Casement Windows

How Casement Windows Work

Casement windows hinge on one side and swing outward, typically operated by a crank handle connected to an operator arm. When closed, the sash presses tightly against the weatherstripping, creating one of the best seals of any window type. This design makes them excellent for energy efficiency and keeping out drafts.

Common Casement Window Problems

Broken or stripped crank handles are the most frequent issue. The handle either spins freely without engaging the mechanism or breaks off entirely. We stock replacement cranks for most major brands.

Worn operator arms develop play over time, making the window difficult to open or preventing it from closing tightly. The operator mechanism can also strip where it connects to the crank.

Hinge failures cause the sash to sag, creating gaps that let in drafts and making the window hard to close. Hinges can also seize from corrosion or lack of lubrication.

Foggy glass indicates seal failure in the insulated glass unit. The glass itself is usually fine—only the sealed unit needs replacement, not the entire window.

Casement Window Repair Services

• Crank handle replacement and operator repair
• Hinge adjustment and replacement
• Weatherstripping replacement for better seal
• Foggy sealed unit replacement
• Lock and keeper adjustment
• Full sash replacement when needed

When to Repair vs. Replace

Most casement window issues can be repaired cost-effectively. Hardware problems—cranks, hinges, operators—are almost always worth fixing. Even foggy glass can be replaced without changing the entire window if the frame is in good condition.

Consider full replacement if the frame is rotting (wood windows), severely warped, or if you're dealing with single-pane glass and want to upgrade to modern energy-efficient units.