The plans for this Barn Style Greenhouse don’t include any ventilation. Which in Central Texas, where I live, mean that it could easily get over 100 degrees in a flash, wilting all my plants and killing the fish in my aquaponic system. That can’t happen! So I decided to make one wall of the greenhouse a “window”, and give it the ability to flip and be propped open for air movement. My original method, above, was a bit too flimsy. A mild storm flipped it all the way up and ripped it off my tiny supports. So I built a whole new frame and rigged up a good solid support to hang it. Here’s what I did:
I started by adding a 12′ 2×6 (I should have measured twice before I cut! This was just a touch short, make sure yours goes all the way to the end) by drilling 2 1/2″ screws into each of the trusses.
Next I rebuilt my frame. Before I just pieced together some scrap boards, which made it weak. This time I used a solid 2×4 for the top and bottom. Then I measured the distance between the top of the paneling side, and the bottom of the 2×6. I subtracted 7″ or the width of both 2×4’s, then cut five center supports. I attached them with pocket hole screws, then removed the greenhouse panels from my old frame and put them on the new one.
I just used a bunch of old hinges to attach the window to the support, pulling back the greenhouse panel a bit so half would be below it. I want to keep the water away from them.
Lastly, we cut a spare greenhouse panel in half width wise, then removed some of the screws from the panel on the top, fed the new sheet below it, and reattached the screws. Then we folded it over the top of the window, added more screws, and voila! Easy, water resistant ventilation. Eventually I plan to take down the panels on the other wall, and build another window frame so I can get a good cross breeze going in the summertime. It should also help let pollinators in. Or if pests or critters start being pesky, I’ll add some hardware cloth and screening to keep them out. Whatever it takes to get a happy, breezy system!