Common security screen door problems, symptom by symptom

The short answer: check how the door hangs before blaming a part

A security screen door is a set of parts that have to line up. Hinges or rollers carry the door, a closer or a track guides it, and the lock has to meet its strike plate or keepers. When one of those parts moves, the symptom often shows up somewhere else. That's why Austral Lock's first test for a lock fault is to work the lock with the door open. If it works correctly then, their instructions say, there's a fitting problem.

The same logic runs through this guide. A door that won't stay shut, a closer that slams, or a slider that scrapes is often a door that has moved out of its clearances. Austral Lock's annual check asks for exactly that: a door that operates with the correct clearances and opens and closes without obstruction.

The National Security Screen Association (NSSA) gives the reason to tread carefully. Compliant security screen doors, it says, are made and installed to very tight tolerances with specialised fixings.

Symptom to cause: match what the door is doing

Start with what you can see and hear, then use the table below to find the likely cause, the owner check that's safe to try, and the point where it turns into a repair job. Treat these as causes to rule in or out, not a diagnosis. If a door shows two symptoms at once, such as dragging and not latching, deal with how the door hangs first, because that fault can cause the other one.

Two checks cost nothing and can narrow a fault down quickly. First, open the door and work the lock. If it behaves with the door open, the problem is in the fitting rather than the lock. Second, swing the door slowly from fully open to shut and watch it. A door that catches, scrapes or springs back before it latches is showing you where it binds. On a slider, listen for grinding and look along the bottom track for grit, a dent or standing water.

Hinged doors that drag, slam or won't latch: check the swing first

A hinged security door that drags, won't latch or slams may have changed how it hangs or how it's being closed. Austral Lock is specific about latching. On its Elegance XC lock, a door that won't lock or won't stay closed indicates the auxiliary (trigger) bolt isn't being tripped as the door shuts. The fix is to bring the gap between door and strike plate to no more than 3 mm, by packing the hinges or the strike plate.

Slamming and creeping point to the closer, or to a door that doesn't swing freely. On Lockwood's 404 hydraulic closer, which suits hinged screen and security doors up to 29 kg, speed is set by rotating the main body of the closer, following the arrows for faster or slower. Other closers adjust differently, so check the instructions for yours.

Lockwood also says the door must close freely before a closer goes on. If the door binds with the closer unhooked, turning the closer won't fix it. That's a hanging fault, and packing or re-hanging a security door is a repair job.

Sliding doors that stick, scrape or jump the track: start with the track

On a sliding security door, look at the bottom track first, because that is where grit and water collect and where the rollers do the work. SCREENGUARD's cleaning advice is to clear the bottom track and any drainage slots, noting that standing water against a frame is a slow problem. A&L Windows recommends vacuuming tracks regularly and a yearly light dry silicone spray, and WD-40 Australia suggests silicone spray to keep a sliding door track moving, used sparingly or as a dry version in dirty spots.

If the door scrapes, stop using it until it's sorted. A&L Windows warns that running a door that's scraping on its track will cause scoring and possible failure of the rollers.

A slider that jumps or runs rough may have a roller fault. Rolltrak, which supplies replacement screen door rollers, says bent or broken rollers need replacing, and that new rollers can fix a door that no longer slides smoothly without replacing the whole door. Our guide to putting a sliding screen door back on track covers adjusting and re-hanging step by step.

Locks and keys: test with the door open before blaming the lock

A security door lock that won't work is often a fitting fault with the lock itself still sound. Austral Lock's rule is to operate the lock with the door open first. If it works correctly, the problem is in the fitting. If it fails with the door open too, the cylinder or the lock body is more likely at fault.

For a stiff key, Gainsborough, which makes Austral Lock hardware, says not to put oil or aerosol lubricant in the cylinder, and suggests a small amount of graphite on the key instead. It also notes that an extreme climate or a dusty environment can affect the lubricant its door hardware leaves the factory with, so a lock that once turned freely can stiffen.

