Keep the character you love
Add a made-to-measure layer while keeping the original windows, proportions, and details that make your home yours.
Slim Low-E Aluminum Double-Hung Interior Storm Window
Made to orderPay over timeor choose monthly payments with
- Low-E glass reduces heat transfer and drafts for better thermal performance
- Slim aluminum frame, custom made to the size you enter
- Cuts drafts and outside noise, and helps hold heat in winter and cool air in summer
- Protects your windows without the cost of replacing them, ideal for older homes
- ENERGY STAR certified, with no weep holes to maintain
- Independently rated by AERC, the Attachments Energy Rating Council
Material: Aluminum frame | Low-E glass
How do I measure?
Step-by-step measuring guide
Protected pallet delivery and tax calculated at checkout. Products manufactured at separate facilities arrive in separate shipments. Each shipment has its own delivery charge.
Measure from the top of the window down to the middle of where the two sashes meet, so ours lines up with it. The meeting rail is not always at the exact middle of the window. If yours looks centered, .
Finish & glass
Select White, Brown, Black, or request a custom color.
Estimated production time: 3–4 weeks for White. Shipping time is additional.
Low-E glass included.
Delivery: shipping is calculated at checkout from your address.
Delivery
Packed to protect, liftgate and appointment included
Slim Double-Hung
About this storm window
A two-track interior storm for everyday ventilation where a separate storm-window screen is not needed. Its frame is less than 0.900 inch deep.
Benefits
InteriorVertical sliding sashNo screen
- The lower sash opens vertically to selectable positions.
- The upper sash is removable for cleaning and service.
- A compressible seal and jamb-mounted frame help limit drafts while leaving the primary window in place.
- Independently rated by AERC, the Attachments Energy Rating Council
Why you'll love it
- Keeps your original windows in place
- Made to the dimensions you enter
- Backed by our lifetime limited warranty
Product specifications
- Placement: Interior
- Operation: Vertical sliding sash
- Screen: No screen
- Glass: Low-E glass; specialty glazing by quote
- Colors: White, Brown, Black, Custom color
How to measure
- Follow the step-by-step guide for this window style
- Measure the opening in more than one place
- Record the mounting depth and anything that could block the panel
Installation and care
- Installation guides are available for every style we sell
- Homeowners can request a separate installation quote
- Care guides cover cleaning your window
Financing with Affirm
Financing with Affirm
Pay over time on eligible orders. Affirm shows the terms of each plan offered to you before you accept one.
20-year limited warranty
A 20-year limited warranty covers aluminum structural members and mechanical parts against defects in material and workmanship. Painted aluminum is covered against blistering, peeling and flaking for 10 years, and screens for 1 year. Broken glass, torn screens and damage from improper installation are not covered.
Coverage detailsProtected shipping
Eligible small exterior windows ship in individually protected cartons by Ground. Vinyl interior and Low-E aluminum windows, larger windows, doors and bulk orders use protective pallet packing and delivery.
Shipping and handlingSimple DIY installation
Step-by-step installation guides for every style we sell, so you can put it up yourself.
Installation guidesMade to your measurements
Each unit is made to the dimensions you enter, so measure carefully before you order.
Measuring guidesEstimated Production Time: White: 3–4 weeks; Brown, Black, and custom colors: 4–6 weeks
Lead times are estimates and may change based on order volume, materials, weather, and shipping conditions.
- Delivery is calculated at checkout. Small eligible windows can ship Ground; larger shipments use protected pallet delivery.
- Product prices exclude shipping and handling. The checkout delivery charge includes protective packaging and the delivery service shown for your address.
- Delivery varies by destination, dimensions, and shipment size. See the shipping charge at checkout before paying. View delivery details
Need professional installation?
Homeowners can request installation at checkout. We will send a separate installation quote within 24 hours after the order is placed. Installer-coordinated delivery may also avoid residential liftgate charges and reduce shipping costs.
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Choose options3 Reasons to Love Storm Windows
Make room for comfort
A well-fitted storm window can help reduce drafts. Choose the mounting style and glass that suit your existing windows and the way you live.
A fit for your everyday
From fixed picture panels to operating sliders, choose a configuration around your view, ventilation needs, and access for cleaning.
FAQs
What is the Slim Low-E Aluminum Double-Hung Interior Storm Window?
A two-track interior storm for everyday ventilation where a separate storm-window screen is not needed. Its frame is less than 0.900 inch deep.
