When a stone foundation leaks, most of the time the water comes through the mortar joints between the stones. Over time mortar breaks down, crumbles, needs to be removed and new mortar needs to be applied, this is called repointing. The key to repointing a stone foundation like most things, is allowable preparation. The old mortar needs to be removed with a chisel and hammer or some type of crack chasing tool. Once the foundation has been prepared properly, new mortar is tuck pointed between stones.
While this in itself is not a guarantee to stop water it will drastically sacrifice water seepage and help to verbalize the structural integrity of the foundation. Water supervision on the covering of the foundation can drastically sacrifice water seeping into a stone foundation. If there are gutters on the house the downspouts should never drain directly next to the foundation. Gutter downspout extensions or private piping to drain the downspout is recommended to keep the water away. In cases where there are no gutters, a curtain drain installed colse to the covering perimeter will help to carry the water away from the foundation. In some cases a concrete apron poured colse to the foundation perimeter on the covering can be helpful if the water has a place to run to.
DRYWALL SETTLEMENT
In greatest cases when the above methods are not enough, an interior French Drain that runs to daylight or into a sump pump principles can be installed. A vapor barrier that runs up the wall and ties into the French drain principles can channel any water coming through the stone foundation walls into the drainage system.
How to mend a Fieldstone Foundation DRYWALL SETTLEMENT
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