Proofing an Older Derby Home Against Rodents
Derby's older housing, much of it Victorian terraces or 1930s semis, was built decades before anyone thought about rodent-proofing as a design consideration. Here are the most common gaps we find, and what closing them actually involves.
Original Airbricks
Airbricks were fitted to ventilate underfloor spaces and were rarely designed with rodent access in mind. Older airbricks, especially ones that have corroded or cracked over the decades, can leave gaps well beyond the 6mm a mouse needs, or the slightly larger gap a rat can squeeze through. Fitting a rodent-proof airbrick cover, one that still allows ventilation but blocks entry, is one of the most effective single fixes on an older property.
Gaps Around Pipework
Wherever a pipe passes through an external wall, whether for water, gas or waste, there's often a gap around it that was never properly sealed, or has opened up over time as the property has settled. These gaps are frequently invisible from inside and only found during a proper external survey, but they're one of the most common entry points in Victorian and interwar housing specifically.
Worn or Damaged Brickwork
A century or more of weathering leaves older brickwork with small gaps, crumbling mortar, and settlement cracks that a determined rodent can exploit, particularly around ground level or where an extension meets the original structure. Repointing and filling these gaps closes off routes that are easy to miss from a casual look at the outside of the house.
Loft and Roofline Gaps
Where a roofline meets the wall, soffits and fascias can warp or gap slightly over the years, particularly on original timber rather than modern uPVC. Loft spaces in terraced housing also often connect to neighbouring properties, meaning proofing sometimes needs to consider what's happening next door, not just within one property's own boundary.
Why Proofing Matters as Much as Treatment
Treating an active infestation without addressing how they got in solves the immediate problem but leaves the door open, sometimes literally, for the next one. A proper survey identifies the actual entry points being used on a specific property, not just the generic list above, which is why proofing advice is included as standard alongside treatment rather than sold as a separate add-on.
Need This Handled Properly?
A survey identifies the exact gaps a rodent is using, not just the general area.
Common questions
Can I proof my house myself?
Some fixes, like a rodent-proof airbrick cover, are straightforward DIY jobs. Others, like repointing brickwork or addressing shared loft spaces in a terrace, are better identified by a proper survey first so you know what actually needs doing.
Does proofing come with a rat or mouse treatment?
Yes, proofing advice based on what's found during the visit is included as standard with our rat and mouse control service.