Choose the product and mounting method first, because each system is measured at a different part of the opening. Take every measurement requested by the applicable guide, measure in more than one place where instructed, and do not subtract an allowance unless the product guide tells you to.

Enter the dimensions requested by the specific product and mounting guide. Most made-to-measure products ask for the opening at the mounting surface; the manufacturer applies the appropriate fabrication allowance. Do not use the glass size or copy the size of an old sash unless the guide specifically asks for it.

Do not make a general deduction. Follow the guide for the exact product and mounting method, and enter the measurements it requests. If paint, trim, or an uneven opening changes the available space, send photos before ordering.

Often, but the correct mounting method and required depth depend on the window. Photograph the full opening, sill profile, and mounting surface with a ruler visible so our team can help identify a suitable system.

Measure the meeting-rail location as shown in the product guide and include it with the order when that option is available. If the existing sash is not centered, send a straight-on photo and the requested rail measurement before production.

Yes. If you are unsure about the mounting surface or a difficult opening, send clear photographs with your measurements before ordering. Our team can help identify the appropriate guide and flag details that need another look.

Many accessible, standard openings can be suitable for homeowner installation. Dry-fit the unit, keep the frame square, fasten it as directed, preserve required drainage, and test operation. Use a qualified installer for difficult access, heavy panels, damaged surrounds, or any condition you cannot safely manage.

For an exterior storm window with weep holes, apply exterior-grade caulk across the top and down both sides. Do not caulk the bottom edge or cover the weep holes, because water must be able to drain. Interior storm windows do not use that exterior drainage path; when the installation guide calls for sealant, caulk continuously around all four sides. Always follow the instructions for the exact model.

No. Our exterior storm windows do not arrive with pre-drilled installation holes. Dry-fit and square the window first, then mark and drill pilot holes through the mounting flange in the locations required by the installation guide before fastening the unit.

Exterior window sizes are ordered in 1/8-inch width increments and 1/4-inch height increments. A 1/8-inch difference in either direction will not prevent the window from fitting: the clamshell is adjustable by up to 1 inch, and all four sides include adjustable self-sealing dual-durometer vinyl thermal breaks that can compensate for an opening that is not perfectly even. Use the measuring guide for the exact model before rounding a dimension.

We offer installation coordination through our growing installer network and do our best to connect customers with a qualified local professional. Availability varies by location and is not guaranteed. You may also use the installation guides or hire a local contractor or handyman.

ENERGY STAR certification applies to a specific model and climate zone. It indicates that the model meets the program requirements for low-e storm windows in the listed zone. Certification does not automatically apply to every product or glass option.

The Attachments Energy Rating Council independently rates the energy performance of window attachments, including storm windows. Its directory reports values such as U-factor, solar heat gain, visible transmittance, and air leakage for specific rated models.

A well-fitted storm window can reduce air movement around an existing window and may make a room feel more comfortable. The added panel and air space can also reduce some outside sound. Results vary with the primary window, installation, seals, glass, and the source of the noise.

Available glass varies by model. Low-E glass improves thermal performance, tempered glass is available where safety glazing is needed, and obscure glass is offered on select products for privacy. The product page lists the choices for that exact window.

Most of our operating storm windows use finished aluminum frames. Standard colors commonly include white, black, bronze, tan, and silver, with custom colors on select models. Finish choices vary by product and may not match another manufacturer exactly.

Replacement components depend on the original model and order. Send the order number when available, plus photos of the full window and the component. We will confirm what can be supplied before you purchase anything.

Programs vary by utility, state, and location, and eligibility often depends on the exact certified model. Check the current program rules before purchasing. We can provide certification information for a model, but we cannot promise that a project will qualify for a particular rebate.

Yes. Each window is configured and made for the measurements and options submitted with the order. Review dimensions, mounting style, color, glass, and operation carefully before approving a custom order.

Lead times vary by product, manufacturer, season, and order size. The current estimate is shown or provided during the ordering process. Custom production begins after the required information and approvals are complete.

Expedited production is not available for every model and cannot be assumed. Ask us before ordering and we will check the current production options for the window you need.

Windows are packaged for freight or parcel delivery according to their size, weight, glass, and destination. Large orders may arrive on a pallet or require a freight appointment. Inspect the shipment promptly and keep the packaging while any damage is documented.

Shipping and handling are calculated separately because the cost depends on window size, glass, quantity, destination, and whether parcel or freight service is required. The applicable charge is shown during the ordering process.

We ship throughout the United States, but available service and cost vary by destination and package size. Alaska and other locations that require special service need a destination-specific quote.

Multi-window pricing depends on the products, quantities, and whether the windows can be produced and shipped together. Contact us with approximate sizes and quantities for a project-specific review.

Yes. Approximate width, height, quantity, glass preference, and destination can provide a planning estimate. Final pricing and production still require the exact measurements and options for every opening.

Available checkout methods are shown at checkout and include major credit cards and supported digital payment options. Financing may also be available through Affirm for eligible purchases.

Contact us immediately. Because custom products are made for a specific opening, changes and cancellations are limited once review or production has begun. The applicable terms depend on the order stage and are explained in our returns and cancellation policy.

Contact us immediately. Do not wait for production or delivery. Whether a dimension can be corrected depends on the order stage; custom products may not be changeable once review or fabrication has begun.

Price depends on the exact width and height, window style, frame, glass, screen, finish, and delivery requirements. Choose a product and enter your dimensions to see available options and pricing, or send us photographs and approximate measurements if you need help identifying the right product first.

Use a soft cloth or nonabrasive sponge with mild soap and water. Avoid abrasive pads and harsh chemicals that may damage glass coatings, acrylic, screens, seals, or painted finishes. Follow the product instructions when removing or opening panels.

Options depend on the model. Common frame colors include white, black, bronze, tan, and silver, with custom colors available on select products. Glazing may include clear glass, low-e glass, safety glass, or acrylic depending on the window.

Send us photographs of the full opening from inside and outside, approximate dimensions, your location, and what you want the window to do. We can help narrow the product and mounting choices before you place an order.

Yes. Include a straight-on photo of the full opening, close-ups of the sill and mounting surface, views from inside and outside when possible, approximate measurements, and your location.

Many exterior models fasten through a mounting flange into a sound exterior mounting surface. The exact flange, fastener locations, sealant, and drainage requirements vary by model, so use the instructions supplied for that window.

Flange width and required mounting clearance vary by product. Check the model drawing before ordering, and send a close-up photo with a ruler visible if the available trim is narrow or irregular.

Yes. Contractors and other trade professionals can contact our team for product selection, measuring guidance, larger projects, and repeat-order support.

Replacement parts and screens depend on the product and order. Send a photo of the full window and the part, along with your order number when available. We will identify what can be supplied and confirm the price and shipping before an order is placed.