Slab & Foundation Construction | Concrete Floors Toronto
Premium concrete slab installation for basements, garages, and structural applications – level, durable, and built to last

Professional slab and foundation construction in Toronto. Basement slabs, garage floors, structural slabs. Quality concrete work. Call (437) 545-0067.

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Why Toronto Homeowners Trust DrySpace

25+ Years in Business

12,847 Projects Completed

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Full workplace safety insurance coverage for all workers

CSA Approved

Canadian Standards Association certified materials & methods

ISO 9001:2015

International quality management system certification

BBB A+ Rating

Better Business Bureau accredited with highest rating

Slab & Foundation Construction Services

Expert concrete slab installation for basements, garages, and structural applications. Quality workmanship ensures level, durable, and long-lasting concrete floors.

Types of Slabs We Install

Basement Floor Slabs

Essential for Dry, Usable Space

Components:

Compacted granular base
Vapor barrier membrane
Rigid foam insulation
Reinforcement mesh/rebar
Quality concrete mix

Features:

Proper slope to drains
Smooth, level finish
Control joints
Sealed penetrations
Optional heating tubes

Process:

Excavation/preparation
Gravel base installation
Vapor barrier placement
Insulation (if required)
Steel reinforcement
Concrete pour/finish

Garage Floor Slabs

Built for Vehicle Loads

Specifications:

4-6" thickness minimum
3500+ PSI concrete
Wire mesh or rebar
Proper drainage slope
Durable surface finish

Special features:

Floor drains
Slope to doors
Expansion joints
Non-slip finish
Chemical resistance

Options available:

Heated floors
Epoxy coatings
Integral color
Exposed aggregate
Polished concrete

Structural Slabs

Load-Bearing Applications

Types:

Suspended slabs
Post-tensioned slabs
Composite deck slabs
Waffle slabs
Two-way slabs

Engineering includes:

Load calculations
Reinforcement design
Deflection control
Shear requirements
Fire ratings

Slab-on-Grade

Ground-Supported Slabs

Applications:

House additions
Detached garages
Sheds/workshops
Patios
Industrial floors

Key elements:

Frost protection
Thickened edges
Proper subgrade
Moisture control
Joint placement

Construction Process

1. Site Preparation

Excavation to depth
Subgrade compaction
Verify elevations
Install utilities
Form installation

2. Base Preparation

Granular placement
Compaction testing
Fine grading
Vapor barrier
Insulation placement

3. Reinforcement

Chair/support installation
Rebar placement
Mesh positioning
Tie wire connections
Inspection approval

4. Concrete Placement

Mix design verification
Systematic pouring
Proper consolidation
Level/screed
Float finish

5. Finishing

Bull float
Edge work
Control joints
Surface texture
Curing process

Technical Specifications

Concrete Mix Design

Standard mixes:

Basement: 25 MPa minimum
Garage: 30 MPa minimum
Structural: 35+ MPa
Exterior: Air-entrained
Special: Fiber-reinforced

Admixtures used:

Water reducers
Accelerators
Retarders
Air entrainment
Fiber reinforcement

Reinforcement Options

6x6 W1.4 wire mesh
#3 or #4 rebar grids
Fiber reinforcement
Post-tension cables
Structural steel

Joint Systems

Types and spacing:

Control joints: 10-15’ spacing
Expansion joints: At walls
Construction joints: Pour breaks
Isolation joints: Around columns
Sealant types: Various

Specialized Services

Radiant Floor Heating

In-slab heating systems:

PEX tubing layout
Manifold installation
Insulation requirements
Control systems
Energy efficiency

Benefits:

Even heat distribution
Energy savings
Comfort
Snow melting
No visible equipment

Decorative Concrete

Finish options:

Stamped patterns
Exposed aggregate
Integral color
Acid staining
Polished concrete

Applications:

Basement floors
Garage floors
Patios
Walkways
Commercial spaces

Moisture Control Systems

Preventing problems:

Vapor barriers
Waterproof membranes
Drainage layers
Sump pits
Perimeter drains

Testing available:

Moisture testing
Calcium chloride
Relative humidity
pH testing
Adhesion testing

Cost Considerations

Price Factors

Slab thickness
Site accessibility
Reinforcement type
Finish requirements
Special features

