Hi out there I some one can help me.
I have an old high set q/lander and a lot of years ago the floor underneeth was concreted and Iwould like to make a sewing room for the boss in part of it.
My problem is there is a white powder/ dust forming on the surface, some times you can see a moisture mark and if you leave a cardboard box on the floor it gets damp.
Is there any product i can put over the concerte to prevent this.
If anyone can help it would be appreciated.
Thanks John