Rodent Proofing in London

Treatment clears the rodents that are in a property now. Proofing is what stops the next ones getting in. We seal the routes mice and rats actually use, with a double-layer method they cannot gnaw through — and in the rooms you live and work in, a finish you would not pick out as a repair.

Where mice and rats actually get in

Rodents do not break into buildings. They use what is already there: the gap where a waste pipe or cable passes through a wall, an air brick with a broken vane, the space under a kitchen unit where the floor was never finished, a lifted roof tile, a door threshold worn down over years, the void behind a boiler or a bath panel. A mouse needs a gap far smaller than most people expect, and a rat will enlarge a small one until it fits.

Which is why proofing is a survey job before it is a sealing job. Filling the hole you can see, while the three you cannot stay open, buys a few weeks. The diagrams below show the routes we check on every property, outside and in.

The double-layer method

Where the repair will not be seen, we seal with cement and galvanised mesh together, in two layers. The principle is the one used in reinforced concrete: the cement fills and closes the gap, and the mesh runs through it like rebar so that the set material cannot be broken apart or gnawed back out. Cement on its own can be chipped away at the edges. Mesh on its own can be worked loose. Together they hold.

This is the method for concealed places — under and behind kitchen units, in floor and ceiling voids, behind appliances and bath panels, in service risers, around pipe entries inside cupboards. It is a permanent building repair rather than a patch, which is the point.

Where the work will be on show

A cement and mesh repair is the right answer structurally and the wrong one in the middle of a hallway wall. Anywhere the work will be visible we use a polymer hybrid sealant instead, in clear or white, chosen to suit what it is going onto. It stays flexible, it holds to brick, render, timber, uPVC and tile, and it reads as a normal sealant line rather than a hole that someone filled in.

Which material goes where is a decision we make with you at the survey, room by room. Nothing gets a cement finish in a place you would rather it did not.

Why proofing pairs with sanitation

The voids we seal are usually the voids the rodents have been living in, and they do not leave them clean. Droppings, urine, grease trails and nesting material build up in exactly the places that are about to be closed off, which is a poor thing to shut inside a wall.

So proofing works best directly after pest sanitation: the void is cleared and disinfected first, then sealed. It is the combination that gets a property genuinely back to normal rather than quiet.

How the work is ordered

A premium service, and what that buys

This is the more expensive way to proof a building and we are straightforward about that. What it buys is a repair that does not need doing again. Expanding foam, wire wool pushed into a hole and ordinary decorator’s filler are all cheaper, and rodents go through all three — often within the same season, which is how a proofing job becomes an annual cost instead of a one-off.

Proofing is priced per property, after the survey. The number of entry points, where they are and what each one is going into all change the job, so we quote once we have seen it. There is nothing to pay upfront.