• Designed for Alaska’s climate

    Built without compromise

    Get Started
  • Designed for Alaska’s climate

    Built without compromise

    Get Started
  • Designed for Alaska’s climate

    Built without compromise

    Get Started
  • Designed for Alaska’s climate

    Built without compromise

    Get Started
Photos Glenn Aronwitz

Northerm Advantages

Custom-manufactured 3- and 4-pane windows

Made for Alaska

Windows made in the Lower 48 are designed for homes in the Lower 48. Northerm windows are designed for the high winds and subzero temperatures of Alaska’s northern climate.

Quality

Preferred by custom builders, engineered to perform the highest level of insulation, Northerm windows are fully customizable to serve as the architect’s showpiece of a great home.

Efficiency

Northerm windows provide a degree of insulating power (R-value) that compares with a structure’s walls. This “green” approach significantly reduces the energy necessary for home-heating.

Comfort

Feel confident placing your baby’s crib near a window. Northerm windows virtually eliminate the heat transfer (the “cold draft” feeling) caused by conventional, mass-produced windows.

Products

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Don't be caught with 2-pane windows.

Triple-Pane Windows

Triple-Pane Windows

Three panes of glass are not enough to give you the benefits of a triple-pane window. True triple-pane windows require a 1-3/8” glazing pocket, creating the right airspace between the glass. This gives you excellent insulating and noise-reducing barriers. Available in picture, sliding, casement, awning and custom.

Four-Pane Windows

Four-Pane Windows

Our quad-pane window is, quite simply, unmatched. If you want the best, this is it. Four panes of glass in 2″ glazing pockets add up to truly impressive insulation and noise reduction. This is yet another proven design our engineers developed to meet even our toughest extremes. Available in casement, picture and awning designs.

Triple-Pane SLIDER

Triple-Pane SLIDER

Our series of sliding windows are proven, cold-weather windows. The 1-3/8” glazing pocket and tight-sealing closure provides SUPERB insulation and noise reduction not found in other sliders. If you prefer sliders, this is the window your home deserves.

Who we are

Capitol Northerm has been serving Alaskans with high-quality windows since 1953. Formerly known as Capitol Glass Northerm Windows, we build custom windows developed through decades of experience designing and making windows specifically for Alaska’s northern climate. Built in the north, for the north, Capitol Northerm windows and doors are your best choice for keeping your home warmer (and quieter) while saving you money on heating your home.      

Your checklist: 7 things to think about when choosing new windows

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1. Glass

It may seem like a no-brainer, but the glass in your windows plays a critical role in determining how effective they are at keeping your home warm and comfortable. Our three- and four-pane windows provide far better temperature and noise protection than the double-pane windows you’ll get at a home-improvement store.

2. Frame

One of the most important factors that determines the quality of your windows is the frame. There are several aspects of a frame you should consider, which we discuss below. But first is the frame’s material. Capitol Northerm builds our frames with UPVC vinyl, which never needs to be painted and enables us to build stronger, better-insulated windows.

3. Corners

The most common method of constructing window frames is with screws at the corners. This can result in gaps and even water leaks into your walls. It’s also why most windows need to be replaced within a few years. We build frames with a state-of-the-art process called “fusion-welding,” which permanently bonds the vertical and horizontal pieces. This makes a much stronger window and eliminates gaps at the corners.

4. Insulation

Capitol Northerm windows are an average 35.5% warmer than conventional windows. We invented a proprietary frame design with a wider pocket that allows for more space between the glass panes. We then fill that space with argon gas, which is heavier than air. Taken together, these two innovative techniques enable Capitol Northerm windows to provide exceptionally high levels of thermal and noise insulation.

5. R-value

R-value is the industry standard of insulation measurement. Essentially, it measures how effectively parts of the house, like walls and roof, block heat transfer. Capitol Northerm windows have a higher R-value than conventional windows. This is not only a good way to give you confidence in your home’s ability to stand up to Alaska’s winter, it’s also a great way to increase your home’s resale value.

6. Style

All Capitol Northerm windows are custom-made. No matter what style your home is, we can custom manufacture windows that work perfectly with your architecture, including uniquely shaped or large windows. We can design windows that stand out as a bold architectural feature of your home, or that simply accentuate a unique home design.

7. Warranty

Generally speaking, you get what you pay for, whether it’s shoes or windows. If you save money up front only to have to replace your windows in a few years, you haven’t really saved money. Capitol Northerm windows last longer and provide far better thermal and noise insulation. To back that up, we offer a warranty of 20 years against IG failure. During the first 10 years, if one of our windows fails, we will cover the labor to replace it. Certain limitations may apply. Bottom line is, we believe we make the best windows available in Alaska, and we’re willing to stand behind our product.

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