Resilient Flooring

Installing Vinyl Stair Treads and Risers

Conditioning, scribing, adhesive choices, nose filler and rolling for vinyl and rubber stair treads and risers, based on Roppe's instructions.

Updated · 2 min read

Stair treads take more abuse than any other part of a floor, and a loose nose is a trip hazard. A good tread job comes down to three things: a tight scribe, full adhesive coverage, and a filled, bonded nose. The specifics below follow Roppe's tread and riser instructions.[1] Check the sheet for the tread you're installing.

Before you start

Treads installed on a cold or damp stair are the ones that come loose.

  • Keep the space at 65 to 85°F and 40 to 60% RH for 48 hours before, during and after installation.[1]
  • The steps must be clean, smooth, flat, structurally sound and permanently dry. Wood steps must not exceed 8% moisture content.[1]
  • Check that the step's nose profile matches the tread. If it doesn't match, stop. Roppe doesn't recommend continuing.[1]
  • Clean mold release off the back of the treads with a white rag and denatured alcohol, changing rags often.

Measure and scribe

A tread that's cut to fit snugly without forcing is what keeps edges from lifting.

  1. Mark a center line on the riser and on the tread.
  2. Scribe each end to the stringers with dividers, leaving a slight undercut so the tread goes in easier.[1]
  3. Set the depth with a spacer and scribe the back edge.
  4. Dry-fit. The tread should sit snug against the stringers without compressing the material.[1]

A stair gauge speeds this up on long flights.

Fill the nose

The gap between the tread nose and the step nose is where treads crack and break.

  • Roppe requires epoxy nose filler if the gap is greater than 1/4". For vinyl treads it's required on every installation.[1]
  • Run a 1/4" to 1/2" bead, stopping 1/2" to 3/4" from each end of the step nose.
  • If the gap is 1/2" or more, the step needs other prep before the tread goes on.

Adhesive options

Roppe lists several adhesives, each with a different wait before traffic. All call for 90% coverage on both surfaces.[1]

Adhesive (Roppe) Light traffic after
AW-510 tread adhesive 24 hours
U-705 urethane 8 hours
EW-710 epoxy 12 hours
C-631 contact adhesive Immediate

Install and roll

Work from the top of the flight down so you aren't walking on fresh treads.

  1. Apply nose filler and adhesive as above.
  2. Set the tread, pressing the nose in first, then the field.
  3. Hand-roll within 30 minutes and check that the tread hasn't shifted and adhesive hasn't squeezed out.[1]
  4. Install the riser after the tread below it. For an overlapped seam, trim the riser to 1/4" to 1/2" from the top of the step.
  5. Trim abrasive inserts 1/16" back from each end.

Common mistakes

Most tread failures start at the nose.

  • Skipping the nose filler. The unsupported nose cracks under traffic.
  • Carrying long treads over your shoulder. It stretches the inserts.[1]
  • Forcing a tight tread. Over-compressed treads buckle.
  • Leaving the nose unbonded. Every nose (leading edge) must be adhered.[1]

Treads and tools we carry

These are the treads and the tools for measuring and setting them.

References

  1. Roppe: Stair treads, risers and nosings installation

Linked PDF documents are archived copies saved by PreFloor Tools so they stay available if the publisher moves or removes them. Check the publisher's website for the latest revision.

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