Telling a roof rat from a mouse before anyone arrives
The evidence is easy to read once you know what separates the three animals people actually find here. Roof rats leave droppings around half an inch long with tapered ends, usually scattered along attic beams or on top of stored boxes. The noise they make travels: you hear it move from one side of a room to the other, because the animal is running along framing. They are also the species most often responsible when a homeowner reports fruit taken from a tree with the skin left hanging. House mice leave much smaller droppings, closer to a grain of rice, and they concentrate them in a tight line because a mouse keeps a small territory and uses the same runway nightly. The sound is lighter and stays in one area, often behind a kitchen cabinet or in a single wall. Norway rats announce themselves outdoors rather than overhead. You find burrow openings along a foundation, under a shed, or beside a slab, often with a smooth beaten path leading away. Knowing which of the three you have tells the inspector whether the job happens at the roofline or at ground level in Austin, and that changes the whole plan.
How sealing an attic actually gets done
Exclusion is a construction task, not a spray. The crew works the perimeter of the roof and the base of the walls, and every opening gets a material chosen to survive chewing. Vents get quarter-inch hardware cloth fastened from behind or over the frame, never window screen, which a rat opens in a night. Soffit and fascia gaps get metal flashing bent to fit, since the gap between a fascia board and the roof deck is one of the most common ways into a Texas attic. Cracked plumbing vent boots are replaced outright. Where cable, gas and refrigerant lines pass through a wall, the hole is packed with copper mesh or steel wool and then sealed so the mesh stays put. At grade the work is the same idea with different details: door sweeps, weep hole covers, and metal at any place a slab meets siding. The whole job takes one to three days depending on how much roof edge is involved, and it is the part of the process that determines whether you deal with this again next year or not.
Season by season in a place that never freezes hard
Late winter and early spring, February into April, is the best stretch to book sealing. The attic is still workable, populations outside have not peaked, and any opening you close now is a door that is not available when numbers rise. Summer is misleading. With afternoons near 97F, attics become punishing, and rodents move toward soffits, wall voids, garages and shaded crawl areas where it is cooler. Households often assume the animals left. They did not; they simply stopped using the hottest part of the building. Autumn is the decisive part of the calendar. Outdoor numbers are at their maximum after a full breeding season, nights cool down, and animals begin testing every eave and vent along the block. Most infestations discovered in winter began in this window. Winter is when the noise gets loud enough to act on. Trapping works fine in cold months, and exterior sealing is comfortable at these temperatures, so there is no reason to wait for spring. What does not work is trapping alone, because mild winters keep replacements arriving from outdoors all season.
When rodent activity turns into an emergency
Most rodent problems are urgent in the way a slow leak is urgent: not tonight, but do not let it run for months. A few situations move up the list. Any sign of chewing near electrical wiring belongs at the top. You will not see it directly, but flickering lights, a tripping breaker, or a burning smell with no source deserves an electrician as well as a pest company. rodents gnaw constantly and wire jacketing is soft material in an attic full of it. Droppings in a food prep area, whether a home kitchen or a small restaurant, are the second. That is a contamination issue with a clock on it, and the CDC lists salmonellosis among the illnesses rodents spread directly. a rodent inside a room with an infant, an elderly person or someone immunocompromised is the third, mainly because handling and cleanup risk goes up. And a rat that has entered through a floor drain or broken sewer line needs a plumber, since no amount of trapping fixes an open pipe. Outside those cases, taking a week to compare proposals in Austin costs you very little.
Reading two proposals side by side
Two companies can quote the same house and land a long way apart, and the totals alone tell you almost nothing. Line the documents up and compare four things. First, the openings. One proposal may list eleven specific entry points with a location and a material for each, and the other may say exclusion as a single line. The detailed one is the only one you can hold anybody to. Second, the trapping. Ask how many visits are included and what happens if catches are still coming at the end of them. Open-ended trapping billed per visit is where a modest quote becomes an expensive year. Third, the cleanup. Insulation removal and replacement is a real cost and a real benefit, but it is optional in light cases, so know whether it is in the number you are looking at. Fourth, the warranty. Ask what it covers, how long it lasts, and whether it survives a roof replacement or new landscaping. Once those four are matched between the two bids, the price comparison finally means something.