Industrial Floor Flatness & Levelness Testing (FF/FL & F-min)
Independent third-party ASTM E1155, CSA A23.1, and Allen Face–certified verification for warehouses, racking, and construction projects across the Greater Toronto Area (GTA), available for night-shift testing with instant online pricing.
Certifications & Standards
Allen Face F-Number Certified Operator (Course completed 2026)
Fully compliant with ASTM E1155 & ACI 117
Independent – No grinding or placing conflicts
$2M Professional Liability Insurance
About TrueFlat
TrueFlat Testing provides independent, third-party floor flatness and levelness verification for industrial, commercial, and warehouse environments across the Greater Toronto Area.
We specialize in FF/FL (ASTM E1155) testing, F-min defined-traffic measurements, and detailed digital reporting for racking installers, automation integrators, concrete contractors, and facility owners.Our mission is simple:
deliver accurate, unbiased, standards-based results that our clients can trust.
Why Hire Us
Independent, Third-Party Testing
We are completely independent and not affiliated with concrete contractors, racking installers, or grinding companies.
Our measurements are unbiased, conflict-free, and fully standards-based.
Transparent, Up-Front Pricing
We provide instant online pricing with no hidden fees.
You’ll know your exact cost before booking — clear, predictable, transparent.
Fast Turnaround & Night-Shift Availability
We work after hours to avoid disrupting warehouse operations.
Flexible scheduling + fast digital reporting keeps your project moving.
ASTM & CSA Compliant
We follow ASTM E1155, CSA A23.1, and F-min procedures to ensure accurate and industry-accepted results.
Professional Digital Reporting
Each job includes a clean, easy-to-read PDF report with F-Numbers, elevation profiles, and pass/fail evaluations.
Reliable & Easy to Work With
Simple booking, quick communication, and a consistent technical process make your inspection hassle-free.
Trusted by Contractors & Warehouse Operators
Ideal for concrete pours, warehouse commissioning, racking installation, and automation projects.
FF/FL Floor Flatness & Levelness Testing (ASTM E1155)
We provide accurate, standards-based floor flatness and levelness measurement for new concrete slabs and existing warehouse floors.
Our FF (Flatness) and FL (Levelness) testing follows the ASTM E1155 and CSA A23.1 procedures, delivering precise F-Numbers and a clear pass/fail evaluation. Ideal for:
Warehouse slabs
Industrial facilities
Distribution centers
Retail and commercial concrete floors
General contractors & concrete contractors
You receive a digital report that includes:
FF & FL values (Local & Overall)
Measurement line diagrams
Elevation profile graphs
Tolerance comparison
Pass/Fail summary
F-min Testing for VNA (Very Narrow Aisle) Warehouses
We measure defined-traffic wheel paths for VNA forklifts, AGVs, and robotic systems.
Our F-min verification ensures your aisles meet the strict tolerances required for safe and efficient high-bay operations. Used by:
Racking installers
Automation integrators
Robotic & AGV system vendors
High-bay distribution centers
Includes:
Left/right wheel-path profiling
F-min calculations
Elevation deviation graphs
Compliance report for commissioning
Retest After Grinding / Repairs
If grinding or correction work is completed, we offer fast retesting with focused FF/FL or F-min verification in the repaired areas.
Perfect for:
Contractors needing confirmation before handover
Racking installers needing final approval
Digital Reporting
All services include a professional digital report (PDF) featuring:
F-Number summary
Detailed line-by-line breakdown
Profile charts
Tolerance comparison
Notes & photographic documentation (if requested)
Independent Third-Party Verification
TrueFlat Testing is completely independent.
We are not affiliated with any contractors, racking companies, or concrete finishing firms. We provide:
Unbiased testing
Conflict-free results
Reports suitable for engineers, inspectors, and project owners
Night-Shift Testing (No Downtime)
We specialize in after-hours and night-shift service, allowing you to keep your warehouse and construction site fully operational.
This avoids shutdowns, forklift interruptions, and daytime disruptions.
Service Area
We serve:
Greater Toronto Area (GTA)
Hamilton
Kitchener / Waterloo
London
Barrie
Oshawa
Surrounding Ontario regions
Our Process
1. Instant Online Price
Start by using our instant pricing tool. Choose your service type, enter the total square footage, and get a clear, upfront cost with no hidden fees.
2. Submit Project Details
Once you're satisfied with the estimate, provide your:
Project address
Preferred date & time
Contact information
Any notes or special requirements
Your request is sent directly to our team for review.
3. Confirmation & Scheduling
We will review your request and confirm your booking within 24 hours. If needed, we may suggest an alternate time or date based on availability. Most testing is performed after hours or overnight to prevent any disruption to your warehouse operations.