Typical Project Costs

500 sq ft basement: $4,000-$6,000
2-car garage: $6,000-$9,000
1000 sq ft addition: $12,000-$18,000
Heated garage: $8,000-$12,000

Additional Costs

Excavation: $50-$100/cubic yard
Old slab removal: $3-$5/sq ft
Radiant heating: $8-$12/sq ft
Decorative finishes: $2-$8/sq ft
Vapor barriers: $0.50-$1/sq ft

Quality Control

During Construction

Subgrade testing
Concrete testing
Slump tests
Air content
Cylinder breaks

Finishing Standards

FF/FL numbers
Surface tolerance
Joint spacing
Crack control
Appearance

Long-term Performance

Proper curing
Joint maintenance
Surface sealers
Regular inspection
Warranty coverage

Common Problems Prevented

By Proper Design

Cracking
Settlement
Frost heave
Moisture issues
Surface defects

By Quality Installation

Uneven surfaces
Premature wear
Water problems
Structural failure
Costly repairs

Maintenance & Care

Initial Care

Curing period
Traffic restrictions
Temperature control
Moisture retention
Protection measures

Ongoing Maintenance

Joint sealing
Crack repair
Surface sealing
Cleaning methods
Preventive care

Green Building Options

Sustainable Materials

Recycled content
Local aggregates
Fly ash/slag
Reduced cement
Permeable options

Energy Efficiency

Insulated slabs
Thermal mass
Radiant barriers
Reflective surfaces
LEED points

Why Choose DrySpace

Our Advantages

Experienced crews
Modern equipment
Quality materials
Precise work
Warranty protection

Project Management

Clear scheduling
Daily updates
Clean sites
Safety focus
Final walkthrough

Get Started Today

Free estimate includes:

Site evaluation
Design consultation
Material options
Cost breakdown
Timeline planning

Call Now: (437) 545-0067

Quality concrete slabs built to last a lifetime.

Related Services

Complete Solutions for Your Basement

Since we're already working on your basement, consider these complementary services that save time and money when done together.

Professional Concrete Slab Solutions for Toronto Homes

A properly installed concrete slab forms the foundation of comfortable, dry living spaces. In Toronto’s climate, with its freeze-thaw cycles and varying soil conditions, professional slab installation makes the difference between a lifetime floor and costly failures. We specialize in basement slabs, garage floors, and structural applications, using techniques refined over 20 years of GTA projects.

Modern slab construction goes far beyond simply pouring concrete. Today’s systems incorporate vapor barriers, insulation, drainage layers, and precise reinforcement placement. For basement renovations, we often encounter 100-year-old dirt floors or deteriorating slabs poured without proper moisture protection. Our replacement process transforms these problem areas into dry, level surfaces ready for any flooring finish.

The investment in quality slab construction pays dividends through energy efficiency, moisture control, and structural integrity. Whether you’re finishing a basement, building a garage, or adding an addition, we ensure your concrete slab meets both current building codes and future needs. Our systematic approach includes soil analysis, proper base preparation, and quality concrete placement that creates floors lasting generations.

Advanced Techniques for Lasting Performance

Toronto’s unique challenges require specialized approaches to slab construction. The GTA’s clay soils can expand and contract significantly with moisture changes, potentially causing slab cracking or heaving. We address this with properly compacted granular bases, typically 6-8 inches of clear stone that provides stable support and drainage. This foundation layer is crucial for preventing the settlement issues common in older Toronto homes.

Moisture control represents another critical aspect of slab performance. We install 10-mil poly vapor barriers beneath all slabs, sealed at penetrations and lapped at joints. For basement applications, we often add rigid foam insulation, creating thermal breaks that prevent condensation and reduce heating costs by 15-20%. This attention to building science principles ensures comfortable, efficient spaces year-round.

Reinforcement design varies by application but always exceeds minimum standards. Basement slabs receive 6x6 W2.9 welded wire mesh or #3 rebar at 16" centers. Garage slabs require heavier reinforcement due to vehicle loads, typically #4 rebar at 12" centers. We position reinforcement at mid-depth using chairs, ensuring proper concrete coverage for corrosion protection. Control joints are cut within 24 hours to manage cracking, creating neat, straight lines rather than random cracks.

