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Current Board Posts

  • Thursday October 30, 2014

    Reliabilt Windows

    trying to get more info on Reliabilt 3201 windows. Rated highly in Consumer Reports. Built by...

  • Thursday October 30, 2014

    Steel Lintels

    On a pocket install in a brick home are you capping the steel lintels or leaving exposed? I have done both but...

  • Thursday October 30, 2014

    Full Frame vs Pocket Replacement

    I have similar quotes for pocket (with Sunrise windows) and full frame replacement (with Great Lakes Lifestyles windows). The fellow quoting the pocket...

  • Thursday October 30, 2014

    Great Lakes Lifestyles window?

    Can someone please comment on the quality of the (Ply Gem) Great Lakes Lifestyles window?...

  • Monday October 27, 2014

    Window suggestion

    Hi, I was I believe previously registered here but can't remember my old username so had to re register under a new...

  • Thursday October 23, 2014

    Sunrise Essentials?

    I live in North Carolina and am planning on replacing the windows in my brick house (22 windows). Balancing costs and quality,...

  • Tuesday October 21, 2014

    Window Installation: Spray Foam

    In considering window contractors, is it considered a "red flag" if a contractor indicates they do not use spray foam on their installs...

  • Tuesday October 21, 2014

    Quaker Windows

    Has anyone heard of or used Quaker windows? A local company wants to sell these windows to me. Spec wise the...

  • Friday October 17, 2014

    Zen equivalents

    I contacted Soft-Lite, and they provided a dealer that offers Zen windows, which I'm told is the private label for Soft-Lite. While...

  • Thursday October 16, 2014

    Energy Wall by Polaris?

    I have been researching windows for awhile now and I just came across the energy wall window which I believe is made by...

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Do it Yourself- Replacement Window Video

 

Vinyl Replacement Window Glass

 

Layers of Glass and Air Spaces

Replacement Windows Rating

Single-pane. This has very little insulating value with (approximately r-1). It provides only a thin barrier to the outside and can account for considerable heat loss and gain.

Double-pane. To improve a window's energy efficiency the number of glass panes in the unit is doubled, because multiple layers of glass increase the window's ability to resist heat flow.

Triple Pane. These windows create an even more energy efficent window often with gas sealed in the frame. Triple Pane will add weight and expense to the window. They are used for northern climates and soundproofing near airports and highways.

Types of Glass

There are various types of glass manufacturers use in constructing windows.

Clear glass has been the primary material available for window panes in homes. However, in recent years, the market for glazing--or cutting and fitting window panes into frames--has changed significantly. Now several types of special glazing's are available that can help control heat loss and condensation.

Low-emissivity (low-e) glass. This has a special surface coating to reduce heat transfer back through the window. These coatings reflect from 40% to 70% of the heat that is normally transmitted through clear glass, while allowing the full amount of light to pass through.

Heat-absorbing glass. This contains special tints that allow it to absorb as much as 45% of the incoming solar energy, reducing heat gain. Some of the absorbed heat, however, passes through the window by conduction and re-radiation.

Reflective glass. This has been coated with a reflective film and is useful in controlling solar heat gain during the summer. It also reduces the passage of light all year long, and, like heat-absorbing glass, it reduces solar transmittance.