Underfloor heating and wood flooring are both on nearly every renovation wish list, and they can live together well. They can also produce gapped, cupped, creaking floors within a year, and the difference is decided before the first board is opened.
Why engineered boards get specified
Wood moves with heat and moisture, and a heated floor cycles both. Solid boards move as one thick piece of a single species, and over heating that movement shows up as gaps in winter and pressure in summer, which is why most manufacturers and most fitters will not warrant solid wood over underfloor heating. Engineered boards put a hardwood wear layer over a plywood core whose alternating grain resists that movement, and that construction, not the surface species, is what makes them the standard answer here.
Thickness cuts both ways: a thicker board feels more substantial underfoot but insulates the room from its own heating. Fitters talk about this as resistance to heat flow, and the practical version is simple: stay within the board manufacturer's stated suitability for underfloor heating and prefer their recommended thickness range rather than the chunkiest board in the showroom.
The temperature rule
The number that matters is surface temperature at the floor, which wood floor manufacturers commonly cap at 27°C. Modern systems hold this with floor sensors and limiters, but the setting has to survive the household: the thermostat cranked on a cold evening is how well-fitted floors get cooked. If the heating installer and the floor fitter never speak, you become the translator, so put them in contact or carry the board's datasheet to the heating firm yourself.
Before the boards are ordered
Three questions settle most of it. Is the heating wet or electric, and has the screed fully dried (new screed holds moisture that will find the wood)? Will the floor be glued or floated, since each has adhesives and underlays rated specifically for heated floors? And does the board's warranty explicitly cover underfloor heating in writing?
Fitters who work with heated floors handle these questions weekly. Among the 1,174 flooring companies listed on this site you can find firms that both supply and fit, or describe the room and the heating system and let the answers tell you who knows this territory.
