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I have existing adhesive residue on my substrate and would like to install a new felt-back sheet flooring. Why must 80% of the original substrate be showing through?

April 26, 2017adhesive existing felt-back flooring install Residue Sheet Substrate

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I have existing adhesive residue on my substrate and would like to install a new felt-back sheet flooring. Why must 80% of the original substrate be showing through?

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All flooring expands and contracts. When a new flooring is installed over existing adhesive residue, it expands and contracts as usual, and can actually move the existing adhesive residue. Depending on the bond of the adhesive residue to the substrate, the flooring may pull away from walls and apart at seams.