The closed up Arvada home is a winter and vacancy pattern: a house shut through a freeze with the water on, a pipe that split in January and fed a basement until March, an estate or a relocation discovered by a smell. Prevention is correspondingly mechanical: water shut off at the main for long absences, a low temperature alarm that reaches a human, and a neighbor or watch service walking the basement monthly. Where a closed home has grown, the inspection precedes any cleaning, because the water event, not the colony, sets the scope.
The prevention is boring and effective: keep the AC running with humidity control as the goal (a humidistat or a smart thermostat holding indoor humidity under about 60 percent), keep interior doors and closet doors open for airflow, and have a human being walk the home on a schedule with instructions to run water, check the handler pan, and look under sinks.
The vacancy rule for the Front Range is mechanical: water off at the main for long absences, heat held above freeze with an alarm that reaches a human, and a monthly basement walk by someone with a flashlight and the household's number. Arvada's closed home disasters are freeze disasters first and mold discoveries second, and every item on that short list is aimed at the first of those.
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