Bathroom Demolition (Commercial Women’s Washroom) — ISNA High School, Mississauga

Quick snapshot

• Client/site: ISNA High School, Mississauga, ON
• Area: ~1,000 sq ft women’s bathroom/washroom
• Schedule: Night shifts (school operating during the day)
• Timeline: Completed over one week, with 4 active nights
• • 3 nights: bathroom demolition + haul-out
  • 1 night: concrete cutting for plumbing trenches/chases
  • Daytime (low-noise): GPR scanning before any cutting
• Goal: Full bathroom demolition with selective fixture salvage, then safe prep for new plumbing lines.

Why this bathroom demolition needed a tighter plan

This project had two major constraints:

1. No disruption to classes — demolition had to be done at night.
2. Selective salvage — some fixtures and wall-mounted items were in good condition and needed to be removed intact for reuse.

That meant controlled sequencing: salvage first, then heavy removal, then scanning, then cutting.

Scope of work

Phase 1 — Bathroom demolition (3 nights)

We demolished and removed all interior elements required for renovation:

• 10-stall washroom layout: partitions/stall components removed
• Full wall and floor tile removal
• Removal of doors and washroom accessories
• Removal of sinks/components as scoped

Delicate removal for reuse

• Toilets removed carefully for reuse
• Select wall-mounted accessories (including a child change station / similar items) removed without damage

Phase 2 — Block wall removal (layout changes)

A cinder block (CMU) partition separating the sink corridor from the toilet area was removed to support the new layout and plumbing plan.

Phase 3 — GPR scanning + trench layout (daytime)

Before any trench cutting, we performed GPR scanning in the planned trench corridor to reduce risk:

• Approx scan coverage: ~2,000 sq ft
• Planned trench length: ~75 linear ft (≈ 25 m)
• Trench corridor width: ~3–4 ft
  This helped avoid “blind cuts” around existing services and embedded utilities.

Phase 4 — Concrete cutting for new plumbing (1 night)

After scanning and mark-outs:

• Concrete cutting to form trenches/chases for new plumbing lines
• Floor left prepped so the plumbing team could start rough-in immediately

Debris handling & cleanliness

Bathroom demolition creates heavy mixed debris (tile, CMU, partitions). We managed haul-out in controlled runs, kept pathways clear, and finished with cleanup so the space was ready for renovation between shifts.

Result

• Bathroom demolition completed (tile, stalls, partitions, interior elements)
• Reusable fixtures removed intact (toilets + select accessories)
• Floor scanned before cutting to reduce utility-strike risk
• Trenches/chases cut and the area handed off clean, ready for renovation