When a shed door that closed fine a year ago starts sticking or will not latch, the door is usually the messenger, not the problem. The most common cause is the base moving: a corner settles, the frame goes slightly out of square, and the door no longer meets its latch. Wood doors also swell in damp weather, and hinge screws work loose. Check level and square before you plane, sand or move the latch.
Moving the latch works for a week. Fixing what moved works for years. Here is how to tell which problem you have.
Why a shed door won't close after a year
Almost every stuck shed door comes down to one of five causes:
- The base settled or shifted. One corner drops, the frame racks, and the door opening is no longer square. Keter, a major shed maker, warns in its shed foundation guide (read September 11, 2026) that "even a small slope can cause doors to stick, water to pool or the shed to lean."
- Wood movement with the seasons. Wood swells when it is damp and shrinks when it dries. Shed Solutions, a shed builder, lists this first on its help page for a sticking door (read September 11, 2026): "Temperature and humidity changes cause slight swelling; this often resolves on its own."
- Loose hinge screws. Shed Solutions' fix: "Tighten or replace." A door that drops a little at the latch side often starts here.
- Paint build-up or swelling at the edge. Shed Solutions: "Light sanding and repainting can help."
- Track or threshold problems. Sliding doors on metal sheds jam when the track bends or fills with debris.
The first one is the most common on sheds that are a year or two old, and it is the one most people fix last.
Read the gap: where the door rubs tells you what moved
Before you reach for a tool, close the door as far as it goes and look at the gap all the way around it.
| What you see | What it usually means |
|---|---|
| Rubs at the top on the latch side, gap at the bottom on the latch side | The door has sagged, or the hinge side of the frame has dropped |
| Drags on the floor or threshold | The floor has dropped under the door, or the door has sagged |
| Double doors meet with one higher than the other | One side of the base is lower than the other |
| Gap is even, but the latch misses its catch | The frame has shifted slightly sideways; often a base problem |
| Sticks only in wet weather, fine when dry | Wood swelling, not structure |
| Sliding door stops partway | Bent track, debris in the track, or the shed has racked |
| Hinge side shows a gap that grows at the top | Hinge screws loose or pulling out of the frame |
Rub marks help. Worn paint, shiny spots on metal or scuffs on resin show exactly where the door is hitting.
Check level and square
You need a level, a tape measure and a helper. Do this before any fix.
- Check the floor at the door. Lay the level across the threshold, then front to back just inside the door. The bubble tells you which side is low.
- Check the corners of the base. Where you can see the base, check it at each corner. On a gravel base, look for dips; on blocks or pavers, look for one that has sunk or tilted.
- Measure the door opening's diagonals. Measure from the top left corner of the opening to the bottom right, then top right to bottom left. If the two numbers match, the opening is square. If they differ, the frame has racked, and the longer diagonal points toward the corners that have spread apart.
- Check the walls for plumb near the door with the level held upright.
If the floor is level and the opening is square, the problem is in the door itself: hinges, swelling or sag. If not, the base is the cause, and the door will keep sticking until the base is fixed.
Fix it in order: cheapest check first
Work down this list in order, the same way we approach a lawn sweeper brush that stops spinning: rule out the cheap, quick causes before you start on the expensive ones.
1. Tighten the hinges
Tighten every hinge screw. If a screw spins without biting, the hole is stripped; a slightly longer or thicker screw of the right type, or the maker's replacement hardware, usually fixes it. On resin and metal sheds, use the hardware from the manufacturer's parts list, and do not overtighten into plastic.
2. Clean the track and threshold
For sliding doors, clear leaves, grit and nesting material from the track, and check it is straight. For hinged doors, check nothing has built up on the threshold or under the door.
3. Wait out seasonal swelling, then seal
If the door only sticks after rain or in humid weeks, and the floor is level and the opening square, it is wood movement. Shed Solutions notes it "often resolves on its own." Once the door is dry, lightly sand the tight edge and repaint or seal all edges, including the top and bottom, which are easy to miss and let water in.
4. Re-level the base
If your checks showed a low side, this is the real fix.
- Empty the shed first. Stored gear adds a lot of weight and makes lifting unsafe. Our guide to storing a tow-behind lawn sweeper through the off-season has a good routine for getting heavy equipment out, dry and back in.
