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.
While most insulation works by slowing heat flow, the basic principle of radiant and reflective barriers is that they reduce radiant heat gain instead of slowing it. For example, as the sun bears down on your roof, the heat transfers through the material radiating into your attic and warming it. While normal insulation slows this heat transfer process, reflective or radiant barriers reflect and absorb to keep the area tepid.