Q–I just finished reading your interesting article on windows, and felt obliged to write you.
If I were to use the window channel kits you describe, do you know of a local company that will take my old sashes, remove the many layers of old paint, and convert them to Thermopane sashes? I would remove the windows, deliver them to the company that does that type of work, and then reinstall the windows myself.
Secondly, could you tell me of a local company that makes new Thermopane sashes that I could install to replace my old windows?
Bill Parrilli
Chicago
A–It’s highly unlikely that you’ll find a company that’s willing to convert your existing windows into what’s known as “double-pane windows” (Thermopane is a brand name of such a window).
None of the replacement window contractors I talked to would take on such a job, nor would a number of millwork specialists.
“To take an existing sash and rework it to accommodate two panes of glass instead of one would cost more for the labor than the price of a new sash,” says Ronald Bloch of the Dettmers Co., a millwork firm on Chicago’s North Side. “And often times, existing windows need to be rebuilt where the wood has rotted out, and that adds to the cost.”
Also, if you removed the windows, you would have to temporarily board up the window openings with plywood until they were reinstalled.
Because of the cost factor, there’s really no reason to consider converting the existing windows, unless they happen to be architecturally significant. Often, it’s not the window’s wood that people care about, it’s the glass. Such may be the case with stained- or leaded-glass panels.
Unless that’s the case with your house, think of getting new dual-pane sashes.
There are literally dozens of companies–including window contractors and millwork companies–that will make them for you. A good company isn’t hard to find. As when searching for any home improvement firm, start by asking friends or neighbors who have had similar work done for a referral.
Then, get several bids for the work. Of the companies we talked to, estimates for a replacement 3-by-5-foot, dual-pane double-sash window ranged from $150 to $1,500. Something in the middle of that sounds reasonable. Also, ask the contractor for referrals of other customers.
Here’s what to expect for your money:
The contractor will begin by measuring your existing windows. Then, you’ll be able to determine if you can buy a stock size replacement window or if you’ll have to have a custom replacement window built. The custom window can be more expensive.
Next, the old window will be removed and the replacement window installed. If you have nice wood trim around the window, make it clear to the contractor that you want that to stay.
The existing weights, pulleys and chains will be discarded because most replacement windows come with their own window channel kit. Make sure the window cavities are stuffed with insulation to help seal the opening.
Most replacement windows are made from a clear white pine. On the inside, it will be up to you to stain or paint them to match the existing trim and woodwork in the room. The exteriors of the windows are usually primed (you’ll need to paint them) or clad in aluminum.
As mentioned in previous columns, the dual-pane windows will immediately start to save you energy dollars as the drafts disappear and you, in turn, crank down the thermostat. Of course, you won’t recoup your investment in the new windows overnight. It will depend on how many windows you replace and how much you spend per window. In the meantime, you’ll enjoy increased comfort.
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