Vinyl Windows (Energy Guard)
Our Energy Guard vinyl windows — welded frames and heat-fighting glass, made in Dallas and installed by the maker.
Learn more →Dallas-Made Windows · Since 1992
Dallas-Made Windows Since 1992
Vinyl, aluminum and fiberglass windows made in Dallas since 1992 — plus casements, double hungs and doors. Free estimates in Dallas and Fort Worth.
- Made in Dallas since 1992
- J&M Glass Company, Inc.
- Free estimates
- Dallas · Fort Worth
The Factory Is the Store
Most window companies are sales organizations with a supplier behind them. Thermal Windows is the supplier: a Dallas factory (J&M Glass Company, Inc.) that has designed, built and installed its own windows since 1992 — three window lines engineered for Texas heat, made at 8808 Empress Row, installed by the same company's crews.
That is why our customers' letters read the way they do — pleasant from the first call to the check, respectful installers, and summer electric bills that fall. Browse the lines, read the letters, and call (214) 630-5885 in Dallas or (817) 731-8886 in Fort Worth for a free estimate.
Our Services
All services →
Aluminum Windows (Thermalized)
Thermalized aluminum windows — thermal-break frames with slim sightlines and big-span strength, made in Dallas.
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Fiberglass Windows
Fiberglass windows — the buy-it-once line: glass-stable, rot-proof, slim and strong, manufactured in Dallas.
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Casement & Awning Windows
Casement and awning windows — full-opening ventilation and the tightest seals we build, made in Dallas.
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Double Hung Windows
Double hung windows — the classic American style with tilt-in sashes and modern glass, manufactured in Dallas.
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Entry & Patio Doors
Entry doors and patio sliders — measured, built and installed factory-direct, with locks and glass that do their jobs.
Learn more →Why DFW Homeowners Buy Factory-Direct
Manufacturing Since 1992
J&M Glass Company has made windows in Dallas since 1992 — 34 years of Texas summers engineered into the product.
Three Window Lines
Vinyl Energy Guard, Thermalized aluminum and fiberglass lines — the right material per home, not the only one we sell.
Made to Measure in Dallas
Custom sizes are normal factory work, not expensive exceptions shipped from another state.
Free Estimates, Two Cities
Dallas (214) 630-5885 and Fort Worth (817) 731-8886 — free estimates from the people who build the product.
Recent Work
Full gallery →What Customers Say
“Thank you for the great job you did on our windows. I Love them! The 2 men you had installing were great! They were friendly, helpful and respectful… I'm completely impressed.”
“This was one of the most pleasurable experiences I have had as a homeowner. From the initial call to writing the check your staff was consistently pleasant… Your installation crew took care with my home.”
“…After about 60 days of 100+ degree weather, I just got my August electric bill… $154.37!!!… The only change was my new windows…”
Areas We Serve
Ready to start? Get your free quote today.
Call (214) 630-5885 or send the 2-step quote form — it takes under a minute.