22/09/2026
Rat problems can develop at any time, and it does not take long for rodents to identify weaknesses in a property and exploit them.
One particularly common issue is a damaged or defective airbrick at low level. Airbricks are a frequent point of entry for rats and other rodents because damage, deterioration, or missing sections can create an opening large enough for them to gain access to the buildingβs cavities.
Once inside, rodents can move through wall cavities, floor voids, and other concealed areas before reaching the loft space. This can result in occupants hearing scratching, gnawing, and movement within the walls and ceilings, with noises often becoming particularly noticeable around the loft area.
A seemingly minor defect, such as a damaged airbrick, can therefore provide a direct route into the property and allow a much larger pest problem to develop. Regular inspection and prompt repair of damaged airbricks and other low-level defects can help prevent rodents from gaining access in the first place.Other factors can easily go unnoticed, which is why a thorough property survey should not stop at the visible areas of the building. Where rat activity is suspected, a careful inspection of the drainage system is essential.
In this case, the soil stack located behind the kitchen worktops provides an important indication that rats have also been able to exploit a weak point within the drainage system and gain access to the property.
Defects within drains, damaged pipework, defective connections, displaced joints, or other points of failure can provide rodents with a route from the drainage system into the building. Once a weakness is identified, rats can exploit even relatively small openings and move into concealed areas of the property.
Other areas that rats frequently exploit are vegetation, especially large bushes or trees encroaching on or running up the building; rats climb these, and they go unnoticed under the cover of the vegetation. Once they have reached the top near the gutter line, a gap under the tiles will provide easy access for them, and again have broken in to your property.
This is why a thorough survey should consider both the external structure and the drainage system. Identifying the entry point is just as important as dealing with the rats themselves. Without locating and rectifying the underlying defect, further rodent activity can continue despite treatment.