About Thermal Windows

Thermal Windows is the window brand of J&M Glass Company, Inc. — a Dallas manufacturer and installer making windows in this city since 1992. That combination is rarer than it sounds: most window companies sell what a factory somewhere else makes. Thermal Windows designs, builds and installs its own — vinyl Energy Guard windows, Thermalized aluminum windows, fiberglass windows, casements, double hungs and doors — from 8808 Empress Row, Dallas.

Thirty-plus years of Dallas summers is the R&D department. The customer letters on our Reviews page tell the story better than specs: installers who were 'friendly, helpful and respectful,' a process 'consistently pleasant' from first call to final check, and one August electric bill that dropped to $154.37 after about 60 days of 100+ degree weather — 'the only change was my new windows.'

Two numbers cover the metroplex: Dallas (214) 630-5885 and Fort Worth (817) 731-8886. Estimates are free. When you call, you are calling the factory — the people who answer are the people who make and install the windows.

How We Work

• Dallas manufacturer & installer — since 1992
• A J&M Glass Company, Inc. brand
• Vinyl, aluminum & fiberglass window lines
• Free estimates — Dallas (214) 630-5885 · Fort Worth (817) 731-8886
• 8808 Empress Row, Dallas, TX