Rodents garage door seal entry hole — garage door seal

Use only checks that match the exact appliance or system and its official guide.

1. Photograph and measure the visible seal gap without touching it

   From outside the garage-door path, photograph the bottom seal, side seals, threshold, corners, and jamb. Place a ruler or other clean object beside the gap only if it can be done without touching droppings, nesting material, or the door hardware.

   Expected result: Record whether the gap is at the bottom, side, corner, or damaged seal; whether daylight is visible; and whether the door is closed evenly or has a bent section.

   Next step: Keep the photograph and measurements for the exclusion technician. Do not remove or install a seal until current animal activity and the full route have been assessed.

   Stop if: Stop if the door is unstable, the seal is attached to damaged hardware, the gap opens into a cavity, or touching the area would contact animal material.

   Why this matters

   Why: A gap at the door boundary can provide entry, but the location and door condition determine whether a compatible sweep, seal, or structural repair is appropriate. CDC says garages and outbuildings should also be sealed, while EPA notes rodents can use holes inside and outside the home.

2. Look for signs of current or past activity

   From a safe distance, inspect the floor near the seal, corners, stored items, and the exterior foundation for droppings, urine staining, gnaw marks, shredded paper or fabric, tracks, nesting, or a stale odor. Use a flashlight from outside the suspected route; do not sweep, vacuum, spray, or pick up anything.

   Expected result: Record no signs, old-looking signs, fresh droppings or gnawing, nesting material, an animal sighting, or odor coming from a hidden space.

   Next step: Photograph signs from a distance and request professional inspection when signs are fresh, repeated, or inside an inaccessible space.

   Stop if: Stop and keep the area closed if you see an animal, nest, carcass, heavy droppings, or material that could be contaminated.

   Why this matters

   Why: EPA identifies droppings, nesting material, gnawing, chewed openings, and stale hidden smells as clues. Fresh signs near the garage seal make an active route more likely, but visual clues cannot establish species or whether animals remain inside.

3. Trace the likely route on both sides of the boundary

   Visually follow the seal line to the jambs, corners, foundation, nearby vents, utility penetrations, and any visible gap under or beside the garage. Check the inside and outside surfaces only where they are open and safely reachable; do not enter a crawlspace, attic, wall, or tight void.

   Expected result: Note whether the garage seal gap connects to a foundation gap, damaged jamb, utility opening, vent, stored clutter, or a route that disappears into a wall or floor.

   Next step: Give the technician a simple sketch or photographs showing every visible opening and where the route becomes inaccessible.

   Stop if: Do not remove paneling, insulation, trim, stored items covering an active route, or any wall or floor material to follow it.

   Why this matters

   Why: CDC recommends checking around doors, foundations, vents, and utility openings because rodents can use small gaps. A garage-door repair alone may not stop entry if another opening connects to the same route.

4. Record attractants near the garage

   Observe, without handling suspected contamination, whether pet food, bird seed, garbage, standing water, cardboard, woodpiles, brush, or clutter is near the garage or seal. Note any recent move of storage or landscaping that could have changed shelter or food access.

   Expected result: Record no obvious attractant, accessible food or water, sheltered clutter, or an attractant directly beside the entry gap.

   Next step: Secure food and garbage in closed containers and report outdoor shelter or water conditions to the exclusion provider. Do not disturb a nest or contaminated item to clean it.

   Stop if: Stop if cleanup would require handling droppings, urine, nesting material, dead animals, or material inside an inaccessible area.

   Why this matters

   Why: EPA and CDC both recommend removing food, water, and shelter sources as part of rodent prevention. Removing an attractant may reduce activity but does not prove the gap is no longer usable.

5. Prepare a safe exclusion handoff

   Compile the gap photographs, approximate opening location, signs and dates, animal sightings, route sketch, attractant notes, door condition, and any symptoms or property damage. State whether the gap is still open and whether animals may be inside.

   Expected result: Your record should identify a visible seal defect, current or uncertain rodent activity, a route into an inaccessible space, or no repeatable signs yet.

   Next step: Request rodent-exclusion service for active or repeated signs, an inaccessible route, a damaged seal that cannot be safely replaced, or uncertainty about animals inside. Arrange garage-door service separately if the door itself is unstable.

   Stop if: Do not trap, poison, seal an active opening, remove the seal, open a wall, or clean rodent waste as part of this guide.

   Why this matters

   Why: A pest professional can select exclusion materials and sequence work safely when they know whether active animals, contaminated material, or a damaged garage door is involved. EPA guidance says not to begin work in infested zones until infested materials are properly addressed.