Week 25, Day 6 Posted on 2016-04-09 by dMb Reply Week 25, Day 6: Another working Saturday, getting ready for the concrete slab on the ground floor Underfloor heating pipe installation Electrical floor box installation Air-tight taping the damp proof membrane under the concrete Week 25, Day 6 Completed Underfloor Heating pipework in Open-Plan Area Completed Underfloor Heating pipework in Hallway Underfloor Heating Manifold Electrical floor box, one of two in the Open-Plan Area Electrical floor boxes in Living Room Air tight pipe grommet