On Jun 16, 11:08 pm, wrote:
Dear Readers,

I've a block foundation wall with full basement. After heavy rains,
water seeps in from one part of the wall and has bubbled the paint
about 6" above the floor and seeped up along the edge between the wall
& floor in the same area.

I want to excavate the exterior, install a sloped perf pipe drain
along the footing, apply a dampproofing coating to the exterior wall,
and apply either tar paper or plastic sheeting over the
dampproofing.

Is tar paper better than plastic to waterproof the wall? If plastic,
what thickness? The thickest plastic I can find at HomeDepot is 6mil,
but I'm concerned that it might tear.

All suggestions appreciated!

-Anthony M. Falcone

Neither sheet material will work well by itself.
The wall must be sealed.
Here is one way to do it:
Clean the exposed wall with a power washer and allow a day or two for
it to dry.
Repair chips, cracks, or holes to seal and give a relatively even
surface.
Using brush or roller, coat the surface. Make sure all pores are
sealed.
Use fiberd or non-fibered roof & foundation coating.
Allow coating to cure for a day or two.
Protect coating with asphalt felt paper or inulation sheeting.
T