the house has a stone foudation that a little water and dirt seep thru. what would be a good method to seal this ? Would a layer of thin set be good to adhere t it and maybe moisture paint on top of that ? The outside of the wall has an asphalt parking lot so i don’t want bto dig it up . what would be best without digging outside
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Replies
That's a tough one.........
as whatever wants in from outside will most likely push off whatever you put on the inside.
It would tidy it up until it cracks because of movement and moisture. Expect some parts to release and fall off.
How is the asphalt sealed to your foundation now? and is water directed away from the wall?
The asphalt is sloped away from the wall but no it is not sealed there. that is a good point i will seal it there as well.
there were issues with the gutternot handling a heavy down pour but are in the process of fixing that . I think alot of what was happening was the rain water was splashing back at the building
Besides any cracks in the asphalt
The joint at the wall, where driveway meets the stone is uneven I suppose, and a possible entry point for moisture. I'm not sure if the Urethane caulks would work with asphalt, but it you find that it's compatible (call or write a supplier) concentrate a beautiful caulk bead there.
Tremco has several colors available.
or, look at the OSI brand of caulking. Good products both.
In a commercial setting I think they primarily use a drizzle of liquid ashalt sealer-but that seems to last only a couple yrs and doesn't really seal well to stone or concrete (suffering the same moisture push from the masonry. It just dries out and loses it's grip.
yea i'll use a polyurathane caulk and i'll keep looking for some kind of cement for it . any perticular products anybody use with good results ?
Yeah, the first thing to do is to take care of drainage outside the building.
Not much you can do on the inside that will be much more than cosmetic, unless the foundation is in need of tuck-pointing.
Try surface bonding cement
35 years ago I owned a house with a similar foundation.
I used a masonry product that was designed for use with dry stacked concrete blocks that would be troweled over the surface in a thin (1/8) layer. I had used it on a small block foundation and thought it might work.
It comes premixed (just add water). Seems to be some sort of mortar mix with fiberglass strands.
I mixed it to something somewhat stiffer then drywall compound, dampened the wall ahead of me and toweled it on.
It cleaned up the wall nicely, in spite of my poor toweling ability.
I can't tell you about it current condition as I sold that 30 years ago, but it was holding up fine for the time I was there.
The only caveat it that wall had no serious hydrostatic pressure, just the occasional dribble of sand or water before my work was done. It is always best to deal with foundations from the outside when possible.
Terry
If you don't mind the 'whitewash' look over stone, Thoroseal and/or UGL DryLok (tampico brush-applied) do help if you're stuck with an interior-only approach. A two-coat application of Thoroseal (to maybe 1/16"-1/8" build) is equivalent to 3/4" of solid concrete for waterproofing. Any loose areas or (especially) outright holes should be filled with UGL hydraulic cement first.