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How to Repair French Doors
French doors can be an elegant way to connect outdoor and indoor spaces. They are susceptible to problems over time, which require immediate attention to ensure safety and functionality.
Warping, sagging and misalignment of the sash and frame of the door are common problems. Fortunately, the majority of these issues can be repaired with a bit of time and effort.
Locks that are not aligned
Sometimes doors are stuck or misaligned because of humidity, wood swelling or the house sinking. This could cause the bolt of the lock to be awry and making it more difficult to open or close the door. This also puts extra strain on the lock, which can eventually lead to mangled inner-lock components or broken locks altogether. It's a common problem that can often be solved with simple DIY techniques.
In some cases there are times when a tiny amount of lubricant might be enough to make the door easier to open and close. You can apply graphite as a lubricant, but make sure to choose one that is safe for your door. Before applying the lubricant wipe the area around the door with a damp rag to remove any obstructions.
A door that is hanging off-center can be easily repaired by loosening and adjusting the hinges until they are in line with the frame. You must be careful not to tighten the screws too much as this could cause damage to the hinges or door.
If your external French doors aren't closing properly, this could indicate that there is a problem in the lock mechanism. This is usually caused by the short screws of the factory that come undone with time. To fix this issue, replace the screws with longer ones that grip more of the door frame wood.
You can also adjust the lock, but it's more complicated and difficult. Begin by loosening the lock knob or handle using a flathead screwdriver. Then, you can remove the lock assembly from its cubbyhole, by unscrewing and taking it out. Check for obstructions, then reassemble the lock and tighten all the screw connections.
If the latch doesn't touch the strike plate, you might have to move the strike plate or expand it. If the strike plate is smaller or higher than the hole for the latch, this could prevent the lock from closing and may require the assistance of a locksmith. If the hole is tiny you can make use of a metal file to enlarge it.
Sagging
If your doors are creaking or have gaps between them, it can affect the insulating properties of your home and reduce the efficiency of its energy use. These gaps can also block views and cause drafts. Fortunately there are simple solutions to help solve these problems.
In the beginning, tighten your hinges to ensure they're properly aligned. This should take about 10 minutes, and no tools are required. If this doesn't fix the issue then you'll need to replace your hinges. They're likely to be to be nearing the end of their lifespan.
Over time the French doors can become loose due to the weight. To avoid this make sure you tighten all the hinges on your door and check them frequently to ensure that they are still secure. At times, you should grease the hinges with an oil-based spray to prolong their life.
The hinges that are old or damaged can cause a door to slide, so replacing hinges with new ones could aid. A new doorknob or freshly painted doors, can affect the sloping of your French doors.
Other causes of sagging include foundation settlement, wear on hinges or improper modifications made to your doors. You can fix a door that is sagging by tightening or changing the hinges.
It is also important to examine the weather stripping on your doors to make sure they are functioning correctly. If they're not working, you can remove them and replace them.
Finally, you should regularly examine the wood of your door frame for signs of warping or rotting. These issues can create a draft and will not only reduce the efficiency of your doors, but can also cause water leakage as well as other damage within your home.
If your doors are sliding and you've tried the first two solutions, it is likely that you'll have to smooth down the jamb of your door using a hand plane, advises Popular Mechanics. To do this, take your doors from their hinges. Lay them flat on something sturdy like a sawhorse. Note the areas that require smoothing, then use a plane to smooth these areas.
Leaks
The large areas of glass on French doors can be a frequent source of water leaks, especially if you live in a region that receives significant rainfall. If left untreated, these leaks could cause the frame of the door to become rotted and also the surrounding structure. It is relatively simple to repair these leaks, and it should only take a few minutes.
Leaks can be caused by a variety of causes that include:
A broken seal

Replace the rubber seals on either side of your threshold with new seals. This will ensure that there is an exact fit and stop rainwater from entering your home.
repairing french doors is leaking through the sill
This problem can be caused a number of ways such as the absence of a sillpan or by using a sill made of metal that isn't watertight. If you notice that water is accumulating around your French doors, it is important to contact the builder and ask for the installation of a sill pan or to replace the sill made of steel by an alternative made of wood that will resist water.
Obstructions
A faulty seal can also result in fog accumulating between the two panes of glass on French doors, which block the view and reduces their energy efficiency. The issue can be solved by replacing the old seal with a newer one that blocks moisture and air.
Loose Handles
A handle that is loose could be dangerous because it could fall when you are closing or opening your French door. By tightening the screws on the handle could resolve this issue, or you could simply replace the handle entirely if it's damaged or worn out.
A track stop that is not properly installed can also cause doors to become jammed and scratch the frames. Adding some silicone caulk to the tracks or track stops could aid in solving this issue. It's also a good idea to check for cracks regularly and wear on the exterior surfaces of the frames and doors to ensure they remain in top condition.
Warping
If you are not careful If you're not careful, your French doors may begin to warp due to exposure to moisture or heat. If this happens, you should consider hiring a handyman who specializes in repairing French doors. They will be able to advise on the best way to repair your doors and make sure that they are safe to open and close.
If your doors are badly damaged, you may need to replace them completely. If they're only slightly warped, you might be able to straighten them by placing damp towels over the affected area. Place the towels on the door for a few days or even longer until they are completely flattened.
This method can be used to fix uPVC or wood doors, provided that the wood has been well-seasoned. It is important to remember that this process can be lengthy and difficult to achieve, especially if the doors are very warped.
The doors could warp if they have been stored incorrectly. They should be kept away from building works that generate a lot of humidity like decorating or plastering work. They should be kept in a flat place on a firm surface.
A damaged strike plate could also cause warping. To correct the issue it is necessary to take your doors off and place them on a pair of sawhorses. The wood that is left over can be removed from the bottom and top edges of each door with hand planes. It is best to work in small increments to avoid taking too much wood from the doors. This could cause them to become thin and brittle.
Once the doors are put back up, you can screw the strike plate back into place. If the lock still doesn't work the barrel catch could be catching against the side of the frame. This is typically repaired by applying silicone spray. If that doesn't work, the latch might require replacement.