Originally Posted by Durdy
My GH is 10' x 20'
going to purchase a 20' x 30' tarp and pull it over at night and remove in the morning.
Mine is also to block out neighboring light sources, not light dep
Might set up a mini light dep though to get an early harvest!
Anyone ever seen an automated black out cover that went up and over a greenhouse? Not just pulled across a flat roof?
Never a 'black out', but I vaguely remember one back home 'commercial GH', that had shade cloth in strips. Bottom/side was on spring loaded rollers. Top had a rod in a gusset, pulled up and across by a winch. Best I've seen, to remember anyway.
It'd be a major re-build to get to 'black out', I'm afraid. You'd need to run an 'interior' set of hoops... with everything atrung/attached to or below them, to get a clear pull, so the 'cover' could slide over the interior set in one pull... or maybe two (one from each side up to the middle?)...
Might be easier to do an exterior set and pull it over the whole thing?... with the 'take up' edge being attached to a roller, to pull it 'off'. Moveable edge would need to be one rod with 3 or 4 pulling cables, probably running in a 'channel' to keep from chewing up the clear skin. The pull cables would attach to a 'take up' rod, so you could pull all of them evenly. Probably need either 2 operators, or an adjustable brake on the cable side, so when you go to remove it there is still resistance After it crosses the high point..