Renovation & Interiors

Basement Bathroom Construction with Below-Grade Plumbing & Schluter Waterproof System

Toronto

Completed October 2025

This project involved the full construction of a new basement bathroom in an unfinished lower-level space, built entirely from the foundation up. Because the basement did not previously have plumbing rough-ins for a bathroom, the concrete slab was carefully opened to allow for new drainage and supply lines to be installed. Waste lines and water supply connections were properly routed and aligned before the slab was restored. Structural & Mechanical Work Included: • Concrete breaking and trenching • Installation of new drain and water supply lines • Re-pouring and leveling of concrete base • Full bathroom framing from scratch • Exterior wall framing and spray foam insulation for thermal efficiency Spray foam insulation was applied along exterior foundation walls to improve energy performance and moisture control.

Scope

Concrete slab opening, new plumbing installation, full framing, spray foam insulation, Schluter waterproofing system, RedGard membrane application, shower kit installation, recessed niche construction, tile installation, and complete bathroom fixture installation.

Challenge

Installing new plumbing in a basement required concrete slab demolition and precise drain alignment. Coordinating waterproof drywall, RedGard membrane, and Schluter system integration demanded careful sequencing to ensure full moisture protection and long-term structural durability.

Result

A fully constructed basement bathroom featuring below-grade plumbing installation, professional waterproofing systems, integrated shower niche, and complete tile finish — delivering durability, comfort, and modern design.

Project Area

42 sq ft

Duration

9 days

Materials

Waterproof drywall, Fully tiled shower enclosure, Schluter® tile underlayment and waterproof membrane system, RedGard liquid waterproof membrane, Shower Kit, Tile

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