Window balance repair & replacement in NYC
Restore smooth operation and eliminate sash drop without replacing the entire window.
OEM-Spec Balance Systems spiral, coil, block-and-tackle
Sash Holds Position no more slamming
Included pivot shoe & channel replacement
$11M Coverage strong liability coverage for your property
The mechanics of
glass failure
A failed balance system turns a working window into a safety hazard.
UNDERSTANDING “SPRING FATIGUE”
Your window balance system is a precisely calibrated counterweight mechanism. Whether spiral springs, coil balances, or block-and-tackle systems, each type supports the sash weight through constant tension.
NYC’s temperature extremes — winter cold stiffening springs, summer heat weakening metal — accelerate material fatigue. Springs lose tension. Pivot shoes crack. Channels corrode.
THE HIDDEN COSTS OF WAITING:
Safety Hazards:
A broken window balance allows the sash to slam shut without warning. This creates serious injury risk, especially for children, and can shatter glass, strip hardware, or damage the frame beyond simple repair.
Operational Failure Cascade:
Forcing a window open when balances have failed bends the pivot shoe, strips screw holes, and racks the sash out of square. What starts as a $150 sash balance replacement can become a $1,200 frame rebuild.
Energy Waste:
Windows that won’t stay open get propped with objects, preventing proper closure and lock engagement. The resulting air gaps waste heating and cooling, driving energy costs up 10-20% per affected window.
THE BIG APPLE balance protocol
We diagnose the exact balance type, source OEM-spec replacements, and calibrate tension to manufacturer standards.
Schedule a site visit
Precision identification
Using sash weight measurement and visual inspection, we identify whether your window uses spiral balances, coil spring balances, channel balances, or block-and-tackle systems. A 1960s double-hung window balance repair requires different parts than a 2010 vinyl tilt unit, your repair is manufacturer-matched, not generic. Controlled removal & replacement
We remove the failed balance assembly without damaging the sash or jamb liners. We access pivot shoes, release spring tension, and remove worn components cleanly. For spiral systems, we install calibrated springs matched to sash weight. For coil systems, we fit the correct shoe-and-tube assembly. For older setups, we can replace window weights with spring systems for low-maintenance operation. Tension calibration & safety testing
We test sash travel across the full range, check hold-open function at multiple heights, and confirm smooth, binding-free operation.Big Apple Window Company at work
More than 2 decades of experience in property maintenance.
Restore safe operation
See the difference. We replaced failed balance systems and eliminated sash drop hazards — without touching the window frames or interior finishes.
BEFORE
AFTER
Engineering specifications & guarantees
Clear specs. Straight answers. Compare our specs against any window balance repair company in NYC. We don’t cut corners on materials, safety, or liability coverage.
Balance standards
OEM-Grade Components Only. We use Caldwell spiral balances, Amesbury constant-force systems, and Ashland block-and-tackle assemblies — manufacturer-spec parts, not generic hardware store equivalents. For window spring replacement, we match original spring rates within 5% tolerance.
Calibration protocol
Weight-Matched Tension. We calculate exact sash weight (glass + frame) and install balances rated for 110% of that load. This ensures reliable hold-open function across the window’s full travel range without over-tensioning that causes binding.
Warranty protection
2-Year Balance Function Warranty. If the window balance fails or the sash won’t stay up within 24 months, we come back and make it right. No service fees. This covers all window balance replacement workmanship and installed components.
Risk management
$11 Million Umbrella Coverage. Your property is protected by strong liability coverage, including NY Labor Law protection with no Action Over exclusions. For co-ops and condos, we provide documentation and coordinate with building management.
EXPERIENCE THE NEW STANDARD
Join 200+ landmark buildings and 10,000+ homeowners.
While we’re on-site
Our technicians spot related window issues during balance repair service.
