During a Dallas summer, the sun transfers heat through your roof via "radiation." Standard insulation materials like fiberglass and cellulose don't block radiation; they only slow down "conduction" (the physical transfer of heat). To physically block solar radiation from entering your attic in the first place, you must deploy a Radiant Barrier.
The Science
Emissivity vs Reflectivity
A Radiant Barrier is a highly reflective sheet of foil stapled to the underside of your roof rafters. It has an emissivity of 0.03, meaning it only emits 3% of the heat it absorbs and reflects 97% of the radiant heat directly back out of the roof.
Temperature Drop
-30°F
In Peak Summer
AC Load Reduction
Ductwork operates in cooler air
Lifespan
Lifetime
Never degrades or settles