Overspray

Among the documents behind this entry, the word is printed in a paver one. ICPI's Tech Spec 5 says low tree branches, shrubs and vegetation adjacent to the pavement should be "tied back or covered to protect from overspray of cleaning solutions or sealers," so the term is printed about pavement, not a roof.

The roof bulletins make the same point in other words. ARMA's shingle bulletin says the solution "should be gently dispersed on the roofing surface" and applied with care for the rest of the building and the landscape around it, and ARMA's Algae & Moss page calls for proper precautions to protect landscaping and surrounding areas from the chlorine bleach solution.

On a Naples roof job, two things sit close enough for carried solution to matter: the windows below the eaves and the plants along the roofline. What happens on the ground while the work is done, from the plants to the sprinklers, is laid out in how soft washing works around the roof.

The National Glass Association's Glass Technical Paper FB01-00 says the plastic interlayer in laminated glass is generally exposed around the edge of the pane and that "cleaning fluids and their vapors must be kept away" from it, and its examples of materials that may cause harm include "Bleach (or other solutions containing sodium hypochlorite)."

Impact windows are built with laminated glass: PGT says its own hurricane windows and doors are made with it, and Cardinal describes its Sea-Storm product as "impact-rated laminated glass." Put those lines beside NGA's, and overspray control is a technical requirement wherever roof solution can reach that glass. How a roof wash and the windows under it interact is answered on whether roof cleaning dirties the windows, and what a cleaner has to establish about a pane first is on how exterior window cleaning works.

Laminated impact glass is one of the four kinds sorted on the window cleaning page's glass types, each with its own care.

ARMA's shingle bulletin keeps the plants and the person applying the solution in one short passage: apply it carefully to avoid harming the landscape, and "Use normal precautions for handling bleach, including eye protection and rubber gloves."

What bleach can do to a person is printed on one household bleach maker's safety data sheet. Clorox's 2021 sheet for its Disinfecting Bleach carries the signal word Danger and the hazard statement "Causes skin irritation. Causes serious eye damage." That sheet describes a retail product, not any solution mixed for a roof.

Whether overspray harms a given planting is its own question: whether roof cleaning hurts plants takes it up. Where people and pets belong while the roofline is worked is answered on staying home during roof cleaning and keeping pets inside during roof cleaning.