Pella® Impervia® Fiberglass Single-Hung Window
4.27
Mulled
Pella Impervia 3-wide mulled single-hung windows include three units joined by their frames in the factory. This triples the size of a single unit, creating a more expansive look. Made from the strongest material for windows, Pella’s exclusive fiberglass provides lasting durability and sleek, timeless style.16 Single-hung windows have a moveable bottom sash for ventilation with a top sash that remains fixed. Achieve your design vision with a variety of popular features and options to choose from.
- Three fiberglass single-hung windows mulled together as a combined unit.
- Fiberglass material is tested beyond industry standards to perform from -40ºF to 180ºF.
- Equal sightlines deliver a clean, consistent aesthetic unlike other single-hung designs that trade off aesthetic details.
Configuration: 3-wide
Free In-Home Consultation
Limited appointments available
Visit your Pella Showroom
There are no showrooms within 200 miles of this location.
Pella Impervia Single-Hung Windows Features
Strongest Material for Windows 9
Resists Bends, Dents and Breaks
Durable Three-Way Corner Joints
Design Options
Solid-Color Frames
Black
Brown
White
Morning Sky Gray
Tan
Downloads & Specifications
Design, Performance & Size Tables
2D Cross Section
2D Elevation
3D & BIM
Pella Impervia Single-Hung Window Specs & Install Details
- Made from our proprietary fiberglass material, the strongest material for windows, engineered for lasting durability9
- Can handle the most extreme heat and cold9
- Strong, zinc die-cast locking mechanism for enhanced durability and water resistance
- Single-hung windows available in sizes up to 47-1/2” x 79-1/2”
- Performance class and grade LC40-LC50
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| Weatherstripping | Sash is weatherstripped around the perimeter with a dual fin-type pile weatherstrip. |
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Pella Impervia Reviews
Frequently Asked Questions
FAQs about My Product
Are fiberglass windows better than vinyl?
It depends what benefits are most important to you. Pella's fiberglass is the strongest material for windows, offering a low-maintenance and durable finish.9 If you're after a window that's tested to extremes, Pella's fiberglass windows are the way to go. Vinyl windows are easy to care for, energy efficient and budget friendly. Pella’s unique vinyl formula is performance-tested for excellent weathering, durability and color retention.
Are fiberglass windows efficient?
Yes, Pella's fiberglass window frames have virtually no expansion and contraction to help improve energy efficiency, reduce the risk for seal failure and provide long-term stability for dependable operation. In addition to the material of the window frame, glass types and coatings also affect the energy efficiency of a window.
Why should I use single-hung windows?
Because only one sash is moveable on a single-hung windows, they are great for homeowners who are looking for potential cost savings replacing multiple windows and for replacement on the first floor of a home. Single-hung windows can be slightly more efficient than double-hung windows, as there are fewer moving parts which reduces the opportunity for air infiltration. To learn more about what makes single-hung windows unique, check out this article.
FAQs about Purchasing Online
For online orders, what is your policy for returns and products damaged during shipping?
We’re committed to customer satisfaction. If the product you ordered online is damaged during shipping or you do not receive exactly what you ordered, we want to make it right by refunding you in full or sending you a new product. We do not accept returns of undamaged made-to-order products in which a buyer ordered the incorrect size or color, or decided the product was no longer needed. See pella.com/warranty for additional details and exclusions. If you have questions about returns and refunds, please email shop@pella.com.
Who will install the products I ordered?
When you receive your order, you can either install the product on your own with help from our installation kit. Or, hire a Pella Certified Contractor® to take care of installation for you. They are trained and certified to install Pella products.
What’s included in my online window and door purchase?
Product only. When you purchase a window, door or replacement part online, your order will arrive with the product only. Installation is not included. If you need installation parts and accessories, those can be purchased online as well.
Pella Impervia
With proven performance and sleek, timeless style, Pella Impervia windows are ready to handle virtually anything life throws at them. These windows provide superior strength when compared to aluminum, standard fiberglass, wood and vinyl, so you can trust them to last.9
Pella Impervia Window Inspiration
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