We are occasionally asked if antique pine flooring is a good choice over radiant heat. Over the years our customers have had many successful installations over this heating system. There are general guidelines such as turning on the heating system in advance for several days to make sure that there is no excess moisture in the subfloor. Also the temperature of the subfloor should not go above 85 degrees F. Wider boards are prone to show larger gaps in the heating season. Vertical grain flooring moves less than select grain flooring. As with any installation starting with properly milled flooring and exercising care to get the moisture content of the flooring (and the job site) correct go a long way towards getting an antique heart pine floor which looks good for years and years. The NWFA has also developed guidelines for installing wood floors over radiant heat see Installation Guidelines, Appendix H.