The interior of my stone basement foundation wall has been mortared it is starting to sand off. What is the best way to seal it off so I can paint it again? The home was built in the 20's and has no water problems.

1 Answer 1


If the mortar is crumbling and flaking, it MUST be removed. It is a tedious job, bit to assure a good solid surface, you have to remove all loose mortar, key it, and point all the joints. Let it cure a few weeks, be absolutely it is dried, then go for the finish. If you don't get to a solid base, you will be wasting your time and paint. Remember, the right way is the only way.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.