Does the Slim Low-E Aluminum Double-Hung Interior Storm Window include a screen?
No. This model is glass only. Operation: vertical sliding sash.
What glass is in the Slim Low-E Aluminum Double-Hung Interior Storm Window?
Low-E glass. Specialty glazing is reviewed separately by quote.
Is the Slim Low-E Aluminum Double-Hung Interior Storm Window ENERGY STAR certified?
Yes. This model is ENERGY STAR certified for Northern climate zone. It is also designed without weep holes.
Is the Slim Low-E Aluminum Double-Hung Interior Storm Window AERC certified?
Yes. This model is independently rated by the Attachments Energy Rating Council (AERC), which tests and rates the energy performance of window attachments such as storm windows. AERC does not pass or fail a product the way ENERGY STAR does; it publishes performance numbers so models can be compared. Ask us and we will send the certification details for this model.
Are storm windows eligible for tax credits or rebates?
The federal Energy Efficient Home Improvement Credit ended for property placed in service after December 31, 2025, so there is no current federal credit for windows. Some utilities, states and local programs still offer efficiency rebates, and many ask for ENERGY STAR certified or AERC-rated products. Programs and amounts vary, so check with yours before you buy. We cannot promise any specific rebate, but we can supply certification details for a model on request.
What is an insulating glass system (IGS), and how is it different from an IGU?
An insulating glass system mounts over the window you already have, and the still air between the two windows is the insulating layer; the added glass is typically Low-E coated. An insulating glass unit (IGU) seals two or more panes together at the edge, usually with gas inside, and is part of a replacement window. A system has no sealed edge or gas fill to fail, and your original window stays in place.
Does the Slim Low-E Aluminum Double-Hung Interior Storm Window have weep holes?
No. It is designed without weep holes, so there is nothing to keep clear or protect when you seal around it.
Which frame colors does the Slim Low-E Aluminum Double-Hung Interior Storm Window come in?
White, Brown, Black, Custom color. Choose the color on the product page after you enter your measurements.
Where does the Slim Low-E Aluminum Double-Hung Interior Storm Window mount?
It mounts inside the room. The lower sash opens vertically to selectable positions.
How do I measure for the Slim Low-E Aluminum Double-Hung Interior Storm Window?
Measure the opening width and height at several points and use the smallest reading, then enter the sizes on the product page. Check the mounting guide for this style before you order.
Where do I measure the meeting rail?
Measure from the top of the storm window opening down to the middle of where the two panels meet. That puts our meeting rail in line with your existing one.
Compare Your Options
Swipe the table to compare options →
| Consideration | Our Custom Storm Windows | DIY Window Film Kits | Full Replacement Windows |
|---|---|---|---|
| Your existing windows | Keep sound original windows in place | Keep existing windows; apply film over the opening | Replace existing window components |
| Materials | Framed glass panels with product-specific glazing choices | Thin shrink-to-fit plastic film and adhesive tape | New frame and glazing system; materials vary |
| Fit and finish | Made-to-measure sizes and a choice of frame finishes | Film trimmed to the opening | Sizes and finish choices vary by product |
| Ventilation | Fixed or operating configurations available | Film must be removed to access the covered opening | Operating options vary by product |
| Project scope | Add a fitted layer to a suitable existing opening | Apply tape, fit film, and shrink it with heat | Remove and install window components; finishing work may be needed |
| Where the value is | Custom fit and reusable framed panels while retaining existing windows | A simple, temporary draft-control approach | An option when the existing window needs replacement |
Compare the complete project, including glass, installation, shipping, and the condition of your existing windows. Features and costs vary by configuration and supplier.
Learn more: window film kits · storm windows and replacement options.
Is Interior or Exterior Right for You?
Two ways to add comfort while keeping the windows you love. Start with your mounting space and how you use each room.
Interior Storm Windows
An inside-mounted layer for homes where preserving the exterior appearance matters.
- Access from inside your home
- Removable or operating configurations
- Check mounting depth and hardware clearance
Exterior Storm Windows
An outside-mounted layer with fixed and ventilating styles for a range of openings.
- Choose fixed, vertical, or horizontal operation
- Coordinate the frame finish with your home
- Check mounting surface and drainage
Not sure where to start?
Talk to our team
Send us your opening sizes or a photo and we will help you choose the right style, finish and glass.