This Old House - Season 21 Episode 4 The Billerica House - 4

A full month after our last time on site, the foundation is just being completed, the construction schedule having fallen victim to a three-week soil cleanup process. With the complex, 30-corner foundation walls up, it's time for a proactive termite treatment beneath the slab, using a new class of chemical, that rather than acting as a barrier, allows termites to enter the treated zone unknowingly, upon which they die. Its continuing efficacy in the ground has been proven for seven years and counting. Before the slab is poured, the crew installs an underlayment of 2"" styrofoam insulation and a clip-in system for radiant heat - at half the price it was only a few years ago, Richard insists we put the tubing in every slab we pour, even if it isn't used right away. Then our host takes viewers to a Florida house built by a major insurance company to showcase tips for loss mitgation - everthing from sprinklers to kick-proof door jambs. Back at the site, the slab is poured, and homeowners Di