12 Common Ways Pests Get Into West Midlands Homes (And How to Block Them)

The cheapest pest treatment is the one you never need. Most rodent and wasp infestations in West Midlands homes come in through five or six predictable entry points — almost all of which can be sealed in a Saturday afternoon with materials from a local merchant.

Here's the walk-around inspection a professional pest controller does on a proofing visit, so you can run it yourself.

Start at the foundations

Walk the full perimeter of the house slowly, ideally with a torch. You're looking for any gap a pencil could fit through (mouse access) or a 2p coin (rat access).

Airbricks with broken or missing mesh — fit stainless steel airbrick covers (£3–£8 each, breathable).
Gaps around incoming pipes (gas, water, waste, telecoms) — fill with stainless wire wool packed in, then sealed over with exterior-grade silicone or mortar.
Cracked or missing mortar — re-point with cement; rats can chew old lime mortar.
Gaps under garage doors and side gates — fit a brush strip or threshold seal.
Wall cavities exposed at ground level — close with cement or expanding foam (foam alone is not rodent-proof; finish with metal mesh).

Check the roofline

The roofline is where wasps, squirrels and roof rats get in — and it's the area most homeowners never inspect.

Lifted or slipped roof tiles — even a single missing tile creates a wide-open loft entry.
Broken soffit and fascia boards, especially on older West Midlands housing stock.
Gaps where the roof meets the gable wall — common on extensions.
Open chimney pots without a cowl — fit a wire mesh cap to keep birds and squirrels out.
Vents in the soffit — replace damaged inserts; mesh-back any open ones.

Doors and windows

These are obvious but routinely overlooked. Stand inside a closed door at night with the lights off — any daylight you can see is a pest entry point.

Worn door brushes / draught excluders — replace; mice fit through 6 mm gaps.
Cat flaps without a magnetic seal — also a primary route for stray cats and foxes.
Window vents and trickle vents — fit insect mesh inserts.
Loose-fitting French doors — fit weather seals to all four edges.
Damaged window putty or frame seals — re-seal.

Drains, vents and utilities

Drains are the single most underestimated rat route in the West Midlands — particularly in older properties where Victorian sewers connect to modern drainage.

Open or broken drain covers — replace.
Disused soil pipes — cap properly; rats climb up internal stacks into toilets.
Tumble dryer vents and extractor outlets — fit a cowl with a non-return flap and mesh.
Boiler flues and gas terminal gaps — get checked by your installer; don't seal yourself.

What to do if you find evidence

If your inspection turns up droppings, smear marks or visible damage at any entry point, sealing it without treatment will trap the existing population inside — usually making the problem worse before it gets better. Treat first, proof second.

Frequently asked questions

Can pest controllers do the proofing work too?

Most do. Many include basic sealing in a treatment package, with larger jobs (re-pointing, soffit repairs) quoted separately. Always ask for an entry-point report after any rodent treatment — it's the difference between a one-off fix and a recurring problem.

Is expanding foam enough to block mice?

No. Mice chew through expanding foam easily. Use it as filler only, then back it with stainless wire wool or metal mesh.