- Follow your shed's manual. Resin and metal sheds are kits, and the maker may advise loosening or removing panels rather than lifting the whole shed.
- Lift with care, and never reach under. For a wood shed on skids, lift one side at a time at a solid point with a jack on a firm footing, support it on solid blocking straight away, and never put your hands, feet or body under a raised shed. Use at least two people.
- Shim with rot-proof material. Use plastic or composite shims, or treated lumber rated for ground contact. Untreated wood shims will rot and settle again.
- Fix why it moved. If a corner sank because water pools there, regrade so water runs away from the shed. If the base was never compacted, it will keep moving until it is rebuilt.
When the base is level and the diagonals match, close the door. On many sheds it simply works again.
5. Brace a sagging wood door
Wood doors built from boards sag when they lack a diagonal brace. A brace should run from the bottom corner on the hinge side up to the top corner on the latch side, so it pushes up on the latch side. Add one, or add a second if the existing one has come loose.
6. Adjust the latch last
Only once the base is level and the door is sound should you move the latch or strike plate. If you move it first, you are hiding the problem, and it will return as the base keeps moving.
Resin, metal and wood doors fail differently
- Resin: the panels depend on a flat floor to stay square, so resin doors are sensitive to small base movements. Keter's warning that a small slope can make doors stick applies most strongly here. Fix the base, not the door.
- Metal: sliding doors on tracks are the usual trouble spot. A bent track, grit in the channel, or a racked frame will jam them. Dents near the door opening can also stop the door clearing.
- Wood: doors swell and shrink with the weather, sag without bracing, and hinges pull out of softening wood. Wood doors are the easiest of the three to repair.
Stop it happening again
- A proper base. A level, compacted, well-drained base is the single best prevention. Grass or loose dirt under a shed almost guarantees door trouble within a year or two.
- Water away from the shed. Check the ground slopes away and nothing, including a downspout, empties beside it.
- Spread the weight. Heavy items parked on one side of the floor, month after month, put more load on that side of the base. Store the heaviest things near the walls, spread evenly.
- Mind what rolls over the threshold. Wheeling heavy equipment in and out works the threshold and the floor frame near the door. A ramp helps. If you are still choosing equipment, the storage demands of a heavier machine are part of the comparison in tow-behind vs push lawn sweepers.
- Watch winter to spring. If the door binds in cold, wet months and frees up in dry weather, the ground under the base is moving with the seasons. Better drainage under and around the base is usually the answer.
When it is not a DIY fix
Stop and call for help if the concrete slab under the shed has cracked or tilted, the shed frame is visibly bent or damaged, the roof has started leaking at the corners, or the shed is too large or heavy to lift safely. A shed installer, a general contractor or, for a cracked slab, a concrete contractor is the right call. If the shed is under warranty, contact the maker before you lift or modify anything; Shed Solutions, for one, asks owners to contact it for severe misalignment or frame shifts.
Frequently asked questions
Why won't my shed door close all of a sudden? If it happened after rain or a humid spell, a wood door has likely swollen, and it may free up as it dries. If it came on gradually over months, the base has probably settled and the frame is out of square. Check the floor with a level and compare the diagonals of the door opening.
How do I fix a shed door that drags on the ground? First tighten the hinge screws, since a loose hinge lets the door drop. Then check whether the floor has dropped under the door with a level. If the base is low on that side, re-level it with rot-proof shims or rebuild that part of the base. On a wood door, add or tighten the diagonal brace.
Should I just move the latch on my shed door? Only as the last step. If the base has moved, moving the latch hides the problem for a while and the door drifts again. Level the base and fix the door first, then adjust the latch if it still misses.
Why do resin shed doors stop lining up? Resin sheds depend on a flat, level floor to hold their shape, so a small drop at one corner is enough to misalign the doors. Keter warns that "even a small slope can cause doors to stick." Re-leveling the base usually brings the doors back into line.
Yard Insight has not tested shed doors or bases, and this article makes no claim otherwise. No product is ranked or linked for sale. Keter and Shed Solutions are quoted only as publishers of the statements above, read September 11, 2026.
