Yes, professionally made security screens can stop mosquitoes, provided the mesh aperture is fine enough and the screen is fitted without gaps. The deciding factors are mesh hole size and installation quality, not the security function itself. Standards such as AS 5039.1:2023 and public-health guidance both point to the same conclusion: a correctly specified, well-fitted screen does double duty as a barrier against forced entry and insects.
TL;DR:
- Specify an aperture of 1.0 to 1.2 millimeters; some security weaves exceed 1.5 millimeters and will not reliably exclude mosquitoes.
- Ask the installer to assess existing frames, seal edge gaps, and document interlocks; even fine mesh fails when corners or hardware leave openings.
- Finer mesh blocks smaller insects but can reduce airflow, while thicker wire improves strength at the cost of visibility from indoors.
- Check screens visually every three months, inspect fixings and interlocks every six to twelve months, and repair minor tears or lifted edges promptly.
- Choose stainless steel for coastal or humid sites because it resists corrosion; aluminum is lighter and more affordable for lower risk inland properties.
Table of Contents
- How security screens block insects and how that differs from insect-only flyscreens
- Mesh aperture and material choices that reliably keep mosquitoes out
- Why installation, interlocks and frame fit decide real-world mosquito exclusion
- Routine inspection and simple repairs to keep screens mosquito-proof
- Checklist of questions and specifications to request when getting a quote
- Eastern Security Doors’ view: balancing security performance with mosquito exclusion
- Get a security screen that’s also mosquito-proof
- FAQ
- Sources
How security screens block insects and how that differs from insect-only flyscreens
A security screen is a metal mesh system, usually aluminium, stainless steel or galvanised steel, built primarily to resist forced entry while sitting in a reinforced frame. A standard flyscreen uses lightweight fibreglass or polyester mesh with no security function at all. The two products look similar from across the room, but they’re engineered for different jobs, and that difference matters when you’re trying to keep mosquitoes out.
What actually stops a mosquito is the aperture, the size of each hole in the weave, not the thickness of the wire or the strength of the frame. A security mesh with a tight weave and small aperture blocks insects just as effectively as a purpose-built flyscreen, while also resisting cutting and prying. The wire diameter affects strength and how much light the mesh blocks, but aperture is what a mosquito has to squeeze through.
There’s a genuine trade-off to manage here:
- Finer apertures block smaller insects but can reduce airflow through the screen.
- Thicker wire adds strength but can reduce visibility and make the mesh more visible from inside.
- Very open weaves favour clear sightlines and ventilation but let mosquitoes straight through.
Getting this balance right is a specification decision, not a guessing game, which is why it’s worth discussing visibility trade-offs with whoever is measuring up your doors and windows.
Mesh aperture and material choices that reliably keep mosquitoes out
Public-health and council guidance commonly points to an aperture range of around 1.0 to 1.5 millimetres as the benchmark for excluding mosquitoes, with 1.2 mm x 1.2 mm frequently cited as a suitable standard size, according to Ballina Shire Council’s mosquito management guidance. A mesh aperture of roughly 1.0 to 1.2 mm gives a reliable margin of safety rather than sitting right at the upper edge of the recommended range, which is a sensible target when you’re specifying a security screen that also needs to perform as an insect barrier.
Material choice affects both durability and how well that aperture holds up over years of use:
- Stainless steel mesh offers strong corrosion resistance, which matters in coastal or humid areas, and holds a fine weave without sagging.
- Aluminium mesh is lighter and more affordable, suited to inland properties with lower corrosion risk.
- Brass mesh resists tarnishing and corrosion well but is less commonly used in standard residential security screens.
Not every security mesh on the market already meets a mosquito-proof aperture. Some heavier-gauge security weaves are built primarily for strength and sit above the 1.5 mm threshold, so they’ll need a finer weave specified at the order stage rather than assumed. Stainless-steel security mesh is worth asking about if corrosion resistance and a tight weave both matter to your property.
Why installation, interlocks and frame fit decide real-world mosquito exclusion
A fine mesh with a 1.0 mm aperture does nothing if the frame around it has a 3 mm gap at the corner. Insect exclusion is as much about fit as it is about the mesh itself, and this is where most mosquito-proofing failures actually happen.
Common failure points include:
- Edge gaps where the mesh frame doesn’t sit flush against the door or window frame.
- Weak or distorted frames on older homes that no longer hold a screen square.
- Wrong or missing adaptors when a security screen is fitted to a non-standard frame.
- Poor interlocks between the screen door and the frame, leaving a sliver of open space along the hinge or lock side.
AS 5039.2:2024 sets out installation requirements for security door and window screens, including the obligation on installers to assess existing frames and adapt the fit accordingly rather than installing a standard unit regardless of what’s already there. On older or slightly distorted frames, that usually means adaptors or frame-strengthening members to achieve a flush seal.
