High-quality window & door installations
Fiberglass
Pella Impervia windows are made from Pella's proprietary Duracast® fiberglass — the material Pella rates as the strongest it uses in windows. They deliver the look of a painted wood window without the upkeep. Cascade View installs Impervia windows throughout Kirkland and Greater Seattle.
Why this collection
Duracast is a five-layer fiberglass composite reinforced with a patented interlocking mat. It resists warping, denting and UV damage year after year.
A factory powder-coat finish that meets the AAMA 624 standard for fiberglass coatings. Impervia windows never need repainting or refinishing.
Impervia windows are designed to resist water, wind and outside noise -
a strong fit for rainy Northwest seasons and busy streets.
Pella Impervia casement windows in black, [city]
Hinged at the top and opens outward, so you can ventilate even during light rain.
Hinged on the side and cranks outward for full ventilation. A great choice over sinks and in hard-to-reach spots.
Both sashes slide up and down. Classic look, easy cleaning on tilt-in models.
A fixed window with maximum glass for views and light. The most energy-efficient style.
The bottom sash opens while the top stays fixed — a simple, efficient option.
Sashes glide side to side. Ideal for wide openings and spaces with little clearance.
Frames and sashes are made from Duracast fiberglass composite with a durable factory powder-coat finish. Choose from five colors, including Black for a modern look. Optional grilles-between-the-glass add a classic divided-light style.
Fiberglass has low thermal conductivity, so Impervia frames help keep heat inside in winter. Pair them with Low-E insulating glass for better year-round comfort and lower energy bills. Most Impervia windows with Low-E glass meet ENERGY STAR® guidelines.
Impervia casement windows feature Pella's Easy-Slide Operator: slide a lever to open the window instead of cranking. Large operable casements go up to 37-1/2" × 79-1/2", and fixed units up to 71-1/2" × 79-1/2".
Pella's proprietary fiberglass is backed by a limited lifetime warranty, plus 20 years on insulating glass and 10 years on the product. See pella.com/warranty for details.
FAQ
Find answers to common questions about Pella window materials, features, and performance. Our team can help you compare options and choose the right windows for your home.
Fiberglass is stronger and more dimensionally stable than vinyl, and it holds dark colors well. Vinyl is the more budget-friendly option. We'll compare both in your home.
Pella designs its fiberglass windows for a lifetime of everyday use, and the fiberglass is covered by a limited lifetime warranty.
Yes. Black is one of five factory powder-coat colors.