I'd like to insulate the crawl space under my houseWhen using the small rods to hold the insulation in place do I put the rods tite against the sub floor or is it better to put them in at the bottom of the joists?
Knob and tube, assuming you have pictures to illustrate the parts, was used when insulation for wiring was fairly sensitive to abrasionrubber and cloth coveringsThe porcelain insulators kept the wiring from touching wood or other conducting surfaces that might also catch fireThe knobs were high enough from a surface that if all insulation broke, or wore off, the wiring was safely attached to the porcelain far away from an easy short circuitThe tubes were long enough that if the wiring was abraided the tubes kept the bare wire within the insulated tube, once again, far from an easy short circuit or fire starting situationWires were usually connected by wire wraps and solderingTaped with cloth friction tape
no not tight to sub floor, this will compress ur insulation and reduce the R-value of the insulation.install the insulation and then ease the rods in and we push them up half way and then rotate them down so the arch is downward.u want a 1 inch air space between the top of the insulation and the bottom of the sub flooranother good idea is to forget the rods and install a mesh that is made and it staples over the floor joist to hold the insulation in.it comes in 3 ft wide rolls by 50 ft longlicgencontractor
