Question
I saw some very attractive, inexpensive interior storm windows. My old windows are ugly and leaky, but I cannot afford replacement windows now. How efficient are storm windows and what type do you recommend? D.H.
Answer - The new designs and materials used for interior storm windows are very efficient, attractive and durable. With the many frame colors and paintable magnetic strips, you often don't even notice the storm windows.At a cost of about 25 percent as much as replacement windows, storm windows are an excellent do-it-yourself alternative. If you air-condition, leave them up all year. It only takes a few mintues to put them up or take them down.
In addition to saving energy year-round and improving your comfort, especially at night, interior storm windows block the sun's rays. I installed a magnetic acrylic storm window under my skylight to reduce fading of my furniture and carpeting.
Good-quality frames and attachment methods are important to realize the maximum savings on your utility bills. If you install the storm windows properly with an airtight seal, you'll notice how much more quiet it is.
A rigid plastic (often vinyl) frame is usually used. The most common glazing materials are clear acrylic (Plexiglas) or polycarbonate plastic sheets. Acrylic remains crystal clear for years. Polycarbonate (bulletproof glass) is more expensive, but virtually unbreakable.
The primary difference among the various storm windows is the method by which the frame is attached and seals to the wall or window frame. The most common methods are magnetic strips, hook-and-loop, and tape.
The magnetic attachment method is one of the easiest to install and best sealing. A thin magnetic strip is formed into the storm window frame. An adhesive-backed paintable steel strip is stuck to the window frame or wall. You just press the storm frame against the strip and it sticks and seals.
One design uses a tiny flexible bellows (like a refrigerator door seal) between the storm window frame and the magnetic strip. This allows it to conform to uneven old window frames and handle temperature expansion.
One hook-and-loop (Velcro) attachment method uses an extra inner gasket next to the hook-and-loop strips. This produces an airtight seal and is compliant with rough and warped window frames.
Super-efficient low-e glass has recently become available for storm windows. Although it is somewhat heavier and more expensive than the clear plastic glazings, low-e glass saves more energy and is more durable.
You can write to me for Utility Bills Update No. 335 listing manufacturers of new efficient interior storm windows, types of frame and glazing materials, attachment methods, average retail costs of each, installation instructions, and information on the new low-e glass for storm windows. Write to James Dulley, The Deseret News, 6906 Royalgreen Dr., Cincinnati, Ohio 45244. Please include $1.50 and self-addressed business-size envelope.
Question - I have heard of "attic bypasses" as a major energy wasting culprit. What are they and how I can I find them to repair them? W. Y.
Answer - Attic bypasses are air leaks through the ceiling into the attic. This accounts for a significant amount of your utility bills, especially in the winter. These leaks are often around plumbing vents, light fixtures, etc..
They are easy to find. The attic insulation acts like an air filter, so the insulation above each leak traps dirt and is darker. Carefully walk through your attic (be careful to step on the joists). Lift up the insulation in suspect spots and check the color.