While both humidity and foundation issues can cause operation problems, the key lies in whether the sticking is temporary or persistent. In Colorado, seasonal humidity often causes wood frames to expand and contract. If your windows bind during wet spring months but return to normal operation during dry periods, the cause is likely environmental.

However, foundation settlement is a primary culprit for persistent jamming. Our expansive clay soils swell and shrink, causing differential settlement that torques window frames out of square. You are likely dealing with a structural issue rather than a seasonal one if you notice the following:

• Uneven Gaps: Measure the clearance around the window sash. A gap that tapers or is 1/8 inch wider on one side suggests the frame is no longer plumb.
• Accompanying Cracks: Look for diagonal drywall cracks radiating from the corners of the window frame or stair-step cracks in brick veneer on the home’s exterior.
• Year-Round Issues: If the window remains jammed regardless of the weather or moisture levels, it indicates permanent structural misalignment.

We recommend tracking these symptoms over time. If jamming persists or is accompanied by other signs of movement, it is important to consult a licensed structural engineer for a definitive diagnosis. As a family-owned and operated company since 1996, we can provide a professional evaluation and custom quote for stabilization if settlement is confirmed.

All information is for general informational purposes; estimates are preliminary until confirmed by an on-site inspection.

• Sticking Doors and Windows: Signs of Foundation Settlement