Window Sash Replacement Services
Locks, cranks, hinges and weatherstripping are on the window repair page. Fogged glass in a sound sash is foggy window repair. This page is about replacing the sash itself, and the balances it rides on.
Sash Replacement Kits in Wood Frames
A sash kit is two new sashes plus two jamb liners. The old sashes, stops and parting bead come out. In older windows the cast-iron sash weights come out too, and the empty weight pockets get air-sealed and insulated, as the Building America Solution Center describes. The jamb liners fit into the old frame and become the new tracks, with tilt-in sashes riding in them. NFRC's consumer guide says many manufacturers offer these kits, but the existing frame must be in good condition, with no moisture or air leakage.
The fit matters more than the brand. Replacement sashes are custom built for the opening and have very little room for adjustment, so the side jambs need to be close to parallel. Wood sashes are a little more forgiving: their tops and bottoms can be cut to match a frame slightly out of square. We'd want the installer to measure each opening at the top, middle and bottom, not once.
Manufacturer Replacement Sashes for Vinyl Windows
On a tilt-in vinyl window, each sash rides on pivot bars that seat in shoes inside the jamb, so a sash can come out without touching the frame. When a sash is cracked, warped or fogged with the glass bonded in, ask whether the maker still supplies sashes for that series. HomeGuide puts vinyl sashes at $150 to $300 for the part and $200 to $500 installed. If the series has been discontinued, the fallback is a full insert window.
Block-and-Tackle Balances
A block-and-tackle (or channel) balance hides in the jamb: a metal channel with a spring, a cord and a set of pulleys that together offset the sash's weight. With constant-force balances, it's one of the two most common types in modern hung windows. The weak points are the cord, the spring and the shoe that slides in the jamb and holds the sash's pivot bar. A cracked shoe lets the sash tilt wrong or drop out of its seat. HomeGuide puts a balance or spring repair at $50 to $100.
Spiral and Constant-Force Balances
A spiral balance is a tube with a twisted rod inside, attached to a spring; the tension can be adjusted with a tool to suit the sash. A constant-force balance is a coiled stainless steel spring in a small housing that pays out like a tape measure as the sash moves. Larger sashes need bigger coils. Balances are sized to the weight of the sash. If a new sash gets heavier glass, such as a triple-pane upgrade, the balances should be checked against the new weight before anyone reuses them.
Sash vs Full Window: When the Frame Decides
The frame is the deciding part. If the sill is soft, the jambs are bowed or the frame leaks water around its edges, a new sash just goes into a bad opening. That calls for window sill replacement first, or a full replacement window from the homepage options. If the frame is sound and the problem is a rotted sash, failed balances or a broken seal, a sash costs a fraction of a new window.
Why Troy homeowners call Troy Windows
- Free in-home measure of every opening
- Written, itemized quote before any work
- Frames and sills checked before a price
- One local window installer, not a call list
- No charge to homeowners for the referral
Window Sash Replacement Cost in Troy
National figures from HomeGuide's sash replacement guide (October 2025):
| Job | National range |
|---|---|
| Sash replacement, per window | $200 to $600 |
| Sash part only | $150 to $400 |
| Labor | $50 to $200 |
| Single-hung sash | $200 to $500 |
| Double-hung sashes | $250 to $600 |
| Casement sash | $250 to $800+ |
| Wood sash, installed | $300 to $800 |
| Balance or spring repair | $50 to $100 |
HomeGuide's labor figures rise with the age of the frame: $50 to $150 for easy access, $100 to $200 for fitting sashes into older wood frames, and $300 or more when damaged material has to come out first.
Sash Replacement in Older Troy Homes
Most Troy houses were built before 1980, so two rules usually matter.
Lead-safe work. A sash job pulls painted stops and parting beads. One window may stay under EPA's small-job threshold, but a whole house of sash kits in a pre-1978 home will go past it, so ask to see the RRP certificate (details on the lead-safe window replacement page).
Energy code. Michigan's code exempts glass-only replacement and storm windows, but a new sash isn't on that list. Ask for the new sashes' U-factor in writing and check it against the limit on the energy efficient windows page.
One tip from the trade side: if your double-hungs still have ropes and weights and the wood is sound, compare a sash kit with window restoration before you decide. The National Park Service calls new sash cords one of the most common repairs on old double-hungs.