Below-Grade Concrete in Portland: Basement Waterproofing, Floors & Repair
A basement only functions when moisture stays out. Portland Concrete seals walls, repairs cracks, installs new floors and builds walkout exits so your below-grade space remains dry and usable. Whether you need a fresh slab, seasonal leak fixes, or a full renovation, we start with waterproofing and finish with a flat, sound floor. Free written estimate included.
Groundwater Pressure: Why Basement Waterproofing Comes First
Below-grade spaces face constant hydrostatic pressure from the water table. A finished basement, a usable floor, dry storage, all depend on stopping groundwater before it reaches the interior. Basement waterproofing and crack sealing address the source, not the symptom.
Once the walls and floor are sealed, the slab can be installed or resurfaced properly. A basement floor poured over a prepared sub-base with a vapour barrier creates a stable platform for finished flooring, shelving, or living space.
The entire assembly ties back to the foundation structure. Basement renovation work and walkout basement construction both require this moisture-first approach to succeed long-term.
Recent work
Our approach
The Basement Concrete Process in Portland
Assess moisture and damage
We inspect walls, floors and drainage patterns to identify where water enters, which cracks are active, and what waterproofing strategy will work.
Seal and waterproof
Cracks are injected or sealed, membranes are applied where needed, and drainage is restored so groundwater moves away from the foundation.
Prepare and pour
The sub-base is compacted, a vapour barrier is laid, and the basement floor is poured or resurfaced to the correct slope and flatness.
Cure and transition
The slab cures, we review the finished surface with you, and you receive care instructions and timing for finished flooring installation.
Expanding below grade
Renovation Slabs and Walkout Basement Concrete
Once moisture is controlled, the basement becomes a canvas for renovation. Basement renovation concrete includes slab repair, levelling, and detail work that must be precise before framing, drywall, and finished flooring are installed.
A walkout basement is a larger undertaking: cutting a grade-level opening into the foundation, installing new footings, pouring steps, and establishing drainage so a below-grade room gains natural light and direct yard access. Both projects rest on a dry, properly prepared basement floor that was waterproofed from the start.
Waterproofing, floors, cracks and walkout work for basement concrete in Portland.
Yes. Basement waterproofing and drainage come before any finished surface, because water under or behind a slab will find every shortcut. We deal with where water gets in first, then pour the floor.
Usually. A basement floor can often be resurfaced or re-poured flat over a prepared sub-base, with crack repair first where cracks are active. We confirm the cause before recommending a fix.
A walkout basement means cutting a grade-level exit into the foundation, with new footings, steps, drainage and slab detail to match, so a below-grade level gains daylight and direct yard access.
Spring melt raises the water table and pushes against the foundation. Seasonal leaks usually mean cracks plus a drainage problem, both addressed together with crack repair and waterproofing so the fix holds.
Yes. Basement renovation concrete covers the slab repair, levelling, vapour barrier and detail work that has to be right before framing and finished flooring go in.
Homeowner reviews
Portland Homeowners on Their Basement Concrete Work
Leaking walls, uneven floors, renovation planning, or a walkout project, describe what you need below grade and we will schedule a free site visit with a written, itemised quote.
