Pest problems rarely start inside your home. In almost every case, pests get in through small gaps, cracks, or weaknesses around the property exterior. Once indoors, they look for food, warmth, and shelter, which is why stopping them at the entry stage is one of the most effective forms of prevention. But how can you identify pest entry points around your home? And what can you do to prevent entry?

Start with a full exterior inspection

The most effective way to identify entry points is to begin outside. Walk around your home slowly, looking closely at walls, windows, doors, and pipework. Even small gaps can allow pests in. Mice, for example, can squeeze through openings as small as 6mm, and insects need even less space.

Pay attention to:

• Cracked brickwork or loose mortar
• Gaps around door frames and window frames
• Holes near drains, vents, or utility cables
• Damaged fascia boards or soffits

If you notice areas where materials have begun to deteriorate, these are likely to be the first places that pests exploit.

Check gaps around doors and windows

Doors and windows are common entry points because they naturally involve gaps and moving parts. Over time, seals and frames wear down, creating small spaces that pests can use.

Look out for:

• Torn or missing weatherstrips
• Visible gaps at the bottom of exterior doors
• Windows that do not close tightly
• Cracks in the frame or surrounding masonry

You may also notice draughts, which indicate that air, and possibly pests, can pass through. As a result, replacing seals and repairing worn frames is an easy way to block many opportunistic invaders, from ants to rodents.

Examine the roof and loft areas

Your roof is one of the most vulnerable parts of your home because it is exposed to the weather and often difficult to inspect. This means that birds, squirrels, wasps, and rats can all take advantage of damaged roof features.

When checking the roof, look for:

• Missing or broken tiles
• Gaps in the eaves or soffits
• Holes around roof vents or chimneys
• Signs of nesting material near the guttering

If you can safely access your loft, inspect it in daylight. Look for visible light coming through gaps, as this usually indicates a hole that needs attention. You may also spot droppings, shredded insulation, or gnaw marks, all of which suggest pests have already found a way in.

Inspect pipework, drains, and utility lines

Any point where a pipe, cable, or wire enters your home can create a small gap. These areas often go unnoticed because they are behind appliances or hidden from view, yet they are some of the most common pest access routes.

You should check:

• The area behind washing machines, dishwashers, and sinks
• Around boiler flues or ventilation ducts
• The base of external taps
• Gaps around electrical meter boxes and cable entry holes

Rats in particular are known to use drainage systems and sometimes enter homes through damaged pipework, so it is important to check both the inside and outside of these areas.

Inspect interior rooms for indicators

Once you have completed your exterior inspection, check inside your home for signs that pests are already active. Even if you cannot see the entry point directly, these clues help you narrow down the location.

Look for:

• Droppings along skirting boards
• Grease marks or fur, especially along narrow gaps
• Gnaw marks on wood, plastic, or cables
• Unusual smells or scratching sounds

Pay particular attention to kitchens, utility rooms, boiler cupboards, and loft spaces, as these provide warmth, shelter, and access to water.

When to call a professional

While you can identify many entry points yourself, some gaps are difficult to access or may require specialist equipment to detect. If you suspect pests are entering through the roof, cavity walls, drains, or electrical routes, it is safest to contact a professional pest control technician.

A trained expert can:

• Locate hidden entry points
• Identify which pests are involved
• Provide safe and effective treatment
• Recommend long-term prevention measures

For professional pest control, you can count on us here at Wipeout UK. We are the number one choice for pest control in Preston and we offer a wide range of services. Why not get in touch to find out more?