Limestone Foundation Deterioration

[dphi201]

I have a large building on a limestone foundation. The interior & exterior walls are covered with some sort of cement and painted with white paint, I am assuming this is a waterproofing paint. However on an interior wall near our gas meters the wall has crumbled and exposed the limestone blocks. What type of material do you recommed you use as a Plaster type mixture to fill in where this has broken off and to patch this area. I am planning on doing this and then repainting the walls with the white paint and then the floors with the gray.

[Adrian Gordon]

Gday, you should make sure that there is no moisture in the wall causing the deterioration. If so your efforts will be futile. If no moisture then I would expect a cementitious filler would do the trick. May need pinning or being limestone you could carve out and replace a whole block.

[dphi201]

thanks!