Subterranean Excavation & Basement Conversions
Expand downwards to create luxurious, quiet rooms beneath your home. Our basement excavation and conversion services cover structural underpinning, advanced cavity drain membrane waterproofing (Type C waterproofing systems), custom spatial design, and lightwell installations.
Ideal for premium home cinemas, private gyms, wine cellars, playrooms, or self-contained guest suites. We use state-of-the-art structural support and drainage systems to ensure a completely dry, comfortable, and well-ventilated space.
Underpinning is where a basement project really earns its reputation as one of the more demanding jobs in construction. We’re working section by section beneath live load-bearing walls, digging out and pouring new concrete footings in a sequence that keeps the entire structure supported throughout. It’s slow, deliberate work by necessity, and rushing any stage of it is exactly how problems end up showing years later.
Waterproofing gets the same level of care, since a basement is only as good as its ability to stay dry decade after decade. Cavity drain membrane systems work by managing water rather than trying to block it outright, channelling any moisture that gets through the external walls down to a sump pump rather than fighting a losing battle against hydrostatic pressure. Paired with the right internal drainage and ventilation, it’s what separates a basement that stays comfortable in ten years’ time from one that starts smelling of damp after the first wet winter.
