Hello Tim,
I have purchased a new spa that requires an 8'x8' level area. I was planning on putting it on my patio which is 3" concrete with gravel aggregate. It turns out, however, that there is too much slope on the patio for drainage - several inches over an 8' span. I don't want to jack-hammer out the patio and build a concrete foundation due to the time and expense involved.
Instead, a friend suggesting building an 8'x8' frame out of 4"x6" pressure treated lumber and filling this with (tamped) pea gravel. I can then level out the gravel inside the frame. I would secure the frame against the concrete of the patio with concrete fasteners. Can you tell me what you think of this idea?
Regards,
Fred
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Fred,
With all due respect, I think the idea is a bad one. I would want my spa supported by solid masonry, not pea gravel that can shift if something goes wrong with the timbers.
Why not just do a quick Concrete Overlay on the patio just in the area where the spa will sit? The overlay would be installed level so the spa in turn would be perfectly level and secure.
Tim Carter
www.askthebuilder.com
W3ATB