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Re: Water Proof Membrane

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Before entering on an epoxy repair, consider first whether the cracks are
affecting the structural performance of the wall. If they are not, and the
cracks are due to thermal movement or other non-structural recurring cause,
use a flexible waterproofing sealant rather than an epoxy.

Also consider what is causing the leakage through the sidewalk (assumed from
your post). In NYC, this is a common construction and a common cause is the
application of salt to the sidewalk during the winter. This can have a large
impact on the choice of waterproofing membrane. If would be better to seek a
solution which avoids the cause rather the corrects the resulting problem.
You indicated you could not raise the level of the sidewalk - can you lower
the level of the soffit?

James Cohen, PE
James Cohen Consulting, PC

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