How much does a sliding glass door cost to replace?
Typical ranges, repair vs. replace, and what to look for in a new patio door.
INSULATIONWhat is a radiant barrier, and does it work in Texas?
Short answer: yes, a radiant barrier can help in Texas, but it's a supplement to attic insulation, not a replacement for it. The U.S. Department of Energy says radiant barriers work best in hot, sunny climates, and that some studies show cooling cost savings of about 5% to 10%. They help most when your ductwork runs through the attic.
What is a radiant barrier?
A radiant barrier is a reflective material, usually aluminum foil bonded to a backing, installed in the attic to reflect the sun's radiant heat back toward the roof. Insulation works differently: it slows heat moving through materials. A radiant barrier reflects heat instead of absorbing it.
Does a radiant barrier work in North Texas?
Our long, sunny summers are where radiant barriers do the most good. DOE notes they're more effective in hot climates than cool ones, and more valuable when there are ducts in the attic. The barrier keeps the attic air and surfaces around those ducts cooler.
Radiant barrier vs. more insulation: which comes first?
For most DFW homes, air sealing and bringing attic insulation up to the recommended R-49 comes first. That's what keeps heat out of your living space. A radiant barrier is a good next step for homes with attic ductwork or a very hot attic. How much attic insulation you need
Types of radiant barrier
- Foil stapled to the rafters in an existing attic, foil side facing an air space
- Radiant barrier roof decking, which has the foil bonded to the plywood or OSB, typically installed with a new roof
- Reflective insulation, which combines a foil facing with insulation
How to install it right
- Don't lay foil on top of attic floor insulation. DOE strongly recommends against it, because dust collects on the foil and moisture can get trapped in the insulation.
- Leave an air gap. The reflective side has to face an air space. DOE suggests at least 1 inch between foil and roof when it's draped between rafters.
- Keep it away from wiring. Foil conducts electricity.
- Follow code and the manufacturer's instructions, or use a certified installer.
Home energy savings calculator
What could attic insulation save you each month?
Enter your square footage, windows and doors for a quick, broad estimate.
The bottom line
In North Texas, a radiant barrier is worth considering, especially with ducts in the attic. Seal and insulate first, then add a radiant barrier for the extra edge. Comparing your options? Read spray foam vs. blown-in, or see how we handle attics.
Sources: U.S. Department of Energy, Energy Saver: radiant barriers; ENERGY STAR, recommended home insulation R-values.
