Doors that won’t close and windows that won’t open are among the most common and frustrating household problems. They’re also among the most fixable — with a few tools and some diagnosis, you can resolve the majority of door and window issues in an hour or two.
A sticking door is almost always caused by one of three things: settling, humidity, or hinge problems. Before attacking it with a plane, identify the cause.
Open and close the door slowly and watch carefully where resistance occurs. Use a piece of chalk on the door edge — the chalk will transfer to the frame at the contact points. Common stick locations:
A loose hinge is the most common and easiest fix. Check every screw. If screws turn freely without tightening, the wood has stripped.
Fix for stripped hinge screws: Remove the screw. Pack the hole with wooden toothpicks dipped in wood glue. Let dry. Break off the excess. Drive the screw back in — it’ll grip the toothpick wood firmly.
For badly stripped holes, longer screws (3-inch) that reach the structural frame stud are a more permanent fix for door hinges.
If the door doesn’t latch properly, the strike plate may be misaligned. Try closing the door slowly and watch where the latch bolt makes contact with the strike plate. If the latch just barely misses:
For small misalignments, file the strike plate opening with a metal file to enlarge it. This is faster than moving the entire plate.
If the hinge and latch are fine, the door itself is binding on the frame. Identify the contact area, remove the door (tap hinge pins up and out with a screwdriver and hammer), and sand or plane the binding area.
After removing material, apply a wood sealer or primer to the bare wood — exposed wood absorbs moisture and swells again quickly.
Doors often stick in summer when humidity is high and wood swells. If the door operates fine in winter but sticks in summer, humidity is almost certainly the cause. Options:
Older windows are often painted shut. Run a utility knife along the seam where the sash meets the stop (the vertical strip it slides against). Work around all four sides. If the bottom sash is stuck to the sill, score that joint too.
Once scored, use a putty knife to gently pry the sash away from the stop, working around the perimeter. If the window still won’t budge, score more aggressively. Don’t force it — you’ll break the glass.
After opening, clean the paint from the channel and rub a candle or bar of soap along the tracks to lubricate them.
Broken sash cords or worn balance springs are the usual culprits in older windows. For modern windows with spring balances:
Most double-hung window locks (sash locks) are simple cam-style latches that screw into the sash. When the mechanism wears out or breaks:
For crank-operated casement windows, the lock is usually a simple lever that engages a keeper. If the keeper no longer aligns, loosen the screws and reposition it.
If you see fog or condensation between the glass panes that won’t wipe away, the seal has failed and argon gas (or just the air seal) has been compromised. This reduces insulating value.
Options:
A small hole in a screen is easy to patch with a screen patch kit (about $3 at hardware stores). Peel, position, press.
For large holes or full replacement:
Fiberglass screen is easier to work with than aluminum. Pet screen (made of heavier vinyl-coated polyester) is more durable for households with animals.
Sliding doors often become difficult to operate because of debris in the track, worn rollers, or a bent track.
Track cleaning: Vacuum the track, then scrub with a stiff brush and all-purpose cleaner. Rinse and dry. Rub a silicone spray along the track — avoid petroleum-based lubricants, which attract dirt.
Adjusting rollers: Most sliding doors have adjustment screws at the bottom of the door that raise or lower the roller. Lifting the door slightly helps you adjust without friction. Adjust until the door glides smoothly and hangs parallel to the frame.
Bent tracks: Aluminum tracks are soft and dent easily. Minor bends can be straightened with pliers and a block of wood. A severely bent track may need section replacement.
Replacing door hardware — handles, knobs, locks, deadbolts — is one of the most immediately impactful DIY upgrades.
Before buying, note the door’s backset (distance from the door edge to the center of the existing hole). Standard is 2-3/8 inches or 2-3/4 inches. This determines which hardware will fit.
Deadbolt installation requires drilling two holes: one for the lock body (typically 2-1/8 inch) and one for the bolt (1-inch). Most deadbolt kits include a template that makes this precise. The only tool needed beyond the drill is a chisel for the faceplate mortise.
Strong deadbolts with hardened steel bolts and 3-inch mounting screws into the door stud (not just the door jamb) provide far more security than short screws in soft jamb wood.