Window seals are a key component that prevent air leaks, which causes issues like drafts, water infiltration and increased energy bills. Seal failure is not unheard of, and knowing its causes can help you identify early signs, as well as make informed decisions when buying new windows. In today’s post, Roof Masters takes a look at the common causes of window seal failure.
Temperature Changes
As a part of the building’s exterior, windows are exposed to a wide range of temperature fluctuations, which cause expansion and contraction. Some materials keep their shape despite the temperature changes; others, not as much. Window seals made of the latter will form cracks and gaps over time, eventually resulting in seal failure. It’s difficult to ascertain the long-term performance of the seals that come with replacement windows at purchase, so your best protection is good material warranty coverage.
Improper Installation
Installation mistakes can defeat even the best windows on the market. For window seals to work, the parts need to be properly aligned — the frames need to be level and sealed against the wall opening, the sashes need to form a seal when closed, and the hardware shouldn’t get in the way of the window operation. These small details, if not properly done, can result in gaps that will ultimately result in air leaks. Hiring a contractor who does quality checks after installation can help prevent such issues, while a good workmanship warranty or quality guarantee can help mitigate the same after the fact.
Physical Damage
Physical damage is probably the most obvious-sounding reason, but often it’s the one that goes undetected. In addition to incidents like getting hit by hailstones or a stray baseball, windows can get damaged in many ways. Tree branches may poke at the window seals and gradually wear the seals out. Incorrect cleaning methods like usage of harsh chemicals, sharp tools, or pressure washers can inadvertently damage the window seals. Improper use of window hardware, such as applying excessive force to the windows, can likewise damage the window seals. Fortunately, most of these can be prevented by taking the time to read the precautions as stated by the manufacturer. If your windows are due for replacement, your window contractor can demonstrate the best ways to care for your windows.
Planning on getting new windows? Call Roof Masters at (301) 230-7663. You can also fill out our
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