you can wet the area before you work to keep dust down.

Sanding concrete walls smooth.

Step 1 sand any particularly bad areas of concrete with rough grit sandpaper. 5 smooth the concrete. Rinse and repeat literally until you ve reached the desired smoothness. This grinder is mobile but still effective in smoothing rough uneven concrete before polishing with a fine grit grinding paper.

These grinders are also hand held. Choose coarse grit sandpaper in the 40 to 60 grit range for basic sanding and stripping. There are basically two methods used to smooth off hardened concrete surfaces. The belt grinder is used strictly for removing and grinding large amounts of concrete.

However they are fitted with 60 grit sanding belts that spin at high speed. You can make it smooth by using the second finest sandpaper you have putting your sander on the highest speed setting and then beginning from one corner of your concrete surface and finishing on the other. Start at the bottom corner of one wall and in a single. The best way to create a smooth surface for your wall is to limit your sanding and apply a thin overlay of correctly finished new concrete.

Remove uneven patched areas of concrete by sanding it with an angle grinder. Patches of cement are often uneven and stand out from the rest of foundational walls especially if cracks in the original walls necessitated the repair. After dampening the surface and before it dries a mixture of dry cement and sand is rubbed over it with a wad of burlap or a sponge rubber float to remove surplus mortar and fill the voids. For the smoothest finish use superfine sandpaper 200 to 400 grit or higher.

Dry grinding is done of dry concrete surfaces to remove fins and marks caused by forms. It s critical to your overall success. Usually the patched areas are visibly noticeable even if the area gets painted. Whether you are completing the project by hand or with a machine you will need proper concrete sandpaper.

After you have finished all the other steps it s time to give your concrete a new and fresh look. This sandpaper is made using diamond when traditionally sandpaper is made using sand. Allow the surface to thoroughly dry remember concrete is porous so give it a day or two for the best results and apply a concrete sealer. For smooth finishes and removing minor imperfections use 80 to 120 grit sandpaper.

If you don t use the right sandpaper you will not be able to complete the job. Wipe the surface with your sponge to remove the debris then move to the next finer grade of sandpaper. Wet the pointing trowel and hold it upside down as you scoop the mortar loading up its lower side.