Specialized Services and Innovation

Radiant floor heating has become increasingly popular in Toronto homes, offering superior comfort and efficiency. We install hydronic tubing systems within slabs, working with mechanical contractors to ensure proper layout and controls. The thermal mass of concrete provides even heat distribution, eliminating cold spots common with forced-air systems. Installation adds $8-12 per square foot but can reduce heating costs by 20-30%.

For garage and commercial applications, we offer specialized finishes that enhance durability and appearance. Epoxy coatings provide chemical resistance and easy cleaning, while polished concrete creates an attractive, low-maintenance surface. These finishes transform utilitarian slabs into showpiece floors, particularly popular in Toronto’s condo garages and retail spaces.

Our approach to existing slab replacement minimizes disruption while ensuring superior results. We use specialized equipment for interior demolition, controlling dust and debris. The process typically takes 5-7 days for a standard basement, including removal, base preparation, and new concrete placement. We coordinate with other trades to relocate utilities and ensure proper drainage connections, delivering turnkey solutions that prepare spaces for immediate finishing.

Testimonials

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FAQ

Frequently Asked Questions

Get answers to common questions about slab & foundation construction | concrete floors toronto.

Concrete slab costs in Toronto depend on type, thickness, and site conditions:
Basement Floor Slabs:
- Basic 4" slab with vapor barrier: $8-10 per square foot
- Insulated slab with drainage: $10-12 per square foot
- Radiant heat slab: $18-22 per square foot
Garage Floor Slabs:
- Standard 4" slab: $10-12 per square foot
- Heavy-duty 6" slab: $12-15 per square foot
- With epoxy coating: $15-20 per square foot
Additional costs:
- Old slab removal: $3-5 per square foot
- Excavation/base prep: $2-4 per square foot
- Permits: $200-500
A typical 600 square foot basement slab replacement costs $6,000-8,000 including removal and disposal. Larger projects often have lower per-square-foot costs due to efficiency.
Slab thickness requirements in Toronto depend on use and loads:
Residential Applications:
- Basement floors: 4 inches (100mm) minimum
- Garage floors: 4-5 inches for cars, 6 inches for trucks
- Patios/walkways: 4 inches
- Driveways: 5-6 inches
Commercial/Special Uses:
- Workshop floors: 5-6 inches
- Industrial: 6-8 inches or engineered
- Heated slabs: 4 inches minimum above tubes
Ontario Building Code specifies minimum 3.5 inches for residential basement slabs, but we recommend 4 inches for better performance. Thicker slabs resist cracking and provide better insulation value. Edge thickness often increases to 8-12 inches for frost protection. Our engineers calculate exact requirements based on soil conditions and intended loads.
Yes, we pour concrete year-round in Toronto using cold weather procedures:
Winter Concrete Practices:
- Heated enclosures maintain 10°C minimum
- Hot water in mix design
- Accelerating admixtures reduce set time
- Insulation blankets for curing
- Extended curing period (7 days minimum)
Temperature Thresholds:
- Above 5°C: Standard procedures
- 0-5°C: Cold weather precautions
- Below 0°C: Full winter protection
- Below -10°C: Evaluate case-by-case
Winter pours typically add 15-25% to costs due to heating, additives, and protection measures. However, interior slabs like basements can proceed year-round with minimal impact. We monitor concrete temperature for 72 hours ensuring proper strength gain. Many clients prefer winter work for interior projects due to contractor availability and competitive pricing.
Concrete gains strength progressively, with different uses allowed at various stages:
Timeline for Use:
- 24 hours: Light foot traffic, saw-cut control joints
- 3 days: Normal foot traffic, remove forms
- 7 days: Light construction activity
- 14 days: Vehicle traffic (driveways/garages)
- 28 days: Full design strength, heavy loads
Finishing Activities:
- Framing walls: 3-7 days
- Installing flooring: 28 days (moisture dependent)
- Epoxy coatings: 28 days minimum
- Tile installation: 28 days, moisture test required
Curing is critical for strength and durability. We use curing compounds or plastic sheeting to retain moisture for 7 days minimum. Basement slabs often require moisture testing before flooring installation – concrete releases moisture for several months. Premature loading or finishing can cause failures, so we provide detailed schedules for follow-up work.

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Slab & Foundation Construction | Concrete Floors TorontoPremium concrete slab installation for basements, garages, and structural applications – level, durable, and built to last