How to Fix a Sagging or Dragging Garden Gate
Diagnose why a garden gate drops or drags, then fix it with hinge adjustment, a diagonal brace, a new post or a gate repair kit, and learn when to replace it.
A gate that drags on the path, will not latch or hangs at an angle is a daily irritation. It is also a security issue if it no longer closes. Fortunately, most sagging gates can be put right with a little diagnosis and a few fixings, long before replacement is needed.
Why gates sag
Three things usually cause the problem:
- The gate frame has dropped out of square. Timber joints loosen, and the weight of the gate drags the outer corner downward.
- The hinges have loosened or worn. Screws pull out of rotting wood or the hinge pins wear.
- The post has moved. A hinge post that leans or has worked loose in the ground makes the gate drop however good the gate is.
Work out which by standing back. Does the whole gate tilt (post movement), or does the frame look like a parallelogram (frame sag)?
Check the post first
Push the hinge post firmly. If it moves at ground level or leans towards the gate, fix the post first, or any gate repair will be undone.
- Small movement: pack the base with rubble and a fast-setting post mix, using braces to hold it plumb while it cures.
- Rotten base: a post repair spur or replacement post may be needed. See how to repair a fence panel, which covers setting posts.
- Masonry pillar: loose bricks or mortar need a builder's repair.
Square the gate
If the frame has dropped:
- Lift the gate off its hinges, or support the free end with a block.
- Check the joints. If they are loose, apply exterior wood glue and clamp or screw corners with galvanised angle brackets.
- Add a diagonal brace running from the bottom of the hinge side up to the top of the latch side. This is the correct direction: the brace should be in compression, carrying the weight to the hinge post. Many gates fail because the brace goes the wrong way.
- Check the gate is square by measuring corner to corner; both diagonals should match.
For a tired timber gate, a gate repair kit, which is a tensioned wire and turnbuckle, can pull a sagging gate back into square.
Fix or replace the hinges
- Tighten screws. If holes are stripped, fill with glue and dowels, or use longer screws.
- Replace worn hinges with heavier ones. Use T-hinges or strap hinges suited to the weight.
- Use galvanised or stainless fixings that resist rust.
- Adjust height by packing hinges with spacers or shifting the gate on the post.
Re-set the latch
After correcting the sag, check the latch and keep line up. Move the keep or adjust the latch on the gate. If you need to fit a new latch, see how to fit a gate latch.
Protect it
Treat the timber with preservative or paint, particularly at the bottom edge and end grain. Keep the base of the gate from touching soil or wet leaves, and consider a gravel board. Trim vegetation that pulls on the gate.
When to replace the gate
Replace it when:
- The timber is soft or rotting through
- The frame is split in multiple places
- Repair costs approach the price of a new gate
- The design is too light for its size
A new gate may be quicker to fit than you expect, although it needs the posts to be sound and the opening measured accurately.
Costs
A handyman can often adjust and re-hang a gate in an hour or so, with typical prices around the lower end of handyman hourly rates. Post replacement and a new gate cost more, and vary with region and materials.
Getting help
On Compito you can enter your postcode, send photos of the gate and post, compare offers from ID-verified local providers, ask questions by message, pay online when you accept and leave a review afterwards.
A quick diagnostic you can do in five minutes
- Stand back and check whether the hinge post leans.
- Open the gate and let it swing. If it drops as it opens, the hinges are the issue.
- Hold the gate half open and push down on the free end. If the frame flexes, the joints are loose.
- Measure the gaps at top and bottom on the latch side. If one is much bigger, the gate is out of square.
Write down the result. It tells you whether to start with the post, the frame or the hinges, and helps a handyman give you an accurate price.
Common mistakes
- Adding a diagonal brace in the wrong direction.
- Fitting thin screws into rotten timber so the hinge pulls out again.
- Replacing a gate without addressing a leaning post.
- Leaving bare timber at the bottom to soak up water.
A worked example
A 90 cm timber gate drags on the path. The post has a slight lean, the frame has dropped by around a centimetre and one hinge screw has stripped. A handyman resets the post with fast-setting mix, squares the frame with a repair kit and fits heavier hinges. That could be a typical £60 to £140 job depending on region and materials, which is far less than a new gate and posts.
Making the repair last
Give the post and mix at least the cure time on the pack before re-hanging a heavy gate. Re-treat exposed timber annually, and check hinge screws each spring. If you share the gate with a neighbour, mention what you are doing; see how to repair a fence panel for notes on who is responsible for boundaries.
Frequently asked questions
Why does my gate drag only in wet weather?
Timber swells when damp, and soil or the path may also heave. Planing a bit off the bottom or adjusting the hinges often solves it.
Which way should a gate brace go?
It should run from the bottom corner on the hinge side up to the top corner on the latch side, so it acts as a strut rather than a tie.
Can I fix a metal gate myself?
Light adjustments, such as hinge nuts and latch alignment, are straightforward. Welding or major repair belongs to a metalworker.