4. On-Site Testing
We arrive on time with professional-grade equipment to perform the required testing based on your project needs:
FF/FL (ASTM E1155) testing
F-min defined-traffic testing
Our testing is fully independent, unbiased, and standards-based.
5. Data Analysis
After testing, we analyze your results using:
Measurement line profiles
F-number calculations
Defined wheel-path evaluations
Tolerance comparisons
Elevation deviation graphs
Our process ensures accuracy and complete compliance.
6. Digital Report Delivery
You receive a clean, professional PDF report that includes:
FF/FL or F-min results
Local & overall values
Graphical profiles
Pass/fail summary
Notes & recommendations
Reports are typically delivered within 48 hours, with rush delivery available.
7. Retesting (If Needed)
If grinding or corrections are completed, we can return for focused retesting to confirm compliance before handover or racking installation.
Pricing
We are fully transparent with our pricing. Our service rates are based on a fixed base fee plus a small charge per square foot:
FF/FL Testing: $1400 + (0.04×Total sqft) + HSTF-min Testing: $2300 + (0.07×Total sqft) + HST
Additional Notes:
A travel charge of $150 applies to sites located outside the Greater Toronto Area.
Revisits are billed at 50% of the original quotation.
We require a 50% deposit to secure your testing date, with the remaining 50% due upon delivery of the final report. This system ensures confirmed scheduling, fast turnaround, and protects both parties from last-minute cancellations.
Contact Us
We will contact you within 24 hours by email with an official work quotation, a proposed date and time, a request for the site contact information for the person our technician will meet on-site, and a payment link to complete the 50% deposit and secure your booking.
Thank You
We will contact you within 24 hours by email with:
Official work quotation
Proposed date and time
Request for the site contact information for the person our technician will meet on-site.
Payment link to complete the 50% Deposit and secure your booking.
FF/FL Floor Flatness & Levelness Testing
Dipstick
FF/FL Floor Flatness & Levelness Testing
(ASTM E1155 • CSA A23.1 Compliance)FF/FL testing is the industry-standard method used to evaluate the flatness (FF) and levelness (FL) of newly poured or existing concrete floors. It is required in most commercial and industrial construction projects to ensure that floors meet the performance criteria specified by engineers, architects, and building codes.
Why FF/FL Matters
Ensures the slab meets construction specifications
Reduces uneven surfaces that can affect equipment or racking
Helps prevent issues with forklifts, pallet jacks, and rolling equipment
Identifies areas needing grinding or correction before handover
How It Works
FF/FL values are collected using measurements taken along multiple test lines across the slab.
Flatness (FF): Measures surface smoothness — how much the floor varies over short distances.
Levelness (FL): Measures the overall slope — how much the floor deviates over longer distances.
Standards & Compliance
ASTM E1155 defines the testing procedures and calculation of FF/FL numbers.
CSA A23.1 (Canada) requires that concrete slabs in industrial and commercial buildings be tested and meet the specified FF/FL tolerances.
Testing is mandatory for many slab-on-grade, warehouse, and large commercial projects.
All testing performed by TrueFlat Testing follows CSA A23.1 requirements and the official ASTM E1155 methodology.
F-min Testing for VNA (Very Narrow Aisle) Warehouses
Profileograph
(ASTM E1155 • CSA A23.1 Compliance for Defined-Traffic Floors)F-min testing is a more precise form of floor evaluation used specifically for VNA (Very Narrow Aisle) warehouse environments where high-reach forklifts operate along fixed wheel paths.
This testing is essential for ensuring safety and stability in high-bay racking systems.
Why F-min Is Needed
VNA forklifts operate on a fixed track, meaning even small irregularities in the floor can cause:
Operator vibration and safety risks
Reduced forklift speed
Increased maintenance costs
Damage to racking or inventory
Poor performance of AGVs or robotic systems
F-min ensures the aisle floor is smooth enough for forklifts to travel safely at their designed speeds.
How It Works
Measurements are taken along each forklift wheel path (left and right).
Results are compared to the F-min tolerances specified by the equipment manufacturer (e.g., F-min 50, F-min 75).
The higher the F-min number, the tighter the tolerance and smoother the floor.
Standards & Compliance
Although F-min is not described in CSA A23.1, the standard requires compliance with defined-traffic specifications, which F-min fulfills.
All floor measurement procedures follow ASTM E1155, adapted for defined-traffic aisles.
Many racking installers and equipment suppliers require a passing F-min report before commissioning.
TrueFlat Testing performs all F-min surveys using industry-approved procedures aligned with CSA A23.1 and ASTM E1155 requirements for defined-traffic floors.