New Windows and Doors Save You Energy and Money

There are several features to look for in a new wind0w that will make it more energy efficient.  The distance between the two panes of glass should be about 5/8″.  If it is either smaller or larger than that, more heat will transfer through the window.

A nonmetallic spacer between the two panes of glass is more resistant to heat transfer than aluminum or stainless steel.  This nonmetallic spacer is typically the “Super Spacer” brand.  Some window manufacturers refer to it as “warm edge technology.”  It is a high-density polymerized foam that looks and feels like soft rubber.

Weather stripping
Weather stripping is important too – the more the better.  A few windows have 3 separate weatherstrips.  Look to see if the weatherstrip is fused in the corner.  If not, the window could become drafty if the weatherstrip shrinks a little overtime.

Insulation method and material – closed cell foam superior to traditional fiberglass
The method of insulation is important too.  For most of the last 50 years woven fiberglass has been used between the window frame and the wall framing.  Most of the time the space was too narrow to allow proper placement of the insulation.  It typically was stuffed into the space, getting compressed in the process and subsequently losing most of its insulating qualities.  Fiberglass insulation allows air to pass through it too, which often results in cold drafts around the window.    A far superior method is to use spray-in closed cell foam around the window frame.  It is an excellent insulation material, and will completely seal against air leaks and humid air intrusion into the wall cavity.

U-Value, Solar Heat Gain And $1500 Tax Credit
The overall u-value and solar heat gain coefficient both have to be .3 or less for the window or door to qualify for the tax credit.

Langerman Exteriors has been a window, siding, roofing contractor in the greater Twin Cities area of Minnesota for over 40 years.   With our 40 years of hands on personal experience, we are knowledgeable in the details of all areas of remodeling.

Contact us at 763-493-0058 for a free home inspection today!  Let us show what we can do for you!

Check www.efficientwindows.org for more information on what qualifies for the tax credits

See Window Selection for a complete guide to energy savings for  window products in your city or region.  This will give you an idea of how you can save cost when you replace your windows with energy efficient windows.  It will be worth your money.