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At GS Exterior Experts, we’re committed to providing you with Pella Fiberglass Windows that embody innovation, quality, and enduring beauty. Pella Impervia windows are built from Duracast®, Pella’s five-layer engineered fiberglass composite, with a powder-coat finish rather than paint. Impervia units are tested to ASTM E330 for structural pressures up to 75 PSF, a DP50 rating, which is a commercial-grade threshold for a residential window. Choose windows that exceed expectations and elevate your Colorado home. Get in touch for FREE estimates.
Duracast® fiberglass expands at almost the same rate as glass, which reduces the risk of seal failure through freeze-thaw cycles. Impervia is rated to DP50 under ASTM E330.
The powder-coat finish meets AAMA 624 and resists chalking, fading, and scratching, including in dark colors.
Impervia units are available with Low-E and argon-filled glazing. Ask for the NFRC label showing certified U-factor and SHGC for your exact configuration.
Enjoy the quality appearance of painted wood without the need for regular upkeep.
Choose from a range of window styles, including Awning, Casement, Double Hung, Single Hung, and Sliding.
