Aluminum window installation details Steps

Installing aluminum windows requires precision to ensure proper fit, insulation, and waterproofing. Below are the key steps in the installation process:

Aluminum Window Installation Steps

1. Preparation

Measure Opening: Verify that the rough opening is square, level, and plumb. It should be slightly larger than the window frame (usually by 10–20mm).

Remove Obstructions: Clear debris, old sealant, and nails from the opening.

Install Flashing Tape (if applicable): Apply waterproof membrane around the sill to prevent water infiltration.

2. Frame Placement

Dry Fit the Window: Insert the window to check the fit and alignment.

Add Sealant: Apply a bead of silicone sealant around the perimeter of the opening (especially sill and sides).

Position the Frame: Insert the aluminum window frame into the opening from the exterior.

3. Fixing the Frame

Shim the Frame: Use plastic or wooden shims to center and level the window in the opening.

Secure the Frame: Screw the window frame into place through pre-drilled holes (usually in the side jambs).

Recheck for Level and Plumb: Ensure the window remains square after fixing.

4. Insulation and Sealing

Foam Insulation: Fill gaps around the frame with low-expansion polyurethane foam.

Seal Exterior Gaps: Apply weather-resistant caulk or sealant along the outer edges to prevent air and water leakage.

5. Interior Finishing

Install Interior Trim: Add any necessary trims or moldings to cover gaps.

Clean the Window: Remove protective films and clean glass and frame.