When you’re getting a site visit, ask the installer to confirm three things in writing: a flush fit with no visible daylight at the edges, interlock detail at the meeting point between door and frame, and tamper-resistant fixings that won’t loosen the seal over time.
Pro Tip: Ask your installer to photograph the corners and interlocks after fitting, so you have a record of the seal quality if anything shifts later.
Routine inspection and simple repairs to keep screens mosquito-proof
Even a well-fitted screen needs upkeep. Mesh stretches, fixings loosen, and corners can lift slightly as a house settles, and any of those openings lets mosquitoes back in.
A simple inspection schedule covers most of it:
- Quarterly visual checks for tears, sagging mesh or gaps at the corners.
- A fuller inspection every six to twelve months, checking fixings, interlocks and frame alignment.
- Prompt repair of tears, loose tensioning or lifted edges rather than waiting for the next scheduled check.
Correctly fitted insect screening is recognised as an effective non-chemical strategy for reducing mosquito entry into buildings, but only when the screening stays intact and gap-free, as outlined by Housing for Health. A torn or loose screen stops doing its job quickly, which makes repair, not replacement, the first call for minor damage. Our repair service handles re-tensioning and gap sealing on existing screens where the frame itself is still sound.
Screening works best alongside basic breeding-site control around the property. The Victorian Government recommends keeping mesh on rainwater tanks no coarser than 1 to 1.5 millimetres and checking it regularly, according to Health, and the same logic applies to gutters and pot saucers where water collects near the house.
Checklist of questions and specifications to request when getting a quote
A consultation is the right moment to lock in mosquito exclusion alongside security performance, before the mesh is cut and the frame is fitted. Bring these points to the table:
- Ask for the aperture in millimetres, not a vague description like “fine mesh”, along with a sample or close-up photo.
- Ask which material is being quoted, stainless steel, aluminium or brass, and why it suits your property’s conditions.
- Ask the installer to confirm compliance with AS 5039.1 and AS 5039.2, and to carry out a proper site frame assessment before quoting final fit.
- Ask whether adaptors or interlocks will be used to seal any gaps identified during that assessment.
- Confirm warranty terms and what maintenance, if any, is covered after installation.
A written quote that answers all five questions gives you a screen that performs as a security product and an insect barrier from day one, instead of hoping both outcomes land by chance.
Eastern Security Doors’ view: balancing security performance with mosquito exclusion
Security and insect exclusion aren’t competing goals, they’re two outcomes from the same specification decision. We provide security doors and screens for residential properties, aiming to address both forced-entry resistance and mosquito-proofing together.
That starts with a detailed, on-site consultation rather than a generic quote, and is supported by a streamlined manufacturing and installation process. The aperture a homeowner needs for mosquito control is rarely at odds with the strength a security screen needs for forced-entry resistance, it just has to be specified properly from the outset.
— MYBMC
Get a security screen that’s also mosquito-proof
A site visit allows for frame measurements, mesh aperture recommendations, and confirmation of relevant compliance before production. Products are manufactured to custom measurements and adaptors may be fitted where needed.
If you’re weighing up materials, our aluminium security doors page covers finish and mesh options, or browse the full security doors range to see what suits your home. Renovators coordinating screening with bigger works might also find Melbourne home extension trends useful for timing the two jobs together.
FAQ
Can I retrofit mosquito-proof mesh onto an existing security screen?
In most cases, yes, if the frame is still square and sound, a finer mesh can be re-tensioned into the existing frame. Where the frame has distorted or the gaps are at the corners rather than the mesh itself, a full reassessment is usually the better fix.
How do I check if my current screen’s aperture is fine enough?
Hold a ruler against the mesh or ask your installer to measure it. Public-health guidance treats 1.0 to 1.5 mm as the usual benchmark, and anything noticeably coarser than that is likely letting mosquitoes through.
Do security locks or hinges affect how well a screen keeps mosquitoes out?
Locks and hinges themselves don’t block insects, but poorly aligned hardware is a common cause of edge gaps at the lock side or hinge side of the door. A properly fitted three-point locking system actually helps by pulling the door flush against the frame.
How often should I check my security screens for mosquito gaps?
A quick visual check every three months catches most issues, with a more thorough inspection of fixings and interlocks every six to twelve months. Repairing a small tear or loose edge as soon as you spot it is far simpler than waiting for a full gap to open up.
Are security screens better than traditional flyscreens for keeping mosquitoes out?
A well-specified security screen can match a traditional flyscreen’s insect exclusion while adding forced-entry resistance that a standard flyscreen doesn’t offer. The trade-off is that security mesh needs the aperture and fit specified correctly at the outset, since not every security weave is automatically fine enough on its own.
Sources
- Housing for Health — Insects, mosquitoes and flies
- Ballina Shire Council — Mosquito management background information
- Keeping your rainwater tank safe from mosquitos — Victorian Government
- AS 5039.1:2023 preview | Standards Australia Store