A technician in a blue shirt and tool belt kneels on a shingled roof, fastening a long black metal mesh guard along the roofline, with a caulk gun, cordless drills, a tub of screws and a ladder nearby.
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A technician in a blue shirt and tool belt kneels on a shingled roof, fastening a long black metal mesh guard along the roofline, with a caulk gun, cordless drills, a tub of screws and a ladder nearby.

This Anna home had gaps along the roofline where rodents could reach the attic. A mouse needs a gap no wider than a pencil and a rat one about the size of a quarter, so even small openings at the roof edge matter. Our tech sealed the roofline by screwing down metal mesh guards and sealing the edges to block the way in.