-- make use of the greatest dilution that is possible with concentrates. Stronger isn't always better. Often all that the stronger solution adds is damage to the masonry.
-- Protect nearby items that are non-masonry polyethylene sheeting secured by masking tape.
-- Don't clean in high wind.
-- Shut down and cover air-handling equipment that could flow fumes into or through the building. Inform building management and occupants about the cleaning operations.
--When high-pressure water-rinsing is necesary, pre-rinse at low pressure very first to remove most of the residue.
--Use pH monitoring paper or a calibrated meter to always check pH quantities of rinse water and masonry surfaces. Find out of the town's needs for handling the waste water generated by rinsing. The town's public works department is just a good place to start. Ask about the city's industrial pretreatment system. The test panel phase is the right time and energy to make these telephone calls.
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9. Thou shalt perhaps not clean in winter without special precautions.
It's best to clean when masonry and air area temperatures are 40°F or above. Its most useful NOT to clean when temperatures are below freezing or is going to be instantly. Many cleansing substances depend on chemical responses to work. Cold slows the reaction. You might make an effort to make up by overapplying, and inadvertently damage the masonry. When it is 32°F or below, rinse water can freeze in saturated masonry, causing more damage. But, throughout the cold months, if both air and masonry surface temperatures go above 40° (check the masonry with a thermometer), go ahead, with one of these precautions: use water that is hot180°) for prewetting and rinsing. Raising the efficiency is improved by the surface temperature of the cleaner. Extend dwell time by 10 -20 percent, but don't let the cleaner dry inside. Give consideration to scaffolding covered with polyethylene. Space heaters inside may warm the surface enough for effective cleaning. Workers utilized this method during the 1987 - 88 cold temperatures restoration cleansing for the United States Capitol. A caution that is final the test panels you did in summer defintely won't be accurate for winter. Test in cold temperatures in the event that you clean in cold weather.
10. Thou shalt not get it alone.
Never ever you will need to imagine the right path through problems or questions. Your distributor, sales rep or manufacturer's customer care are always thrilled to assist. The answer that is right often only a telephone call away.