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One safe and effective means to clean a roof is an electric agricultural sprayer system, as originally developed in Florida, USA in the early 1990s. [6] The equipment is used to apply a cleaning solution (typically containing bleach) that kills the algae, bacteria, mold, mildew, moss, fungus and other organic organisms growing on the roof.
Inhalation of bleach fumes can cause mild irritation of the upper airways. [38] Personal protective equipment should always be used when using bleach. Bleach should never be mixed with vinegar or other acids, as this will create highly toxic chlorine gas, which can cause severe burns internally and externally.
The use of a blowlamp to kill dry rot by applying heat to the surface of affected areas was popular at one time. Obviously, this led to the risk of fire. Experiments showed that a surface temperature of about 100 °C (212 °F) would have to be maintained for up to five hours in order to produce a temperature that would be lethal to fungus ...
Sodium hypochlorite solutions, such as liquid bleach, will release toxic chlorine gas when mixed with an acid, such as hydrochloric acid or vinegar. A 2008 study indicated that sodium hypochlorite and organic chemicals (e.g., surfactants, fragrances) contained in several household cleaning products can react to generate chlorinated organic ...
Algaecides for clearing of algae, moss, lichens from paths, roof tiles, swimming pools, masonry, etc. Benzalkonium chloride is also used in many non-consumer processes and products, including as an active ingredient in surgical disinfection. A comprehensive list of uses includes industrial applications. [10]
The device is simple: a transparent two-liter bottle is filled with water plus a little bleach to inhibit algal growth and fitted into a hole in a roof. The device functions like a deck prism : during daytime the water inside the bottle refracts sunlight, delivering about as much light as a 40–60 watt incandescent bulb to the interior.