Laying out the Ba-gua with each qua in it's correct direction creates the concept of a large square with 3 by 3 smaller squares within the larger. These boxes are the 'building blocks' of Feng Shui; forming the road map (the ba-gua).
Thermostat Â® radiant barrier plywood sheathing reflects up to 97% of the sun's radiant heat from a homeâs attic and can help lower attic temperatures and improve energy efficiency.deal for residential and light commercial construction. 1  ThermostatÂ® Radiant Barrier Sheathing (Plywood) ThermostatÂ® radiant barrier plywood sheathing reflects up to 97% of the sun's radiant heat from a homeâs attic and can help lower attic temperatures and improve energy efficiency.
Some builders use two layers of sheathing  plywood or OSB for structural support and a seam-staggered layer of rigid foam for insulation. When the total depth of the sheathing material exceeds 1/2 inch, make certain the window and door jambs are adjusted for the total wall thickness. cost-effective way to increase the R-value of exterior walls, while also providing moisture control, is to use insulated foam sheathing instead of wood sheathing. To learn more about best practices for wall insulation, download a fact sheet from the DOE website.