The NSSA describes a 3-point lock as securing the door at the top, middle and bottom, so each bolt has to meet its own keeper. A triple lock that catches at one point only is worth checking against how the door sits. Austral Lock states its lock assembly is lubricated for life and shouldn't be taken apart by the user. Our lock troubleshooting guide goes through each lock symptom.

Mesh, frame and finish: salt is the slow problem in Cairns

Near the sea, salt left on the surface is the slow threat to mesh and frames. The Australian Stainless Steel Development Association (ASSDA) describes tea staining as discolouration of stainless steel by corrosion, a cosmetic issue that doesn't affect structural integrity, most common within about five kilometres of the surf. It adds that tropical and high humidity areas are more at risk.

Frames and hardware need washing too. Dulux Powder Coatings says powder coat in coastal regions needs a more frequent cleaning program, using a mild detergent to remove dust, salt and other residues. Austral Lock puts that at every two to three months in coastal areas. SCREENGUARD's schedule within 5 km of the coast is a wash every 2 weeks, and maintenance with SCREENGUARD PowaWash is a condition of its 10 year warranty. SCREENGUARD also points out that a door under a deep verandah or eave never gets rinsed by rain, so deposits build up there between washes.

Physical damage is a separate fault. SCREENGUARD warns that mesh is tensioned in its frame and a pressure washer can distort it. Our cleaning guide covers the routine, and our guide to torn fly screen and security mesh covers holes and tears.

How one fault leads to another

Security door faults can chain together, which is why fixing only the visible symptom may not last. Three chains follow from the makers' own instructions.

A hinged door that drops or moves out of its clearances widens the gap at the strike plate. Austral Lock's fix for an Elegance XC door that won't lock or stay shut is to bring that gap back to no more than 3 mm, because the trigger bolt isn't being tripped. A hinge problem shows up as a lock problem.

A closer adjusted on a door that binds is fighting the door. Lockwood says the door must close freely before the closer goes on, so a door that slams or stalls can be a hanging fault in disguise.

A slider left scraping on its track scores the track and wears its own rollers, which A&L Windows warns can lead to roller failure. Grit in the track adds to the wear, and standing water against the frame is a slow problem of its own. Sort out the cause first, then the symptom, and the same repair is less likely to come back.

What you can check yourself, and where to stop

Owner checks are cleaning, looking and small adjustments made with the door in place. Anything that means taking the lock apart, lifting a door off its track on your own, or re-hanging, packing or refitting the door is repair work. Austral Lock says its lock assembly shouldn't be disassembled by the user, and Rolltrak's own roller swap starts with a second person to help lift the door.

Fitting is trade work. In Queensland, the QBCC lists fabricating and installing security screens and doors within its glass, glazing and aluminium licence class, and the NSSA recommends installation by a member rather than DIY. Never cut or alter security mesh to make a door fit. These checks are safe to try first:

• Work the lock with the door open, then with it shut, and note the difference.
• Look for hinge screws that are plainly loose and give them a gentle turn.
• Wipe the strike plate with a soapy rag, which Austral Lock lists as a quarterly job.
• Vacuum or clean the sliding track and clear the drainage slots.
• Put a little graphite on a sticky key, and keep oil out of the cylinder.
• Wash mesh and frames with mild detergent and rinse, with no pressure washer.
• Stop using a slider that scrapes until someone has looked at it.

Repair or replace: what we fix onsite around Cairns

Many of these faults can be fixed with parts rather than a new door. We repair at your property around Cairns, replacing lock cylinders or complete locks, the wheels and track work on sliding doors, and door closers, hinges, triple locks and patio bolts. We also fit pet doors to existing security doors, though cutting one in affects the door's compliance, so read about pet doors in security screens before you decide.

When you book, tell us what the door is doing and what you've already checked, such as whether the lock works with the door open. Describe it through the quote form on our contact page, and see what a visit covers on our onsite repairs page.

If the frame is past saving, our doors and screens are made to measure and manufactured in Cairns, so a replacement is built to your opening. We work across the region; check the areas we serve.