Wood flooring and underfloor heating

Engineered wood flooring can perform very well over underfloor heating, but the complete floor build-up must be designed and commissioned correctly.

The heating elements should sit comfortably within an even depth of screed, allowing them to warm the screed consistently before the heat reaches the timber above. This helps distribute temperature evenly across the floor and reduces the risk of localised hot and cold spots, which can place unnecessary stress on natural wood.

The flooring construction is equally important. A well-manufactured engineered board uses a stable plywood or engineered core to help control the natural movement of the hardwood surface. However, not all engineered flooring is made to the same standard, so the quality of the timber, core construction, bonding adhesive and board dimensions should all form part of the specification.

We generally do not recommend solid wood flooring over underfloor heating because it is more susceptible to movement as temperature and humidity change.

The system should be commissioned gradually, with temperatures raised and lowered in controlled stages rather than through sudden changes. The finished floor surface temperature should not exceed 26°C, unless a specific flooring manufacturer provides different written guidance.

Stable indoor humidity, correct subfloor preparation, a suitable flexible flooring adhesive and consistent temperature control all contribute to long-term performance. When properly specified, the heating system should warm the screed evenly, the screed should warm the floor evenly, and the timber should be allowed to respond gradually to its environment.