Custom Wood Window Sash Replacement Kits — For Old & Historic Homes

Custom Wood Window Sash Replacement Kits

For Old & Historic Homes

Old sash, good frame — keep the frame and replace the sash.

Our custom-sized wood window sash replacement kits are made to fit your existing double-hung wood window opening. You keep the existing frame, sill and trim and replace the operating sash system.

What you get

• New upper sash
• New lower sash
• Clear insulated glass
• New jamb liner and balance system
• Stops / covers
• Standard sash-lock hardware
• Installation hardware

Your existing frame, sill and trim stay in place.

Build your window online

Start with the things you can see: divided-lite pattern, finish, wood or protective aluminum-clad exterior, and an approximate size for pricing.

You do not need production-perfect measurements or every technical detail figured out before you buy. After purchase, Classic Door works with you to confirm the exact measurements and final specifications before anything goes into production.

You measure the opening. We confirm the window.

You do not need to calculate the finished sash size yourself. After purchase, we work from the existing window opening and confirm the measurements and production details with you before the kit is made.

This is a custom order, but you are not left on your own to turn field measurements into a production window.

After you order

Before production, we confirm the exact measurements and final details with you, including the divided-lite layout, finish, glass, hardware and any applicable optional upgrades.

Sash lifts, window opening control devices, screens and other applicable options can be finalized after purchase.

Nothing goes into production until the final details are confirmed.

For DIY customers

For a reasonably handy homeowner, measuring and installation are approachable. Start with an approximate width and height for ordering; exact production measurements are confirmed after purchase.

For builders and contractors

Order one opening, several windows, or phase a larger project over time. The same custom-sized sash kit works for renovation and restoration projects where the existing wood frame is worth keeping.

See how it works

Our video library includes a walkthrough of how a window sash replacement kit works and a separate screen-installation video.

FAQ

What is a window sash replacement kit?
A sash replacement kit replaces the upper and lower sash and operating system while keeping the existing wood window frame, sill and trim in place.

Can I replace just the sash on an old wood window?
Often, yes. If the existing frame and sill are still sound, replacing the sash system can avoid tearing out a good window frame.

Do I need exact measurements before I order?
No. Start with an approximate size for pricing. Classic Door confirms the exact production measurements and final specifications with you after purchase and before anything is made.

Do I need to calculate the finished sash size myself?
No. You measure the existing window opening. Classic Door works through the production sizing and confirms the final dimensions with you before the kit is made.

Should I choose wood or aluminum-clad wood?
A wood window is wood inside and outside. The aluminum-clad option keeps wood on the interior and adds protective aluminum cladding to the exterior.

Are screens included?
No. Screens are optional and can be finalized after purchase.

Can I add sash lifts or window opening control devices?
Yes. Sash lifts, window opening control devices and other applicable hardware options can be selected after purchase.