It’s a fact of life that summer in Arizona is HOT. It’s hot in the sun, hot in the shade, hot in the early morning, and hot in the dark of night. We use air conditioning, fans, water and shade to stay comfortable. But when it comes to keeping your home it’s coolest, it’s good to know which heat you are fighting.
Conduction is heat transferred through a surface. Much like cooking on a stovetop, areas of your home get hot because aluminum window frames, single pane glass, and walls with a lot of sun exposure carry the heat to the inside of your home. Products such as dual pane windows, non-conductive window frame materials and honeycomb blinds can act as insulators to prevent the heat from getting through.
Convection is heat transferred in the form of hot air moving around or flowing toward cooler spaces. Properly sealed windows and doors help prevent hot air from the outside flowing into your home.
It may surprise you that these two types of heat actually account for only 5-7% of heat gain in the summer! Your fiberglass or cellulose attic insulation are good at absorbing these types of heat, but are much less effective against radiant heat.
Radiant heat (radiation) is caused by UV rays, which actually pass through many solid or insulated surfaces. Combined with a poorly ventilated space, temperatures caused by radiant heat often exceed the outdoor temperature. It is most noticeable in the attic where temps can reach as high as 150 degrees.
Radiant Barrier insulation was developed from the same technology used by NASA when creating the space suits for the astronauts. The concept has been used for decades in a variety of different products and applications.
R&K uses a Radiant Barrier product with significant advantages. This paint-like low-e coating is sprayed on the underside of your roof, and provides complete coverage even in oddly-shaped or small spaces. Your entire roof becomes a reflective barrier that bounces those UV rays back into the atmosphere. Attic temps drop up to 20 degrees, which in turn helps your heat-absorbing insulation work more effectively, and puts less strain on your HVAC system.