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How to Repair Cement or Concrete Surfaces

You noticed that your basement or garage floor needs some patching and leveling. No problem, here are easy to follow steps on how to repair, fix or patch uneven concrete surface and missing cement pieces or cracked cement or concrete surfaces.

Depending on the type of the damage here is how to proceed:

How to Patch Concrete Surfaces
How to Level Concrete Surfaces
How to Repair Cracked Concrete Surfaces

Steps to Patching Concrete Surfaces

remove any loose or flaky concrete using a masonery chisel and a hammer
vaccum the floor
apply floor-patching compound
use a trowel to make smooth transitions to surrounding areas
scrap the area smooth once the patching compound has cured

Steps to Leveling a Cement Floor

remove any loose material using a chisel and a putty knife
clean concrete of any dust, oils, dirt and paint residue
apply a layer of concrete primer using a paint roller
allow concrete to completely dry
mix the floor leveler with water per manufacturer’s instructions
pour the leveler and spread it quickly using a rake
use a trowel to make sure the leveler is flush with the uncovered surface
let the leveler dry per manufacturer’s instructions

Tools and Materials Required

chisel
putty knife
concrete primer
paint roller
paint tray
loor leveler
gauge rake
trowel

TIP

Do not atempt to level out the grading of the floor as 1/2″ distributed over 4 linear foot is typically required for drainage of condensed moisture.

Additional steps before painting the concrete surface or building a subfloor:

verify the level of radioactive radon gas in your basement before building a basement subfloor
verify the level of moisture before painting a concrete basement or garage floor

Here is More Information About Radon Gas in Homes

Ignorance is not bliss - is radon slowly killing you?
Detecting Radon
Mitigation Methods

How to Verify the Level of Moisture in Cement or Concrete Surfaces

tape a 1 square foot of clear plastic on the concrete surface for 24 hours
if there is moisture on the plastic after 24 hours you have a moisture problem - here is how to fix a moisture problem