Commercial Concrete Patios and Landings Whitby

Step 1, survey the connected entrance. Harrowgate records doors, thresholds, stairs, ramps, walls, drains, pavement, landscape grades, rail lines, and the route occupants must retain during work.

Step 2, prepare support and interfaces. Existing concrete is removed within controlled limits, unsuitable base is corrected, and drainage, waterproofing, insulation, dowels, sleeves, embeds, and isolation joints are installed.

Step 3, form geometry and finishes. Forms establish landing elevation, drainage, edges, steps, recesses, and transitions. Reinforcement, rails, door equipment, tactile details, and architectural patterns are checked before concrete.

Step 4, place and finish without losing slope. Concrete is consolidated at edges and embeds, struck from survey control, and finished at the correct set. Texture remains consistent while water is directed away from doors.

Step 5, cure and restore access. Curing and protection continue through the specified period. Rails, joints, sealants, adjacent paving, and landscaping are completed, and the connected route is checked before reopening.

Harrowgate constructs exterior slabs from stable support through finished surface. We set geometry from survey control, isolate the slab from unintended restraint, place exterior concrete without adding surface water, create deliberate joints, and cure the work before opening it to traffic or deicing exposure.

Layout and demolition. Finished elevations, slopes, step geometry, door clearances, and tie-ins are marked before removal. Existing concrete is sawcut at clean boundaries and removed without damaging foundations, membranes, or utilities. Excavation exposes the full base area, including thickened edges, footings, and drainage features shown on the drawings.

Subgrade and granular base. The exposed soil is proofed, soft areas are undercut, and granular material is placed in compacted lifts. Base elevation is trimmed accurately so concrete thickness is not lost at high spots. Positive drainage is built into the support, and capillary or frost-susceptible material is removed where the geotechnical design requires it.

Forms, reinforcement, and embeds. Forms establish straight edges, slopes, risers, nosings, curbs, and isolation joints. Reinforcing steel or welded wire reinforcement is chaired to the specified cover instead of lying on the base. Dowels, sleeves, railing inserts, canopy anchors, and electrical conduits are fixed before concrete. Embedded items receive coordinated corrosion and water details.

Placement and consolidation. Concrete is delivered to the approved CSA A23.1 exposure and slump, then placed continuously within planned panels. Pump or chute access avoids segregation. Crews consolidate around steel, corners, embeds, and thickened edges without over-vibration. Screeding follows grade rails, and the surface is checked for drainage before finishing closes it.

Exterior finish and joints. Broom texture is oriented for traction and runoff, while architectural finishes follow approved samples. Edges and nosings are tooled without trapping water. Construction, isolation, and contraction joints are installed at the designed locations. Sawcuts begin within the concrete's proper timing window and reach the specified depth without crossing embedded services.

Curing and protection. Concrete is cured under the approved method and protected from rapid drying, rain, freezing, overheating, and early loads. Barricades prevent footprints and edge damage. Sealants, penetrating treatments, rails, and furnishings are installed only after the concrete reaches the required condition, and deicing exposure is controlled during early service.

Final review checks elevations, drainage, surface texture, joint locations, edges, steps, threshold transitions, inserts, and adjacent restoration. Harrowgate removes form projections, patches approved tie locations, cleans slurry, and restores landscape or pavement limits. Concrete batch and field quality records are retained with the project package where testing is specified.