BASEMENT AND FOUNDATION UNDERPINNING DESIGN

STRENGTHEN AND REPAIR

Basement underpinning (basement lowering) is the process of removing soil below a crawlspace or concrete slab, excavating the area to create a lower support level and then adding new concrete footers, walls and floor to extend the depth or reinforce an unstable foundation.

Underpinning is the reinforcing of an existing building foundation. It is required when the original foundation is no longer strong enough.

 Constructioneers has extensive experience in this field and we ensure that the structural integrity is strengthened, and resting on more supportive soil.

FREQUENTLY ASKED QUESTIONS

There are two methods: Underpinning the foundation walls and benching.

  1. Underpinning the Foundation – the idea is that you first extend the footing of the house to a lower level, after which you can safely dig-out the soil from the inside of the basement, without undermining the foundation walls of the house
  2. Benching – a stable soil slope usually not exceeding 7V:10H is maintained between the subgrade under the lowered basement floor level, and the underside of the original footings (to avoid undermining the footings). Then, a steel reinforced concrete “bench” is poured over top of the stable soil slope and footing, to ensure that the soil slope is protected.

Ask the neighbour’s Contractor provide evidence of insurance which names you and your property as an additional named insured.  

Ask for the Contractors City of Toronto License number, to make sure that he is a licensed contractor.

Contact your house insurance company to let them know that the neighbour is working on the attached house and that some work will be on the shared wall, and that you are being asked to provide permission for this work.  

Ask the neighbour’s structural engineer to copy you on his site inspection reports, so that you can be informed about the progress of underpinning work.

Professional Affiliations
Questions? Contact us today!
Keep
In Touch

CALL US TO START CREATING YOUR DREAM PROJECT AND BRING IT TO LIFE.

Constructioneers
Get A Quote
Thank You. We will contact you as soon as possible.