In addition to having double or triple insulated glass, along with other performance options such as Thermal E+™ and tinting, a Thermalized aluminum windows offers another important feature. The window frame and sash frames are insulated against heat and cold conduction. This is done by separating the outside metal parts from the inside with a material such as polyurethane, greatly reducing the amount of heat or cold transferred through the frames. This feature is known as a thermal break or thermal barrier.
• 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 weatherstripped 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!
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 a Thermalized windows show excessive moisture, you can be sure that moisture is also present in your walls and ceiling.
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
Dallas Showroom & Manufacturing Plant J&M Glass Company, Inc. 8808 Empress Row Dallas TX 75247 (214)630-5885
Fort Worth Showroom J&M Glass Company, Inc. 3461b Blue Bonnet Cir Fort Worth TX 76109 (817)731-8886
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