Step 1

Freeing Stuck Wooden Windows

Wooden windows can swell in wet weather. Try rubbing candle wax along the sticking edge of the window. If that does not work, plane away some wood as shown in image 1. You can plane the opening edge of a casement. Take off enough extra wood to allow for painting.

Unscrew the casement from its hinges so that you can plane the sticking edge.
Tap a screwdriver with a hammer to free painted-in screws (image 2).

Movement of wood due to damp weather can also make fasteners difficult to close, or lead to loose, rattling windows. Fix the problem by adjusting the positions, as if you were installing from scratch. If adjustment only requires minimal movement, you may have to move the fastener so you can attach into solid wood.

Step 2

Repairing a Rotten Sill

If a small area of a wooden sill is rotten, but the rest of the window is sound, you can just replace this part of the sill.

Cut back the sill to sound wood (image 1). Use it as a template for the patch. Mark the position of the groove under the sill (the drip groove).

Cut the patch slightly larger than the rotten section you removed. Use a router to cut out the drip groove. Screw the patch in place and then plane it smooth. Make sure to countersink the screws so they won't be in the way of the plane.

Other wooden frame repairs
Another option for fixing loose joints is to strengthen them with dowel.
If a whole section of your window is rotten, then pry the piece out and make a replacement, using the old section as a template. If rot is more widespread, you should replace the entire window.

Step 3

Adjusting a Mortise-Plate

If the mortise-plate for a mortise-type catch is poorly fitted, it makes the catch difficult to use and can prevent it from holding the window closed securely. Remove the mortise-plate and refit it properly.

Unscrew the mortise-plate from the window frame (image 1).

Reposition the mortise-plate. Draw around the outside and the inside of the mortise-plate with a pencil (image 2).

Use a chisel to adjust the size of the mortise if necessary. Reattach the mortise-plate and check that it fits snugly (image 3).

Step 4

Maintaining Vinyl Windows

Vinyl windows need little maintenance, apart from washing to keep them clean. Hinges may sometimes need lubricating, and occasionally you might need to replace a catch.

Broken catch
Pry off the fixing cover with a screwdriver then remove and replace the catch.
The screw is often covered

Stiff friction hinges
Lubricate metal hinges with low-viscosity oil. Spray plastic hinges with polish containing silicone.

Cleaning vinyl
With warm water, remove as much dirt as possible. Use a mild detergent on stubborn marks, then rinse well, especially the seals. Some cream cleaners can be used on vinyl, but keep them off the seals and rinse very thoroughly. Some cleaners are only suitable for smooth, white vinyl, not wood-grain effect types. Never use an abrasive cleaner on vinyl.

Step 5

Removing Glass Safely

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Broken glass can cause serious injuries. Always wear protective gloves, work boots, and goggles when you are removing glass from a window. Remove the glass safely and clean old putty and fixings from the rabbet, as shown here , before reglazing.

The technique for glass fixed with glazing beads is similar. Tape the glass before prying off the beads (you can reuse them). You should be able to free the pane from any glazing silicone fairly easily by cutting around the silicone with a craft knife. With the glass removed, scrape out the old caulk, prime any bare wood, and reglaze.

Apply strips of masking tape over the surface of the window pane to prevent shards from falling when you remove the remaining glass (image 1).

Protect surfaces below the window with drop cloths to catch broken glass. Tap the glass with the butt of a hammer to loosen it (image 2).

Carefully remove the loose, large sections of glass first, then pick out the smaller shards. Dispose of broken glass safely (image 3).

Use a hacking knife or old chisel to remove the old putty and stubborn pieces of glass from around the glazing rabbet (image 4).

Remove any old pins or glazing sprigs using pincers or pliers (image 5).

Dust off surfaces. Use an exterior wood primer on any bare wood before installing a new pane of glass (image 6).

Step 6

Replacing Glass in Lead Lights

You can repair single-glazed lead lights using caulk sealant. Take a cardboard template to a specialty supplier to buy replacement glass. Caulk can also be used to repair old putty.

Carefully fold up the lead around the broken pane using the end of a chisel. You may find this easier if you run a craft knife under the lead first (image 1).

Apply a continuous bead of caulk sealant, using a dispenser, around the folded lead (image 2).

Position the new pane. Fold the lead back in place and smooth its edge flush with the glass surface. Remove excess sealant with a cloth

Step 7

Removing Vinyl Bead Trim

With beaded and double-glazed units try to remove the trim carefully so they can be reused. Only carry out DIY work on old double-glazed units—if they are still under guarantee, get the manufacturer to repair them.

Work a scraper blade under the edge of the first bead.

Pry up the bead so you can position a packer underneath, beside the scraper. Insert another packer on the other side of the scraper.

Move the packers outward to unclip the bead from the frame. Repeat for all beads. Remove the double-glazing unit carefully.