Spray Foam vs Fiberglass: What Actually Works in Texas Heat
This is one of the biggest questions homeowners ask.
So let’s break it down.
Fiberglass Insulation
Pros:
-
Lower upfront cost
-
Widely used
Cons:
-
Does NOT stop air movement
-
Performance drops in extreme heat
-
Can leave gaps and inconsistencies
Spray Foam Insulation
Pros:
-
Air seals AND insulates
-
Higher performance in Texas heat
-
Expands to fill gaps and cracks
Cons:
-
Higher upfront investment
The Real Difference
Fiberglass slows heat.
Spray foam stops air movement and heat transfer together.
That’s a big deal in Texas.
Where Fiberglass Falls Short
If your home leaks air (most do), fiberglass can’t fix that.
Which means:
-
Less comfort
-
Higher energy bills
-
More strain on your system
When Spray Foam Makes Sense
-
New construction
-
Attic upgrades
-
Homes with comfort issues
-
Long-term performance goals
Bottom Line
Fiberglass has its place… but if you want real performance, spray foam is hard to beat.
👉 Not sure what your home needs?
We’ll help you figure it out without the sales pitch. Reach out to LoneStar Air Sealers.