Don t apply sealer over painted walls or efflorescence.
Should you paint concrete basement walls.
These products are typically oil or latex based and they often claim to stop moisture penetration and to actually waterproof the basement.
Once dried on the walls they bond with the concrete coating the surface of the walls in a continuous layer.
Proper painting of these walls requires the removal of any water and mildew before beginning as well as patching the walls to prevent to growth of mold.
When it begins to show some signs of wear often the best choice will be to replace it altogether.
Once you ve ensured that your basement is water tight it s time to paint.
Your basement wall is probably concrete and since concrete paint will only stick to a porous surface you ll want to remove the prior layer of paint if you have one.
It will help prevent the diffusion of water into your basement.
Waterproof paints claim to withstand 8 12 pounds of pressure per square inch.
Yes parging will break down over time because concrete does not have an unlimited lifespan but a properly applied parge coat will last for a very long time.
Painting your concrete basement walls not only helps protect your basement against mold water bacteria and mildew but also adds to the look of your basement especially if you use it as a work or rec room.
If you re going to.
Before you begin make sure you know how to brush walls key cracks and apply liquid waterproofing agents.
Ordinary latex paint is well suited for interior concrete walls.
Use an eggshell or satin latex paint on concrete walls that aren t exposed to much duress.
Get better protection from the elements with a higher pounds per square inch rating psi.
Do pull a permit before making major changes.
If your basement is concrete like mine it s very porous and even if all of your ducks are in a row as far as drainage you can still see quite a bit of minor seepage during heavy rains without it.
If you or a previous owner painted the basement walls you ll have to remove the paint before applying sealer which only adheres well.
While community building rules differ in general you will not need a permit just to seal or paint the concrete basement walls.
Shield your concrete surfaces from water damage.
If the home is old consider running a lead test before beginning removal and have a professional handle the task if the lead test is positive.