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Question DetailsAsked on 5/9/2014

Jack Hammer should not be used too close to foundation

Having cement patio replaced. It is directly outside of family room. French doors open onto it. Concerned removing with jack- hammer so close to cement foundation, jackhammer could damage it. Are their alternatives?

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1 Answer

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Unless it was a monolithic pour (poured as part of the foundation wall) you should have nothing to worry about with a jack hammer in the hands of a skilled worker and it is highly unlikely it was. I have never seen this done in my 40 plus years in the business. There probably is a piece of expansion joint material between the wall and the slab and even if not the joint between the wall and the slab should creat a weak point that will break.


Don

Answered 6 years ago by ContractorDon

0
Votes

As mentioned in other comment, the patio should not be physically connected structurally to the foundation, so it should be easy to remove it without damaging the foundation. An occasional nick with a handheld jackhammer will not hurt a normal concrete foundation worth worrying about - cinder block or concrete building block it will break through very easily, and I would be cautious about allowing a machine-mounted jackhammer close enough to do damage. Simple solution - tell him you want him to lay a scrap heavy timber like a 4x6 or 6x6 or railroad tie or such along the face of the foundation to protect against accidental nicks - that last strip of concrete they can then just drag away from the foundation before they break it up.


I would also require that they protect the french doors with plywood, both against the hammer and against flying pieces of concrete.

Answered 6 years ago by LCD




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