Historic home with traditional windows

Horizontal Storm Windows

Compare custom horizontal storm windows. Choose the mounting style, frame, glass, and operation for your opening.

9 Products

Choosing Horizontal Storm Windows

For wide openings, compare two-lite and three-lite layouts, which panel opens, and the position of your existing vertical meeting rails. Confirm the opening direction before ordering.

Start with where your storm window will mount and how your existing window opens. Explore interior storm windows for an inside-mounted layer, exterior storm windows for fixed or ventilating openings, or Low-E storm windows for additional glazing options. Check the mounting requirements and use our measuring guides before ordering.

What affects the price?

Dimensions determine the size of your frame and glass. Glass options, frame finish, and configuration (including fixed or operating panels, track count) also affect the price. Configure your chosen product for available pricing, or request a quote for details that need review.

Make the Most of Your Windows

FAQs

Which window styles pair best with horizontal storm windows?

They are the go-to choice for casement windows, horizontal sliders, and any opening wider than it is tall where side-to-side panel movement is needed.

How do dual-rail and three-rail horizontal models differ?

Dual-rail models use two tracks for a glass panel and a screen, simple and economical. Three-rail models add an extra track, letting you position two screens for broader ventilation options.

Can I slide the panels to either side for airflow?

Yes. The sliding panels can be repositioned within the frame, and with the horizontal two-track you can also choose which side holds the operable pane.

Do horizontal storm windows save energy?

They trap an insulating air layer between the storm panel and your primary glass, which limits conductive heat loss and reduces air leakage around the frame.

How should I measure for a horizontal slider storm window?

Measure the opening width and height in at least three spots, use the smallest reading for each dimension, and consult our measuring guide for product-specific rules.

A Good Fit, from the Start

Made to Your Measurements

Custom sizes for the windows already in your home.

Keep What You Love

Add a protective layer while keeping your existing windows.

Choose Your Details

Compare frame finishes, glass, and opening styles before ordering.

Help Along the Way

Measuring and installation guides, with a team you can contact for help.