Report Title: Procedure for Resealing a Fixed Window
Purpose: To restore the weatherproof seal, improve energy efficiency, and prevent moisture intrusion.
Applies to: Fixed windows (picture windows, stationary casement, or glass bonded to frame).

1. The Exterior Perimeter Seal (Caulking)

This is the bead of caulk between the window frame and the rough opening of your house. If this fails, water enters the wall cavity. Symptoms: Peeling paint, soft drywall below the window, or visible cracks in the exterior caulk.

Conclusion: Resealing a fixed window is a low-cost, high-return DIY task that prevents air leaks and water damage. Proper surface cleaning and choosing the right exterior-grade sealant are the most critical success factors.

Stop the Drafts: The DIY Guide to Resealing a Fixed Window

There are few things more frustrating than sitting next to a window on a chilly evening and feeling an invisible stream of cold air hitting your neck. If you have a fixed window (a window that does not open or close), you might assume that it should be airtight. However, over time, the sealant around the frame cracks, shrinks, and pulls away, turning your cozy home into a drafty space.

For Water Damage or Extensive Damage

  1. Consult a professional: If the damage is extensive or you're unsure about how to proceed, consider hiring a professional to assess and repair the window.
  2. Replace damaged parts: If necessary, replace damaged parts, such as the window sash or frame.

Finish and cure

Wipe the area with a damp cloth or rubbing alcohol to remove dust, grease, and debris. For exterior frames, ensure the area is dry; however, some advanced sealants like OSI Quad MAX can stick to wet surfaces if necessary. 4. Apply the New Bead Cut the sealant nozzle at a 45-degree angle. Apply continuous, even pressure with the caulking gun.

Pro Tip: Don't just apply new caulk over the old; it will fail to bond properly. 2. Clean and Prep the Surface How to Fix Your Leaky Windows | A DIY Guide