The document discusses J&M Glass Company, a Dallas-based window manufacturer that produces thermalized aluminum windows. Thermalized windows have frames insulated from heat and cold transfer through materials like polyurethane. This provides greater insulation than standard aluminum windows. J&M's thermalized windows meet strict industry standards with lower air leakage and heat transfer rates than other windows. However, no window can completely prevent condensation in high humidity. J&M maintains its own installation department to expertly install their window systems.

1. You Want BBB Accredited Window Repair Company
in Dallas?
Thermal windows (J & M Glass Company) make your replacement windows
right here in our Dallas, Texas factory. When you come into our
plant/showroom you will see the quality and attention to detail that has
made us “America’s Finest Window” since 1992. We offer vinyl replacement
windows, thermally broken aluminum replacement windows, and fiberglass
replacement windows at factory direct prices. We offer our entire windows
ready for new construction as well as for retrofit.
What is a Thermalized aluminum window?
In addition to having double or triple insulated glass, along with other
performance options such as Thermal E+™ and tinting,
a Thermalized window 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.
How does a Thermalized window perform?
Thermalized windows are manufactured from close-tolerance aluminum
extrusions. All of our thermal barrier aluminum frames are heat strengthened
by bringing the raw aluminum up to a T5 temper to increase both strength
and rigidity.
This allows us to build extremely large windows without affecting
performance like most aluminum windows. They have lower air leakage and
higher resistance to heat transfer than non thermal break windows. With
double glazing, they will stop 26% to 38% of the heat lost through
comparable wood windows made at local millwork shops.
A thermalized aluminum window 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

2. 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.
About Author
We are the only window manufacturer in the Dallas-Fort Worth area that
maintains our own in-house, full time, and installation department. Our
installation department is one of the most experienced and knowledgeable in
the industry, fully trained to expertly install our window systems into almost
any opening. No one installs vinyl replacement windows and thermally
broken aluminum replacement windows with more precision than our
installation pros! We control the design, manufacturing, sales, and
installation of your windows and back up our work with one of the strongest
limited lifetime warranties in our industry!
Contact Us
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
Find out more on www.thermalwindowsdfw.com