What is the acceptable thickness range for unbacked PVC flooring?

The standard specifies thicknesses of 1.5, 2.0, 2.5, and 3.0 mm, with a tolerance of ±0.15 mm.

How is the dimensional stability of PVC flooring tested?

It is tested by exposing the flooring specimens to a temperature of 80°C for 6 hours in an oven, with a maximum allowable dimensional change of 0.4%.

What does the flexibility test entail?

The flooring is bent over a specified mandrel at specific temperatures (usually 27°C and sometimes 0°C); it must not crack or break.

IS 3462

: 1986

unbacked flexible PVC flooring

CurrentSpecializedSpecificationBIMArchitectural · Flooring, Wall Finishing and Roofing

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This standard specifies the requirements, methods of sampling, and testing for unbacked flexible polyvinyl chloride (PVC) flooring supplied in the form of continuous lengths (rolls) or tiles. It defines critical physical properties including residual indentation, flexibility, curling, and dimensional stability.

unbacked flexible PVC flooring

Quick Reference Values

standard thicknesses1.5, 2.0, 2.5, and 3.0 mm

tolerance on thickness±0.15 mm

tolerance on length width tiles±0.5 mm

residual indentation max0.15 mm

dimensional stability max change0.4 percent

curling max2.0 mm

Practical Notes

Unbacked PVC flooring requires a completely smooth and level subfloor, as it is prone to 'telegraphing' underlying imperfections.

Material should be unrolled and acclimatized in the installation environment for at least 24 hours prior to laying to minimize dimensional shifts.

Proper adhesive selection is vital to prevent plasticizer migration which can cause the PVC to shrink, harden, or detach over time.