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Repairing and reglazing home windows: step by step details

Repairing and reglazing home windows is a manageable DIY project that can enhance insulation and aesthetics. Here’s a step-by-step guide:


1. Assess the Window

  • Check for Damage: Look for cracked or broken glass, deteriorated glazing, or loose panes.

  • Determine the Frame Type: Wooden and metal frames require different tools and techniques.


2. Tools and Materials Needed

  • Putty knife

  • Glazier’s points

  • Glazing compound or putty

  • Heat gun or hair dryer

  • Paint scraper

  • Sandpaper (medium and fine grit)

  • Glass cleaner

  • Replacement glass (if needed)

  • Safety gloves and goggles

  • Paint or primer (if required)


3. Remove the Old Glazing

  • Protect Yourself: Wear gloves and goggles to prevent injury.

  • Soften Old Glazing: Use a heat gun or hair dryer to soften hardened glazing putty.

  • Remove Putty: Scrape away old putty with a putty knife or paint scraper.

  • Remove Glazier’s Points: Carefully pry out the metal points holding the glass in place.

  • Take Out the Glass: Lift out the damaged or old glass gently. If the glass is broken, remove pieces carefully.


4. Prepare the Frame

  • Clean the Frame: Scrape off remaining putty and debris.

  • Smooth the Surface: Sand the frame to create a smooth surface for new glazing.

  • Prime (if Wooden): Apply a wood primer to protect against moisture and ensure a good bond.


5. Measure and Cut Replacement Glass

  • Measure the Opening: Measure the width and height of the frame and subtract about 1/8 inch for expansion room.

  • Cut the Glass: Have a hardware store cut the glass to size, or use a glass cutter if you’re experienced.


6. Install the Glass

  • Apply Glazing Compound: Roll glazing compound into thin ropes and press them into the frame to form a bedding for the glass.

  • Position the Glass: Set the glass into the frame, pressing gently but firmly to secure it.

  • Insert Glazier’s Points: Push glazier’s points into the frame every 6 inches to hold the glass in place.


7. Apply New Glazing Compound

  • Prepare the Putty: Knead the glazing compound until pliable.

  • Shape and Apply: Roll the putty into ropes and press it around the glass edge.

  • Smooth the Surface: Use a putty knife to create a smooth, angled bead along the edges.


8. Let the Glazing Cure

  • Allow the glazing compound to cure according to the manufacturer’s instructions (typically 7-14 days).


9. Paint the Frame

  • Choose Weatherproof Paint: Use paint that’s suitable for exterior windows.

  • Cover the Glazing: Extend the paint slightly onto the glazing compound to seal the edges and prevent water intrusion.


10. Clean the Glass

  • Use a glass cleaner and a lint-free cloth to clean off any smudges or residue.


Tips for Success

  • Work in Good Weather: Choose a dry day with moderate temperatures for best results.

  • Use Quality Materials: Invest in high-quality glazing compound and glass for durability.

  • Take Time for Finishing: Proper smoothing and painting will enhance the window’s longevity and appearance.


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