Fiberglass windows are generally less expensive than wood and more than vinyl. Milgard has a full lifetime warranty, others very, ask for specifics.
Most fiberglass windows with proper glazing will qualify for the up to $1,500.00 Federal Energy Tax Credit.
They can be all fiberglass or fiberglass with either a wood clad or wood veneer interior. Most come with several standard exterior colors choices and some interior. Some manufactures offer custom sizes and can be retrofitted into existing openings.
Fiberglass windows are relatively new, however Fiberglass windows have the strongest frames. They are the most energy efficient, durable, least susceptible to expansion and contraction and color stable of any of the window frames. The material itself has been around for a long time. Long used for items like boat hulls and auto bodies. Fiberglass is the next big thing in windows.
One of the big benefits of fiberglass is that it can be painted and they won’t deteriorate if the paint wears off.
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