Excessively Porous Subfloor
Any subfloor surface that has an extremely rough surface, such as concrete that has recently been shot-blasted (blastracked), any subflooring that has leftover residue of old latex adhesive, recently skimcoated, rough wood subflooring, etc. Such subfloor conditions can create bonding issues and lead to the necessity of using sealers or a greater amount of adhesive to properly adhere floorcoverings.
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