3) Water pipe leak under floor slab - A leaking water pipe will also cause moisture to move up through a floor slab and initially mimic the sweating caused by a missing vapor barrier. But eventually the water will start to pond in an area or bubble up from small cracks.
impassive â(comparative more impassive, superlative most impassive) 1  Having, or revealing, no emotion. 2016 May 22, Phil McNulty, âCrystal Palace 1-2 Manchester Unitedâ, in BBC: It was a victory that clearly meant so much to Van Gaal as the normally impassive manager raced from his seat in the technical area to celebrate Lingard's winner. Still or motionless.
(Ä­mâ²pÄsâ²) n. 1. A road or passage having no exit; a cul-de-sac. 2. A situation that is so difficult that no progress can be made; a deadlock or a stalemate: reached an impasse in the negotiations. [French : in-, not (from Latin in-; see in-1) + passe, a passing (from Old French, from passer, to pass; see pass).]