Any thermalized aluminum window’s performance is equal to or better than well-made wood windows.

Thermalized aluminum windows surpass strict industry specifications. Air leakage with a 25 MPH wind blowing outside cannot exceed 0.375 cubic feet per minute (CFM) for every foot of weather-stripped window perimeter. Our 700 Series Double Hung allows only 0.06 CFM air infiltration – one sixth of the industry standard! Old, worn out windows often have rates of 1.5 or more, 25 times the air leakage of our best Thermalized aluminum windows!

Do Thermalized windows prevent condensation?

No window is condensation-proof. Even walls will “sweat” under high humidity. Windows do not cause condensation; they simply prevent moisture from escaping and provide a surface that allows condensation to be readily seen. If inside glass and frame surfaces on Thermalized window show excessive moisture, you can be sure that moisture is also present in your walls and ceiling.
What is the recommended interior humidity level?

The maximum recommended interior relative humidity ranges from 15% at -20ºF to a maximum of 40% at +30º. Many homes have been built “tighter” to conserve energy, leading to indoor humidity above the recommended levels. The best way to handle high indoor humidity is to vent the moisture to the outside. Bathrooms, kitchens and laundry areas should be vented with a fan, or by opening windows slightly when the areas are in use. If that does not help, a dehumidifier might be necessary.

Contact us today at (214) 630-5885 or (817) 731-8886 to learn more about our single hungwindows or click here for our online form.

Dallas / Fort Worth’s #1 Source for Double Hung Windows J&M glass Thermal Windows manufacturing is conveniently located in both Dallas and Fort Worth so if you are looking for Vinyl Windows in Dallas, or Vinyl Windows in Fort Worth J&M is a smart, local choice.

Please visit us:
Contact Us
Dallas Showroom & Manufacturing Plant
J & M Glass Company, Inc.
8808 Empress Row
Dallas TX 75247
(214) 630-5885
http://www.thermalwindowsdfw.com