It is the most common question in Texas home improvement: Should I invest $5,000+ in Spray Foam, or just pay $2,000 for standard Blown-In Fiberglass? The answer depends entirely on your roof design and your HVAC location.
The Premium
Spray Foam
Sprayed directly against the roof underside (unvented attic design).
- 1. Brings your attic space into the conditioned envelope of the house (attic stays ~80°F).
- 2. Creates an absolute clinical seal against dust and insects.
- 3. Massive ROI if your AC unit and ductwork are located in the attic space.
The Standard
Blown-In Fiberglass
Blown directly over the ceiling drywall floor (vented attic design).
- 1. Leaves the attic space totally exposed to extreme 140°F heat.
- 2. Highly affordable; provides great R-38 stopping power for the living space below.
- 3. If AC is in a closet or garage (not the attic), fiberglass is extremely cost effective.