So what are thoughts on a foundation for this greenhouse? Will be put in a grass lot. Is simply a cement slab along the long sides good enough? Thinking 12" x 60foot. Both sides.
The greenhouse is 28' x 60' total size. Or do I need to go with something like piers on each base leg? Thoughts?
Central Indiana location.
Thank you
by Ruraltarantula
2 Comments
Can we assume the building site is level? If not, there’s some work involved.
I can’t imagine making that many piers. You’d need to hire machinery. What you really need is enough weight to hold it steady in a thunderstorm or derecho. Don’t even bother planning for tornadoes.
If things are level, I think I’d be tempted to just lay down a bunch of treated 6x6s, firmly attached to each other. Then I’d drill a few half inch holes in each one, and pound some rebar through them a couple feet into the ground. On top of those, I’d lay 2x4s, staggered so the 6×6 joints are covered, attach them really well, and connect the pipe brackets to those.
Just from ground moisture, those 6×6’s will stay damp, and hold a tremendous amount of weight. They’ll likely outlive that pipe.
Have you considered liteform? It’s a compromise from having a solid pad vs price. That being said a solid pad is easier to clean (powerwasher). There are pros and cons, especially with thermal retention.