One of the most common home renovations in the Toronto area is finishing a basement. For many homes, this can be a fairly straightforward process merely involving drywall, some flooring and perhaps adding a bathroom. Other homes, however, will first require basement underpinning to make the space truly livable. Underpinning may also be performed as a remedy and preventative measure for structural issues.
Most often basement lowering is performed through a process called underpinning. Basement Underpinning Contractors Toronto, The procedure is more complicated than simply digging out the existing floor as this could cause walls to buckle and crack, compromising the structure of the home. Instead, it is necessary to dig underneath the foundation and create a new one capable or bearing the additional weight.
Underpinning requires the involvement of an engineer to assess the building to determine how much the basement can be lowered without compromising the integrity of the building. A stamped drawing from a structural engineer must be obtained before any excavation can begin. If any contractor tells you differently, do not trust them with your home!
UNDERPINNING REQUIRES THE INVOLVEMENT OF AN ENGINEER
When our staff underpins a basement, they’ll access the bottom of the original foundation by detaching a little section and replacing it with lots bearing joist. They’ll then begin to make a new base by excavating whitening strips to the recommended depth and by pouring strengthened concrete. Once everything has dried out and stabilized new floors will be installed in the enlarged space.
Furthermore, to adding more mind room to your basement, other known reasons for underpinning can include shoring up a structure that has deteriorated due to land slippage or that was poorly built-in the first place. But whatever reason you have because of this renovation, be certain that you merely own it done with a licensed and insured service provider. Homeowners have respected the experts at M3C since 2006 and you also too can trust us to provide your home the professional treatment and respect it deserves.
Multi-stage underpinning may be used to build deep reinforced cement walls either within a deep one level basement or when constructing multi-level basements. Multi-stage underpins allow shallower individual underpin excavations which can be advantageous from a health and safety point of view, especially in unstable soils. There are several important points to note when undertaking multi-stage underpinning:
- Temporary propping – vertical and horizontal propping must be designed and in place at all times
- There must be reinforcement continuity between the different stages of underpinning
- The vertical load of the building must be supported by each stage of the underpinning – the base of each intermediate stage of underpinning will often need to be thickened in order to avoid increasing the temporary foundation’s bearing pressure. Any intermediate stage base thickening will usually be trimmed off later to leave a flat vertical wall
- The underpins at each stage should be offset horizontally to avoid a continuous bottom to top vertical construction joint.