If you are planning to construct a new home or renovating your old home, one important job you can do is installing underfloor insulation. At the beginning of construction, the builder should ask all subcontractors to keep spaces between floor joists clear. Underfloor covering increases the energy-efficiency of a building. You can also look for high-quality wall insulation products via various online sources.
Image Source: Google
Let the ductwork, electrical wiring, and drain lines run under the insulation, to install a continuous covering layer. If you stay in a region that has freezing winters, supply plumbing is present inside the lining, to increase the protection.
Seal all air leaks in the crawl space and the home's air-conditioned area. The most troublemaking leaks are penetrations for ductwork, plumbing and electrical wiring, plenum for ductwork, and holes around drain lines and bathtub drain.
Insulate the band joist space between the floor and air ducts, as the space permits. Use insulation hangers and place them at a space of 12 to 18 inches from each other, for holding the floor insulation properly. This will prevent the lining's getting compressed over 1 inch.
The vapor barrier's orientation should depend on the climate and place of your home. Mostly, the vapor barrier faces up. However, in regions with hot summers and mild winters, the vapor barrier should face down.
Close the crawl space vents after making sure that the construction materials inside the crawl space and the crawl space area are clean. To cover truss floor systems, consider installing foam board insulation or netting to the floor trusses' underside. Then, fill the resultant space within the insulation or netting and the sub-floor using loose-fill insulation.