1Remove old glass
2 Insert new glass
3 Secure new glass
STRUCTURAL PROBLEMS
201
REPLACING DAMAGED PANE OF GLASS
1Remove old glass
• Put on strong protective gloves and safety glasses.
• If the glass is only cracked, run a glass cutter around the edge about 1 in( 25 mm) from the frame. Place self-adhesive tape across the cracks, then tap the glass with a hammer. It should come away in one piece.
• If the glass is shattered, sweep up the debris, then pry out any loose pieces still in the frame. Use an old chisel and hammer to remove pieces from around the edges, with the old putty. Work from the top of the frame downward.
• Use pliers to extract the glazing sprigs( the tiny nails used to hold the glass in place), then brush the frame to remove small fragments.
• Dispose of the broken glass safely.
2 Insert new glass
• Wet your hands and then knead some putty to make it pliable. Working on the outside of the window, press a continuous putty line all around the edge where the glass will rest using your thumb.
• Place the glass, lower edge first, on to the putty and press it firmly into place, leaving a 1 ⁄ 8-in( 3-mm) gap all around.
Press until the putty squeezes out on the inside of the glass
Press around the edges, not in the middle
3 Secure new glass
• Fix the glass into position with glazing points spaced about 20 cm( 8 in) apart. Tap them gently into the frame with a small hammer, ideally a pin hammer.
Keep the hammer head parallel to the pane of glass
• Remove any surplus putty on the inside edge of the glass with a wet
putty knife( a small, pointed, wide-bladed knife).
• Roll some more glazing putty into a thin sausage and press it into the
join between glass and frame all around the outside of the window.
• Smooth it by holding the putty knife at a 45 ° angle to the frame, with the flat of its blade on the putty, and pulling it along. Miter the corners.
• Allow the putty to dry for at least 2 weeks before painting.
• If the glass is held by beading, apply a strip of self-adhesive plastic foam around the outside edge of the glass before pinning on the beading.
• Repaint the frame, brushing a
1
⁄ 8-in( 3-mm) margin of paint onto the glass to ensure that rainwater will not get behind the putty and into the wood frame.