FF/FL & F-min Industrial Floor Flatness and Levelness Testing

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) and surrounding areas, available for night-shift testing with instant online pricing.

More than 700,000 square feet independently tested and verified using Dipsticks and Profileographs.

  • Allen Face F-Number Certified Technicians

  • Fully compliant with ASTM E1155 & CSA A23.1

  • 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 and surrounding areas.
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’ve included our full pricing structure on the "View Price & Contact Us" page with no hidden fees. You’ll know the exact cost before booking — clear, predictable, and transparent.

  • Fast turnaround and night-shift availability at no additional cost.

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.

  • Proudly Local Canadian Company

We are a locally operated Canadian business, proudly serving the GTA with reliable, high-quality testing services. Our commitment to local contractors and builders ensures fast response times, clear communication, and a trusted partnership you can count on.

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) at no additional cost.

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 reviewing how we calculate our pricing using simple, straightforward formulas with no hidden fees.

2. Submit Project Details

Once you're satisfied with our pricing, please complete all three sections of the Contact Us form: Contact Information, Site Information, and Service Details. Your request is sent directly to our team for review.

3. Confirmation & Scheduling

We will contact you within 1 to 8 hours by email with an official quotation, a proposed date and time (typically matching your request, with minor adjustments only when necessary), a request for on-site contact details for the person our technician will meet, and a payment link to complete the 50% deposit and secure your booking.

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. Digital Report Delivery

Once we receive the remaining 50% of the billed amount, we will email you a clean, professional PDF report.

Reports are typically delivered within 48-72 hours, with rush delivery available.

6. Retesting (If Needed)

If grinding or corrective work is completed, we can return for focused retesting to confirm compliance before handover or racking installation. Revisits are billed at 50% of the original quotation.

Pricing

We are fully transparent with our pricing. Our service rates are based on a fixed base fee plus a 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

Please enter an accurate email address, as it will be our primary method of communication regarding your quote and test scheduling.

A travel charge of $150 applies to sites located outside the Greater Toronto Area.

We will aim to match your requested date and time; however, we may suggest an alternative schedule based on availability. Reports are delivered within 24–48 hours after testing.

We will contact you within 1 to 8 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.

Have Questions? Call us.

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.