Can you sand concrete foundation walls?
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.
Can you sand a concrete wall to smooth it?
Textured concrete walls can be attractive, but may not be for you. 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.
Can I sand concrete with sandpaper?
For basic sanding, use sandpaper with the grit between 40-60. To remove minor irregularities, use 80-120 grit sandpaper. For perfect finish and smoothness, use superfine sandpaper with grit ranging between 200-400. If there are severe imperfections, then you need to use a floor grinder or special diamond disc.
Can you sand concrete with an orbital sander?
An orbital sander is the correct equipment to use when sanding concrete. You will want to have several different grit sizes of orbital sanding discs on hand. To remove only a small rough patch or uneven area, you can use 1000-grit automobile black sandpaper, which is very fine and will not remove much of the concrete.
How do you grind down a concrete wall?
Besides grinders, which are the ideal equipment for smoothing the roughness out of concrete walls, you can also use shot blasting or sandblasting to deal with very rough walls. You can also use scabblers or chisel scrapers, which are more abrasive than grinders and will remove as much as 6mm from the concrete surface.
How do I sand my basement walls?
Wear gloves, a mask and goggles to protect your eyes and lungs from concrete dust.
- Wash the walls with dishwashing soap and water.
- Attach a diamond sanding pad to a hand-held grinder.
- Press the grinder to the wall and begin applying firm pressure.
- Wipe the walls with a damp towel to remove the sanding dust.
Can you sand concrete to make it level?
You can use a two-handled sanding and buffing machine with a sanding pad attached to the bottom to sand out large sections of both concrete and wood floors, although you should vacuum out the pad periodically throughout the process to keep the sanding pad working at peak efficiency.
Can you grind concrete smooth?
Yes, all concrete can be polished. Any pre-existing concrete can be ground down and smoothed with the right devices and skills. But, the ease and difficulty of the concrete grinding can vary depending on how old the slab is. In general, older concrete is much easier to grind.
Can you file down concrete?
You can file concrete to give it a more finished appearance, smooth out rough edges or even to create artistic sculptures. Generally when filing concrete, you should use a rasp instead of a regular file because the larger teeth or grit on the rasp are better suited to the rough texture of the concrete.
Can I sand concrete instead of etching?
Yes, you will need to grind in order to remove the sealer at the surface and provide a proper profile for the coating. You cannot acid etch. The reason is that the sealer prevents the acid from reacting with the minerals in the concrete since the concrete is sealed.