how to replace a window in brick house

3 min read 05-02-2025

Replacing a window in a brick house presents unique challenges compared to other types of homes. This comprehensive guide will walk you through the process, step-by-step, ensuring a professional-looking and weather-tight result. Remember, safety is paramount. If you're uncomfortable with any step, consult a professional.

Assessing the Situation: Before You Begin

Before you even touch a brick, careful planning is crucial. This initial assessment will save you time and potential headaches later.

1. Choosing Your Replacement Window

Measure Carefully: Accurate measurements are essential. Measure the window opening's width, height, and depth. Consider the window's existing frame material (wood, vinyl, aluminum).
Material Selection: Vinyl windows are popular for their low maintenance and affordability. Fiberglass offers superior strength and insulation. Wood provides a classic look but requires more maintenance.
Window Type: Consider the style—double-hung, casement, sliding, etc.—to match your existing aesthetic and needs. Energy-efficient options, like those with low-E coatings and argon gas fills, are a smart investment.

2. Gathering Your Tools and Materials

You'll need a range of tools and materials. Having everything on hand beforehand streamlines the process:

Tools: Hammer, pry bar, screwdriver (Phillips and flathead), utility knife, level, measuring tape, safety glasses, work gloves, chisel, caulking gun, masonry drill with appropriate bit, safety glasses.
Materials: Replacement window, exterior-grade caulk, brick sealant, flashing tape, shims, wood blocks (if necessary), and weather stripping.

Removing the Old Window

This step requires patience and care. Damaging the brickwork can be costly to repair.

1. Removing the Interior Trim

Carefully remove the interior trim around the window using a pry bar and putty knife. Take photos as you go to help with reinstallation. Be gentle to avoid damaging the trim. If the trim is severely damaged, consider replacing it during the project.

2. Removing the Old Window Frame

This is where things get tricky. The old window frame is likely secured with mortar.

Exterior Work: Start by carefully removing the exterior caulking around the frame. Gently pry the frame away from the brick, working slowly and steadily. You may need a chisel to carefully loosen stubborn mortar.
Interior Work: Once the exterior is loosened, repeat the process from inside the house. Work systematically, taking your time. Be mindful of potential damage to the interior wall.

3. Cleaning Up

Remove all debris and loose mortar from the window opening. A wire brush can help clean the brickwork. Ensure the opening is clean and free of obstructions.

Installing the New Window

This stage requires precision and attention to detail for a proper seal.

1. Preparing the Window Opening

Check the dimensions of the new window against the opening. Use shims to ensure the window sits perfectly level and plumb. This is crucial for proper drainage and preventing leaks.

2. Installing Flashing

Apply flashing tape around the exterior perimeter of the new window. This prevents water intrusion. Overlap the tape for added protection. Ensure a proper seal.

3. Securing the New Window

Carefully insert the new window into the opening. Securely fasten it in place according to the manufacturer's instructions, using appropriate screws or fasteners. Don't overtighten.

4. Caulking and Sealing

Apply exterior-grade caulk to seal the gaps between the window frame and the brickwork. Use a caulking gun for a neat and professional finish. Smooth the caulk with a wet finger. Allow the caulk to cure completely before painting.

5. Installing Interior Trim

Once the caulk is dry, reinstall the interior trim. Ensure it is level and securely fastened. Caulk any gaps between the trim and the wall.

Final Touches

Painting: Re-paint the trim to match your existing décor. Paint the exterior window frame if needed.
Cleaning Up: Dispose of all debris responsibly.
Inspection: Carefully inspect your work. Check for drafts or leaks.

This guide provides a general overview. The specific steps might vary depending on the type of window and the construction of your house. Always refer to the manufacturer’s instructions for your specific window. Remember to prioritize safety and take your time. If you are unsure about any part of this process, consult a qualified professional. Replacing a window properly will improve your home's energy efficiency and curb appeal.