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As a home owner you might have a lot of question in regard to lowering basement floor and it process underpinning foundation wall to increase basement height. Let’s walk throw this together and get answer for few of them & remember you can always reach to us at 647.774.0761 with more question as we are one of the trusted underpinning contractors in Toronto.

What is Underpinning?

Underpinning is a method used for strengthening and stabilizing the foundation of an existing building, increase basement foundation depth to achieve more living space or repairing faulty foundations. This might be the process if you plan to increase the height of your existing basement or crawl space to achieve more living area at the comfort of your house, add stories to an existing structure or when the foundation has been damaged. The most used method of underpinning is mass pour method. Excavate sections in sequence to a pre-established depth below the footing and place concrete on each pit. Repeat the method until the entire affected area has been underpinned.
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What our client say about us?
Why Khalsa

Why Khalsa Construction?

Khalsa construction is a known name among underpinning contractors in Toronto.  Our tremendous experience in lowering basement floor & basement underpinning jobs give us the advantage over other underpinning contractors.

Why Underpinning?

  • The original foundation is simply not strong or stable enough.
  • The usage of the structure has changed. lowering basement floor toronto.
  • The properties of the soil supporting the foundation may have changed (possibly through subsidence) or were mischaracterized during planning.
  • The construction of nearby structures necessitates the excavation of soil supporting existing foundations. underpinning contractors toronto.
  • It is more economical, due to land price or otherwise, to work on the present structure's foundation than to build a new one. basement underpinning toronto.
  • Increase basement height for more living space or converting crawl space into a full size basement. lowering basement floor contractors toronto. ,

Underpinning Tips ( lowering basement floor toronto )

  • Basement underpinning for lowering basement floor should be conducted by an experienced contractor and supervised by a structure engineer or city inspector in Toronto.
  • Project like underpinning and basement lowering in Toronto require permit by-law to protect home owners from faulty construction protecting their house, family and money.
  • Underpinning contractors in Toronto must carry a valid liability insurance protecting home owners from any unseen dangers during the course of project.
  • The underpinning process must be started from the corners and worked inwards in minimum 3 stages.
  • Underpinning must be done only on load bearing walls.
  • Do not underpin below non-load bearing walls.
  • Start underpinning under a strip of footing. It is recommended to start with at least 3 feet long, two feet wide and two feet depth depending on soil condition.
  • After the excavation has been completed add concrete to the cavity. Concrete should be mixed using one part cement, three parts sand and six parts aggregates or minimum 25mpa.
  • Remember to use on the edges.
  • Allowed concrete placed to set for at least two days.
  • For traditional underpinning leave 2” space to dry pack with non-shrink grout.
  • Use a rod bar ensuring that the cavity under the existing foundation is filled up.
  • Ensure that the concrete is cured thoroughly before loading it.

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