Should pets stay inside during roof cleaning?

The Clorox Company's 2021 safety data sheet for Clorox Disinfecting Bleach prints the line in capitals: "KEEP OUT OF REACH OF CHILDREN AND PETS." ARMA's shingle solution is made from liquid household bleach, and that ingredient is the whole link between this sheet and a roof: the sheet describes the retail product in its bottle, not any solution a cleaning company mixes.

The same sheet goes further than storage. It warns that mixing the product with chemicals such as ammonia or acids, or with organic matter such as urine or feces, in a manner inconsistent with the label may release hazardous gases irritating to eyes, lungs and mucous membranes. The sheet writes that warning for the product itself and names no yard, and no document read for this page says what a diluted roof solution does where an animal has been. It is still the one line in the documents that puts bleach and pet waste in the same sentence.

ARMA's shingle bulletin tells whoever applies its bleach and water solution to apply it carefully to avoid damage to other parts of the building and the surrounding landscape. A second ARMA bulletin repeats the point for algae and moss together: proper precautions to protect landscaping and surrounding areas from the chlorine bleach solution.

ICPI's Tech Spec 5, written for paver cleaning and sealing rather than roofs, adds one more step: turn off all automatic sprinkler systems during cleaning, sealing and drying. ICPI gives no reason in that line; the practical point for a yard with animals is that a running sprinkler spreads water across the ground they walk on. What runoff is, and where it goes, is set out at runoff. Overspray follows the same logic: solution that drifts past the roof edge lands on whatever is under it, animals included.

None of the documents read for this page describe what happens to a gate, a leash or a yard on the day of a job; that is a question to raise at the estimate, the same as whether people stay home. What the sheet and the bulletins do publish is enough to explain the caution: a bleach solution that the bulletins keep off landscaping on purpose is not something to let a pet walk through while it is still on the ground.

Plants get the same kind of protection for a related reason, covered at roof cleaning and plants, and ICPI's step of saturating plants with water before an acidic cleaner runs near them is explained at pre-wetting. Phosphate-free, a word that turns up near cleaning products, is not a word about bleach: in GAF's shingle mixture it names an acceptable stand-in for TSP, as phosphate-free explains. The ground-level steps the documents describe around a roof are set out at what happens around the roof.

If a pet does get into a cleaning product, a veterinarian or the poison control line printed on the product's own label is the right call, not a guess.