The sheet vinyl material itself has very little strength. If cheap underlayment, like low-quality plywood is used, it may result in spongy spots where there are voids between the layers.

The spongy areas of your floor might be traced to substandard or unapproved underlayment. Many lumberyards sell overlay-grade lauan plywood for sheet vinyl underlayment.

If your kitchen floor is sheet vinyl and the dining room is carpet, don’t forget that the sheet vinyl will have a 1/4-inch underlayment beneath it, but the carpet won’t.

Our round-up of the best vinyl flooring brands includes the best vinyl plank flooring for pets as well as basements, ...

A: Floor underlayment is a general term to describe a sheet of material that rests on the subfloor and below the finish flooring. Underlayment can perform one or more of several functions ...

The sheet vinyl material itself has very little strength. If cheap underlayment, like low-quality plywood is used, it may result in spongy spots where there are voids between the layers.

Dear James: I want new sheet vinyl flooring in my kitchen. The last one cracked too quickly. What should we do to be sure this does not happen this time it’s installed? — Betsey G.

Sheet vinyl flooring comes in 12-foot-wide rolls, resulting in seamless coverage in all but the very largest rooms. Prices start at about $2 per square foot.