There are over 1000 vinyl window manufacturers, most of whom produce low-end, builder-grade products that do not stand the test of time. Cheap vinyl windows may be fine in mild climates, but they don’t wont’ hold up well to the hot & humid Texas summer heat.
Notice how these five year old vinyl windows are sagging across the top and bowing up across the bottom. These windows are leaking copious amounts of air, making them very inefficient.
The spotting you see on these vinyl windows is the pigment in the vinyl beginning to break down. These window are less than 5 years old.
Cheaper vinyl windows, with minimum Titanium Dioxide will begin to “chaulk” rapidly, indicating that the PVC material is beginning to degrade.
Warped sashes create a pathway for air leakage as the weatherstripping is pulled away from the frame.
Warped vinyl windows not only allow your expensive air-conditioning to leak out, while pulling hot/humid exterior air into your house, they can also put enough pressure on the insulated glass unit to break the seal.
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