The foundation determines how long your tile lasts. This guide covers everything Toronto homeowners need to know about subfloor preparation.
Why Subfloor Preparation Matters
#Consequences of Poor Preparation
Immediate: Tiles won't lay flat (lippage), uneven surfaces, hollow spots Long-Term: Cracking over time, grout failure, tiles coming loose, complete installation failure
Cost of Failure: Often 2x original project cost for tear-out and reinstallation
Understanding Subfloor Types
#Plywood Subfloor (Most Common in Toronto)
Requirements: Minimum 1-1/8" total thickness, properly fastened, level within 1/4" per 10 feet
#Concrete Slab
Preparation: Moisture testing essential, leveling compound often required, crack isolation for existing cracks
Underlayment Options
#1. Cement Backer Board
When to Use: Over plywood/OSB, bathroom floors, kitchen floors Cost: $1.50-2.50/sq ft installed
#2. Uncoupling Membranes (Schluter DITRA)
Benefits: Prevents crack transfer, allows substrate movement, integrated waterproofing When to Use: Over concrete with cracks, wood subfloors with movement, heated floor installations Cost: $3-6/sq ft installed
#3. Self-Leveling Compound
Purpose: Creates flat surface, essential for large format tiles Cost: $3-8/sq ft depending on depth
Moisture Testing and Protection
Why It Matters: Moisture causes adhesive failure, mold growth, tile damage, efflorescence
Toronto Basement Considerations: Ground moisture wicking, seasonal water table changes, proper vapor barriers essential
Cost of Proper Preparation
Typical Toronto Projects: - 100 sq ft Bathroom: $300-1,000 - 300 sq ft Kitchen: $700-2,500
**Proper prep costs ~15-25% of total project but prevents 100% project failure**
Prime Tiling's Preparation Standards
Every installation includes thorough subfloor inspection, moisture testing, appropriate underlayment selection, professional leveling, and documentation.
Contact Prime Tiling for professional subfloor preparation. Serving Toronto and the entire GTA.
