Underlay — Flooring Glossary
Quick answer
Underlay improves comfort, acoustics, and carpet lifespan.
Definition
Foam, rubber, or felt layer between subfloor and floor covering.
Explanation
Carpet underlay is graded by tog and density. Laminate underlay includes moisture barriers on concrete.
Summary
Order underlay from the same net area as the floor plus waste.
In depth
Underlay in practice
A deeper look at Underlay for UK carpet and hard flooring jobs.
Where you will encounter this
Carpet underlay is graded by tog and density. Laminate underlay includes moisture barriers on concrete.
On surveys, use the correct term with customers — it builds trust. On quotes, reference prep or materials tied to this term so scope is clear.
Fitter tips
Order underlay from the same net area as the floor plus waste.
If this term appears in a supplier specification or building control note, photograph it and attach to the job record so fitters on site see the same requirement.
- Explain in plain English on customer-facing quotes
- Train apprentices using photos from real jobs
- Link related calculators when ordering materials
Related estimating notes
When "underlay" is flagged on a job, check whether your default waste, labour day rate, or prep line items need adjusting — generic room calculators may not include specialist work.
Related resources
Automatic internal links for calculators, guides, glossary, and directory pages.
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