Wire Mesh Air Vent Covers – Rats – Mice – Insects

During the warmer months, common house mice are content to live outdoors, munching on cereal grains and seeds. But at the first sign of a cold snap, they`ll scamper towards the comforts of the nearest human dwelling and find their way in.

Once there, they will nibble at (but not necessarily consume) practically anything they can get their tiny teeth on, including lead, rubber, plastic and even some forms of concrete. This is because they have to gnaw all the time to keep their ever-growing incisors trimmed to the right length.

It is this gnawing, along with a relatively soft skull and an already slender, flexible body that allows the mouse to get through improbably small holes.

The process that will permanently get rid of mice will involve sealing quite small holes in your property and of course, the air brick is a favourite entry place for these tiny creatures.

Any openings in your home that are wider than 6mm (a quarter of an inch) and the trouble starts. Through squeezing and nibbling, the mice could well be moving in.

Remember that a resourceful mouse can also jump 46 centimetres (18 inches) vertically; swim; happily travels upside down and climb up pretty much anything.

There are two main methods of fixing Air Vent Cover airbrick grills:

1) Glue with Avifix or Avisil adhesive

• Use a caulking gun, brush off, or wash away any dirt, moss, or loose brick, and allow it to dry.
• Do not remove the hole covers at the corners of the Mouse Mesh frame
• Apply a continuous bead of adhesive, about 6mm in diameter, around the back edge of the frame.
• Gently push the frame into place, ensuring that the glue is sufficient to bond to the brick around the whole edge

• Make sure that you place the Air Vent Cover the right way up – the text “DO NOT BLOCK THIS VENTILATOR” should be readable at the bottom left of the Air Vent Cover when in place.
• Leave the grill undisturbed whilst the glue cures – 24 hours will usually give a cure depth of about 1.5mm of glue.
• Coverage: One standard cartridge of adhesive should be sufficient for approximately: 12 small Air Vent Covers, 10 medium Air Vent Covers & 8 large Air Vent Covers

2) Screwing the Mouse Mesh into place

• Please note that our ABS range does not come with screws use four brass or stainless steel round head screws approximately gauge 6 by 1.5 inches – but please check the head size as manufacturers’ sizes may vary. Alternatively use No 4 gauge.
• Remove screw caps at the corners of the Air Vent Cover by pushing from the back with a small screwdriver
• Mark through holes onto brickwork drill out holes with a masonry drill
• Push plastic raw plugs into holes flush with the surface of the walls
• Attach Air Vent Cover applying reasonable pressure to screws but avoiding over-tightening which may damage the grill push screw caps back into place.

It blocks rats, mice, cockroaches, wasps, flies, spiders, and other small pests from entering through vent holes.

No. The mesh structure maintains adequate airflow for ventilation systems while keeping pests out.

Yes. It’s weatherproof and suitable for external walls, soffits, garages, and internal vents.

It can be both permanent or temporary depending on how you secure it (screws vs adhesive).

Yes. It’s widely used by pest professionals as part of integrated pest management strategies.

Yes. If removed carefully, the air vent cover can be reused on another location or property.