Double hung versus single hung

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FLwindows
Posts: 3
Joined: Wed Feb 01, 2006 2:34 pm
Location: Oviedo, FL

Double hung versus single hung

#1 Post by FLwindows »

Any advice on differences between above assuming double glazed, low E, argon? Brands readily available here: Hurd, PGT, Simonton, Silver Line. Any other brands recommended highly?

XSleeper
Posts: 80
Joined: Fri Jan 20, 2006 3:57 pm

#2 Post by XSleeper »

As far as air infiltration is concerned, a single hung is theoretically twice as efficient as a double hung. With double hungs, both sashes operate meaning both sashes have the potential to leak air. With single hungs, that possibility is cut in half. You also have less hardware and weatherstripping to go bad. The risk of the window being installed out of square is reduced with a single hung, since the fixed half "should be" square right from the factory. Single hungs are almost fool-proof.... almost.

As far as the glass efficiency, everything would remain the same.

researcher
Posts: 79
Joined: Wed Oct 05, 2005 9:11 am

#3 Post by researcher »

<<As far as air infiltration is concerned, a single hung is theoretically twice as efficient as a double hung. >>

I know i a splitting hairs here, but i think you mean that theoretically air infiltration will be cut by 43%.

harpo
Posts: 19
Joined: Wed Jan 04, 2006 8:48 pm

#4 Post by harpo »

Look closely at single hungs. Some manufacturers use a thinner frame and a narrower glass pack in single hungs. A single hung is the "bargain" window of most manufacturers and more cuts are made beside the top sash not tilting in or moving.

ANOTHER WINDOW GUY
Posts: 243
Joined: Fri Feb 03, 2006 3:28 pm
Location: WISCONSIN

#5 Post by ANOTHER WINDOW GUY »

harpo is right, the single hung is usually a means of getting the price down. I have some that have a three and a quarter inch masterframe with 7/8" glass and are a nice window. I have others with a two and one half inch masterframes and 5/8" glass packs and are really cheap. The air test are the same on the good ones and a little higher on the cheapies.
For an extra few bucks I'd get the double hungs-so much easier to clean. In as far as the difference in energy effieiency it would be very little.

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