Design guide · 4 min read
Polished concrete overlays and underfloor heating: a homeowner’s guide
Planning a Puur PSR floor over underfloor heating? Check substrate suitability, the complete floor build-up, commissioning, movement joints and colour samples.
By Puur Floors · Updated
In brief
Puur’s FAQs describe compatibility with underfloor heating, but your heating system and complete floor build-up still need approval. A typical 6mm PSR overlay is the decorative finish, not a replacement for the supporting screed or heating-system design.
Can a polished concrete overlay work with underfloor heating?
Puur’s published FAQs describe its products as compatible with underfloor heating. Confirm PSR suitability for your specific heating system, supporting substrate and installation conditions with the technical team.
Do not use overlay thickness alone to predict heat output, warm-up time or energy savings. Those depend on the heating design, insulation and complete floor construction.
What floor build-up needs checking?
Give the installer the heating layout and the full floor construction, including insulation, screed or boards and moisture information. Agree substrate preparation and any required commissioning before the overlay is installed.
PSR is typically installed at 6mm. This adds to the existing build-up, so door clearances, kitchen plinths, thresholds and adjoining finishes still need checking.
How should heating and movement be managed?
Obtain written instructions for commissioning the heating, installation conditions and restarting it after the floor is completed. Follow the requirements of both the heating supplier and flooring installer rather than a generic temperature schedule.
Agree movement joints and transitions before installation. The PSR technical documents note the possibility of hairline cracks and natural variation; a continuous visual finish is not a guarantee against movement in the substrate.
How do you choose a colour for open-plan rooms?
Look at a physical sample in daylight and under your evening lighting beside cabinetry, timber and wall finishes. The Visualiser is useful for shortlisting, but it is not a substitute for a physical colour approval.
Puur holds standard-colour samples in stock. A bespoke RAL or NCS sample can be made for a small additional charge credited against a confirmed order.
What should you ask before booking installation?
Ask for the agreed floor build-up, substrate and heating requirements, preparation method, finish and sealer, protection plan and maintenance instructions. Confirm when furniture, cleaning and normal use can begin.
Send Puur the drawings, floor areas and heating specification for project advice. This guide describes design considerations, not a verified installation or a promise of thermal performance.
Sources & technical documents
- Puur Floors product FAQs
- Puur PSR product information
- Puur PSR technical data sheet (SD21)
- Puur PSR specification (SD21)
Product documents can change. Confirm the current specification, finish and installation requirements with Puur before tender or installation.
