Joining old and new foundations
Drainage pipes, concrete, footings and foundations. Post your questions and find answers here

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Souljim
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Joined: Thu Apr 08, 2021 8:19 pm

Joining old and new foundations

Post by Souljim » Tue Jul 27, 2021 8:34 pm

Hi all,

I’m taking down an old conservatory and extending it out to create a larger single storey extension. I’ve got some 25mm x 600mm steel bar to tie the new footings into the existing foundations and had a few questions. What size drill bit do I need? Is 26mm okay or do I need it to be slightly bigger (say 28mm) for the epoxy resin. I don’t want to buy an expensive resin gun to use it once either and I know you can buy some epoxy resins in a syringe that pre-mixes it. Any idea on which one’s best? Thanks

stoneyboy
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Joined: Wed Dec 10, 2008 6:44 pm

Re: Joining old and new foundations

Post by stoneyboy » Thu Jul 29, 2021 8:47 pm

Hi souljim
Probably better to go for the 28 to give a good surround of resin. Go for pure epoxy type.
It is unlikely that conservatory foundations will be adequate for a SS extension so you may have to replace them anyway.
Regards S

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