1) With water-heated radiant-heat systems, a pressure test must be performed and documented by the system installer prior to beginning the installation of the wood flooring. It is preferable that the system be “up-and-running” when the installation takes place.
2) To minimize the effect that rapid changes in temperature will have on the moisture content of the wood floor, NWFA recommends that an outside thermostat be installed. If one is not present, suggest to the builder that this should be considered, unlike conventional heating systems, which switch on as needed, radiant systems work most effectively and with less trauma to the wood floor if the heating process is gradual, based on small incremental increases in relation to the outside temperature.
3) If the subfloor is concrete and it has cured, turn the heat on, regardless of the season, and leave it on for at least 5 to 6 days to drive out residual moisture before installation of the wood flooring.
4) Radiant heat is a dry heat and a humidification system may be necessary to maintain wood flooring in its comfort zone.