If the damage is greater than 1 3 of the depth steel bars may need to be installed and a full depth restoration may be required.
Can you repair a concrete ceiling.
New types of materials help repair concrete ceilings.
Wear gloves when handling epoxy based repair compound.
Remove any loose debris from the crack and surrounding area with a wire brush and broom.
Something in the support structure or in the concrete itself is failing.
The concrete or support structure are beginning to fail.
When the spalling damage is shallower than 1 3 of the concrete s thickness the concrete usually can receive a surface repair.
Then spray on two to three light coats of good bye cracks.
It works best on hairline cracks but it s worth a try on wider cracks too.
New materials are durable strong expand as they dry and create a permanent repair.
Narrow cracks can be filled with a masonry crack filler that comes in a cartridge designed to be used in a caulking gun.
Keep the area well ventilated.
Cracks or damage to concrete ceilings indicate a problem.
The repair compound will have pushed up a little so you ll need a coarse grade sandpaper designed for metal or concrete to smooth the surface for painting or sealing.
Ordinary cement won t work because as it dries it shrinks.
Start by cleaning loose material out of the crack and fill it with joint compound.
It forms an elastic film that stretches and contracts along with the crack.
Or you can fill the cracks with a vinyl concrete patching compound applied and smoothed with a putty knife.
Clean up spills immediately.