How do mice and rats find a way into a Lancaster house?
Rodents use small gaps: a space at a pipe or cable, a vent without mesh, a gap at the foundation or a door that no longer sits tight. The technician follows the signs to the gap rather than guessing where it is.
A mouse passes through a gap about the width of a pencil. A rat needs more room but can still use the ordinary openings of a house. The gaps that matter are often low on the building: where a pipe enters the foundation, where a vent sits in the wall, or where a door no longer closes flush with the floor.
The outside is walked first. The foundation line, the bottom of the siding and the penetrations are examined, and each gap is measured and marked. The inside walk then follows the droppings and grease marks toward the wall where the animal comes through.
Some entries are hard to see. A gap behind a dryer vent, a crack along the top of a foundation wall or a wire that enters a void can be the only route. Those are the openings a household most often misses, and the reason a sealed-looking house still shows activity.
Why is a seal part of the same visit?
A removal without a seal leaves the route open for the next animal. Sealing is therefore done during the visit, because a house with a removed animal and an open gap will see activity again.
Trapping and baiting deal with the animals that are present. Neither stops another animal using the same gap, and a house that is cleared but not sealed commonly shows new activity within weeks.
A seal has to resist chewing. Small gaps are filled with metal mesh and sealant, larger openings with a metal plate or a fitted cover. The technician chooses the material for the gap and explains the choice, and the household receives a written list of what was closed.
Sealing before the cold is the timing that makes the most sense, since the cold is when animals look for shelter. An entry closed in the autumn is one fewer route in the winter, and the walk makes the list early enough for that.
How is the clean-up done without spreading dust?
Droppings and nests are wetted with a disinfectant, left briefly, then wiped up with disposable towels that are bagged and sealed. Gloves and a mask are worn, and dry droppings are never swept or vacuumed.
Droppings and urine can carry disease, and dry material breaks into a fine dust when it is swept or vacuumed. The method is to wet the material first, wait, then wipe it up and bag it. The technician wears gloves and a mask for the whole job.
Insulation and nesting material that is soiled is removed rather than left in place, because it holds smell and contamination. The technician works from the access the building allows and disturbs no more material than the removal requires.
Children and pets are kept out of the work area, and the household is told when the room is safe to use again. The area is aired after the clean-up, and anyone with a breathing condition is asked to let the technician know beforehand.
