*
I have a foundation for my new greenhouse that is not level and varies up to about 2 1/2 inches. I need to level it so I can bolt the outer sill to it every 3 feet and the inner sub structure that supports the whole thing every 6 feet. Would it be possible to pour a cap of concrete on top varying in thickness from about 1 inch up to 3 1/2 inches and keep it in place? Or would it be better to use a pressure treated 2x and shim then grout under? Or any other ideas? Thanks in advance.
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Skim-coating with joint compound covers texture, renews old drywall and plaster, and leaves smooth surfaces ready to paint.
Featured Video
Highlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
*
I have a foundation for my new greenhouse that is not level and varies up to about 2 1/2 inches. I need to level it so I can bolt the outer sill to it every 3 feet and the inner sub structure that supports the whole thing every 6 feet. Would it be possible to pour a cap of concrete on top varying in thickness from about 1 inch up to 3 1/2 inches and keep it in place? Or would it be better to use a pressure treated 2x and shim then grout under? Or any other ideas? Thanks in advance.
*
Hi Dixon,
Yes it's quiet simple to add a concrete capping over your existing foundation. Clean the surface and apply a bonding agent prior to pouring. Use a pea stone mix or a sand mix cement if required.
To make a good connection for your bottom plates, pre-drill the existing concrete and install anchor bolts and cast the concrete around them. Drilling them after the pour will risk your capping.
Gabe