Can I install vinyl plank over existing sheet vinyl from the 1980s?

Yes, you can often install vinyl plank over existing 1980s sheet vinyl, but the old flooring must be properly prepared and meet specific conditions first.

The key factor is whether your existing sheet vinyl contains asbestos, which was commonly used in flooring adhesives and backing materials through the 1980s. Never sand, scrape, or disturb 1980s sheet vinyl without professional asbestos testing first. If asbestos is present, the safest approach is encapsulation by installing directly over it rather than removal, which requires certified abatement contractors.

Surface preparation is critical for success. The existing vinyl must be firmly adhered with no loose edges, bubbles, or soft spots. Any areas that feel spongy or move when walked on indicate adhesive failure underneath and must be addressed. The surface needs to be thoroughly cleaned and deglossed, and any seams or embossed textures should be filled and smoothed with floor patch compound to prevent telegraphing through the new vinyl planks.

Subfloor evaluation comes next. Even if the sheet vinyl looks fine on top, you need to ensure the subfloor underneath is structurally sound and level within 3/16" over 10 feet. In Ottawa's older homes, subfloors from the 1980s may have settling or moisture issues that weren't apparent when the original vinyl was installed. A licensed flooring contractor can assess whether additional subfloor work is needed.

Height transitions will increase by about 4-6mm with the new vinyl plank layer, so door clearances and transitions to adjacent rooms need consideration. Most quality vinyl planks can handle minor imperfections in the substrate, but proper preparation prevents premature wear and ensures your warranty remains valid.

For a professional assessment of your existing flooring and subfloor conditions, Ottawa Floor Install offers free consultations to determine the best installation approach for your specific situation.

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