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I wanna join the KP Diamond Redfishing League!

We had to clean a roof for quick sale on a house and we brushed snow off and cleaned in 38 degrees. Never again. 4 coats of 75% strength pool shock (12.5%).

PA Roof Cleaning Pros wrote:

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We had to clean a roof for quick sale on a house and we brushed snow off and cleaned in 38 degrees. Never again. 4 coats of 75% strength pool shock (12.5%).

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Oh I hope you rinsed the heck out of it!

If not that concentrated chlorine will rain down with the sleet, water, etc. and kill everything in the dripline for a week.

 

We have cleaned roofs here in Sunny Florida when the temperature has dropped well below freezing with heavy frost on the ground in January with NO SH booster and were fine. The job was over 80 houses so it was a big project. The ambient temperature seems to have less effect as opposed to the surface you are spraying, as long as the sun was up and starting to shine on the roofs we were ok. These roofs are all tile and had significant frost on them. I would be very very careful with plant care as they seem to be more susceptible to damage in the cold and the real damage not being apparent until the spring growing season. This sentiment about the plant care is directly from some very large companies and horticulture people with experience.

i did one yesterday and it took two coats but the moss and lichen started dying in about 20 minutes after we had sprayed. used the normal mix ratios.