Underpinning and waterproofing are big, dirty jobs. They’re not fancy, but they’re necessary. At Maple Leaf Construction, our team of professionals knows how to take on these projects efficiently, safely, and with as little mess as possible. We pride ourselves on giving your project the attention and care it deserves, and treat your home with the same respect that we would treat our own. Underpinning refers to increasing the height of your basement. We do this by excavating beneath the foundation and pouring new concrete.