Does anyone think I would have a problem doing a terre cotta roof in 45-50 degree weather? It is supposed to get a lot colder next week and I assume it will stay that way until spring. Would that matter. I assume I will make the mix a little stronger.
Expect for that roof cleaning to take you at least twice as long and yes you will go through more Chems. Cold tiles take much longer to clean. We have done tile roofs when temps were in the 50's and they take upwards of two times the amount of roof cleaning mix than it normally would if the temps were in the 70's or above.