Why Houston's Climate Is Unique for Windows
Houston has one of the most demanding climates for windows in the United States. What works in Minnesota won't work here — the combination of extreme heat, high humidity, and hurricane-season rain requires a specific set of window features.
The #1 Feature for Houston: Solar Heat Gain Coefficient (SHGC)
In cold climates, you want windows that let heat in (high SHGC). In Houston, you want the opposite — windows that block solar heat while still admitting daylight.
"SHGC matters more than U-factor in Houston. We're not worried about keeping cold out — we're fighting to keep heat out."
Look for SHGC of 0.25 or lower for south and west-facing windows. This single spec will do more for your energy bill than any other upgrade.
Low-E Glass: Non-Negotiable in Houston
Frame Material: What to Choose
Vinyl frames are the right choice for most Houston homes — won't rot in high humidity, doesn't conduct heat like aluminum, low maintenance, and most affordable.
Fiberglass is a premium option — more dimensionally stable in extreme heat. Worth it for high-end homes.
Avoid aluminum for residential replacement. Aluminum conducts heat aggressively — a real problem in Texas summers.
ENERGY STAR Certification for Houston
ENERGY STAR windows for the South-Central climate zone must meet U-factor ≤ 0.40 and SHGC ≤ 0.25. Any window meeting these specs qualifies for the IRS 25C tax credit — 30% back, up to $600/year.
Our Recommendation for Houston Homes
The sweet spot for most Houston homeowners:
- Vinyl frame (double-hung or casement depending on your home)
- Double-pane Low-E glass with argon fill
- SHGC ≤ 0.25 for south/west-facing windows
- ENERGY STAR South-Central certified
This combination delivers excellent energy performance at a reasonable price point and qualifies for the federal tax credit. Questions about your specific home? Call us at (713) 819-7597 — we'll tell you exactly what your house needs.
