What started out as a simple job to replace the decking on my deck with composite boards has now become a much bigger job, as I discovered after removing the old decking that things were not level. Suspecting something was amiss, I pounded a rod next to the 4x4 uprights, only to discover that there was nothing to stop it from going all the way down, meaning no cement had been poured around the posts. Does anybody know if there is a way to level out the support structure and stabilize it without tearing the whole thing apart and starting over, doing it the proper way? is there any way to maybe raise it up with a jack and somehow injecting concrete underneath?
No Cement Around Support Posts
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Don't strictly need concreting in if they are on a firm surface. Maybe you could dig out below the post and slide a small or part cut paving slab under it. Bits of old slate or roof tile to level it off.
Thermo's method will be more secure if you are on a slope.
Thermo's method will be more secure if you are on a slope.
And as it's all tied together it doesn't really need concrete. I've got structures in my garden built without concrete just rammed sand and bricks around the posts and they haven't moved at all.
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