Basement Lowering, Foundation Underpinning 416-619-5355, 905-448-5909, 1-866-701-8484.


Underpinning Basement Foundation.

In construction, Foundation underpinning is the process of strengthening and stabilizing the foundation of an existing building or other structure, or most commonly done for the purpose of Basement Lowering thereby creating additional height.

Basement Lowering, Foundation Underpinning


Creating Basement space under existing structure also require Under-pinning after excavation.

Basement Foundation Underpinning may be necessary for a variety of reasons:

+ The foundation is too weak or cracked.

+  The usage of the structure has changed.

+  The properties of the soil supporting the foundation may have changed (possibly through subsidence) or were mischaracterized during Construction or pre-construction design.

+ The construction of nearby structures requires the excavation of soil supporting existing foundations.

+  It is more economical, possibly due to land price, to work on the current  structure’s foundation than to build a new one.

Foundation Underpinning is accomplished by extending the foundation in depth or in breadth, so it either rests on a more supportive soil stratum or distributes its load across a greater area.

Use of micro piles and jet grouting (non shrinking grout) are common methods in underpinning. An alternative to underpinning is the strengthening of the soil by the introduction of anon shrinking  grout and/or construction of     retaining wall commonly known as benching. All of these processes are generally expensive and elaborate.

Let a skilled ACCL Waterproofing foundation engineer take on the project for you.

Visit us at Or call us 416-619-5355, 905-448-5909, 1-866-701-8484. Call us for an estimate.