Buttoning Up Your House

19 Oct

Metro®Boston, Publication Date: October 19, 2011
Expanded Content

By Attorney George Warshaw

Winter is approaching and the most vulnerable location of energy leakage and wasted dollars are drafty windows. It may be time to replace them.

To learn about replacement windows I spoke with certified master installer Fred LaCorte, of Climate Door & Window, (781-681-7007; climatedoor@verizon.net).

“For most people the first choice is usually whether to get single, double or triple pane windows. Single pane windows offer little or no energy loss protection. Double and triple pane obviously provide more protection, much in the way adding a thin liner into your winter gloves keeps your hands warmer,” Fred told me.

“Homeowners in choosing a window can increase their energy efficiency and save money in two ways. The first by placing a coating on the window; the second, by using a gas to create an insulation barrier.

“lowE is a coating placed on the glass that reflects radiant warming heat back into the atmosphere during summer months, while allowing the sun’s heat to penetrate into the house during the winter months, thus keeping the house warmer when it’s needed most. It also provides UV protection for furniture and carpets.

“Some double and triple pane windows have a layer of argon gas added between the panes,” Fred explained.  “Gas acts like an installation barrier and prevents heat loss in the winter and air conditioning loss in the summer.”

For the consumer, there are a number of measures that rate windows and decipher the mystery. You should find stickers on the windows that provide numerical information rating the energy efficiency of the glass. The lower the number the better.

Glass is rated by “U” value and a solar value called SHGC (solar heat gain co-efficient). For solar SHGC ratings, look for .35 or below. For U value look for .30 or less.

Here’s an example. Double pane without a lowE glass coating have a U value of about .44; with lowE glass coating around .35. Adding an argon gas barrier to a lowE coating drops the U value to around .30.

Triple pane, with double lowE brings have a value of around .20.

Not all windows are built with the same durable construction. A replacement window typically goes into an existing wood frame and is made of vinyl.  More durable windows are made of a composite, have a more rigid frame, and last longer.

Design Pressure measures the ability of a window to withstand flexing and energy loss due to wind velocity. Design Pressure uses numbers such DP 35, DP 50. The higher the number the better it can withstand stronger winds and flexing.

Lastly, don’t forget insulation. If you’re replacing the usual double hung window that used pulleys and ropes to raise and lower the window, make sure that insulation will be stuffed in the pockets where the ropes were used – otherwise the air will just channel around the window.

Home Depot, Lowe’s or the Independent Company

I’ve found the level of expertise more reliable with smaller, local companies than the big chains that merely offer a list of subcontractors. Smaller companies are more accountable and responsive if you’re unsatisfied with the work that was done.

 © 2011 George Warshaw. All rights reserved.


George Warshaw is a real estate attorney, estate planner and author. He represents buyers and sellers of homes and condos in Massachusetts, and prepares wills, trusts, prenuptial agreements and estate plans. George welcomes new clients and questions at george.warshaw@warshawlaw.com.

Legal Advice: Laws, and court decisions interpreting them, change frequently and this article is not updated as laws change. The content and information contained in this article is neither intended as legal advice nor shall establish an attorney-client relationship. Before making any legal decision, consult an attorney to see how or if the foregoing may apply to your circumstances.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: