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I have tried various surfactants on my greenhouse walls to reduce condensation fogging and none of them worked. Thanks for the reply, if i knew about this i would probably make it with slight slope. I may fix this next season since i am thinking of raising the structurevwith the policarbonate, the plants grew up to the ceiling in their first year, that speaks volumes dor the future....In any case, even of they did I don't know if it would help your problem. I don't hve any good ideas for you, unfortunately. This dripping can be minimized by the design of your greenhouse (sloping roof and channels for the water to flow down)
I have had the same problem happen to me. I want to eliminate the problem as water constantly dripping from the ceiling of the gh will cause problems on some types of plants. Opening the vents should help eliminate the problem during the day, but the cold will get in.
de-humidifiers are very expensive to run, you'd be better off just heating the greenhouse to reduce relative humidity
I don't think you can stop the condensation in an economical way. But how about figuring out a way to intercept the water droplets and funnel them off away from the plants. The water will condense on the cold outer skin but not on a layer of poly hung below that to intercept the water and run it where you want.
That bothered me at first also, but now I just let it rain in there.It has never hurt anything, and if a drip happens in a predictable spot, i just move a "thirsty" plant under it.Carolyn
The way to prevent diseases is with air flow. I have several small, cheap fans mounted way up high. In the cooler months, they point down to drive warm air closer to the plants. In hotter months they point straight ahead toward the exhaust fan. They are higher than I can reach, but I just use a stick to rotate them. My birds think its fun to ride the fans when I move them around...Carolyn