Back to Specifying a Floor

Padded Polyurethane Floor System

Part One - General

1.1 Description

  1. This document specifies the installation of a synthetic floor system comprised of a base mat laid in adhesive and a polyurethane surface that is field applied in a seamless monolithic application.
  2. The general contractor shall provide a concrete slab, smooth and level to a tolerance of 1/8” in a 10’ radius, subject to the approval of the flooring contractor.

    F-Numbers are not applicable for gymnasium slab applications. Labor and materials necessary to put the concrete slab in acceptable condition (high areas ground down and low areas filled with appropriate leveling compounds) shall be the responsibility of the general contractor. Installation shall not proceed until the concrete slab is in acceptable condition.
    1. The general contractor shall provide a slab per manufacturer’s specifications.
    2. Concrete subfloors shall have an adequate moisture barrier beneath and at the perimeter of the slab.
    3. Sand-Poly-Sand slab construction is not acceptable.
    4. Concrete shall not be over power troweled or “polished”
  3. The flooring contractor shall provide all tools and services to install a complete synthetic floor system, plus the installation of perimeter base moldings.

1.2 Quality Assurance

  1. The synthetic flooring materials shall be supplied by a MFMA Member manufacturer.
  2. The flooring contractor shall be an MFMA Member.

1.3 Working Conditions

  1. The synthetic floor materials shall not be installed until all masonry, plastering/drywalling, tile work and overhead mechanical trades are complete. All finish and/or wet trades, such as, concrete, painting, etc. should be completed and dry prior to the start of installation.  The area will be closed to all other trades for the duration of the installation and curing period.
  2. The building must be enclosed and weather tight with lockable doors at all entrances.
  3. Permanent heat, light and ventilation shall be installed and operating before, during and after installation.
  4. If synthetic materials are to be stored prior to installation they must be stored per supplier/manufacturers requirements for temperature and relative humidity levels.
  5. Installation temperature, relative humidity levels and slab temperature shall be per supplier/manufacturers recommended levels.
  6. The installation area shall be closed to all traffic and activity for a period to be set by the MFMA Sport Floor contractor.
  7. The concrete shall be clean, flat, dry and free from dirt, dust, oil, grease, paint, alkali and concrete drying agents, hardening and parting compounds, old adhesive residue, or other foreign materials. 
  8. Adhere to all MSDS requirements for materials. Protect all persons from exposure to hazardous materials.

1.4 Warranty

  1. The MFMA Member shall warrant the floor installation, and shall furnish a flooring materials warranty from the synthetic flooring supplier.
  2. Refer to individual synthetic flooring suppliers’ warranty for specific provisions and exclusions.

Part Two - Products

2.1 Materials

  1. The synthetic flooring materials shall be non-hazardous and not contain ANY lead, mercury, nor any heavy metals, PCB’s or formaldehyde and shall be supplied by a MFMA Mill member.
    1. Adhesive
      • One or two component.
    2. Base Mat
      • Prefabricated rubber mat as recommended by the synthetic floor supplier.
    3. Sealer
      • Two component polyurethane.
    4. Resin Layer(s)
      • Two component, self-leveling, seamless polyurethane material.
    5. Top Coat
      • A minimum two component, pigmented, self-leveling, seamless polyurethane material.  Colors to be selected from suppliers’ standard color chart.
    6. Game Line Paint
      • Minimum two component polyurethane line paint.  Colors to be selected from suppliers’ standard color chart.
    7. Wall Base (Optional)
      • Vinyl base; 4” high, select from wall base manufacturers standard color chart.

Part 3 - Execution

3.1 Pre-installation Inspection

  1. Inspect concrete slab for proper tolerance and dryness (ASTM F-710) and report any discrepancies in writing to the general contractor for correction.
  2. All work required to put the concrete slab in acceptable condition shall be the responsibility of the general contractor.
  3. The concrete slab shall be broom cleaned of all debris by general contractor as described in section 1.3.
  4. Installer shall document all working conditions provided in General Specifications prior to commencement of installation.

3.2 Installation

  1. Base Mat
    1. Unroll base mat and allow to relax.
    2. Thoroughly mix adhesive and apply directly to the concrete subfloor with a notched trowel per supplier’s instructions.
    3. Install base mat into freshly applied adhesive. Do not allow compression along the sides of the underlayment.
    4. Roll the base mat with a heavy floor roller and repeat if necessary.
  2. Sealer
    1. Thoroughly mix two component polyurethane seal coat
    2. Apply seal coat per supplier’s instructions using a flat steel trowel.
    3. Allow sealer coat(s) to cure before proceeding to next application.
  3. Resin Layer(s)
    1. Thoroughly mix two component, self-leveling, seamless polyurethane material.
    2. Apply resin layer(s) using a notched trowel, notched squeegee or Swedish knife to the supplier’s recommended thickness.  Materials must be applied continuously to create a monolithic surface.  Allow for proper curing between coats, if necessary.
    3. Repair any imperfections in the finished surface.
    4. Clean and tack clean prior to proceeding to next application.
  4. Top Coat
    1. Thoroughly mix pigmented, self-leveling, seamless polyurethane top coat.
    2. Apply top coat with a high solvent paint roller at the supplier’s recommended rate or by airless spray application.
    3. Allow top coat to cure per supplier’s recommendation.
  5. Game Line Paint
    1. Carefully mask out game lines with high quality masking tape.
    2. Thoroughly mix polyurethane line paint.
    3. Paint game lines as indicated on architectural drawings ensuring they are in compliance with any governing bodies.
    4. Remove masking tape while paint is still wet/tacky.
  6. Wall Base (Optional)
    1. Install vinyl base by anchoring to wall with base cement.
    2. Miter inside corners, and use premolded outside corners.

3.3 Protection

  1. No traffic or other trades shall be allowed on the surface for a period of one week following completion to allow for complete and proper cure of the finish.
  2. It shall be the responsibility of the general contractor to protect the surface from damage by other trades before acceptance by the owner or the owner's authorized agent.

Disclaimer: The MFMA provides general information to architects, specifiers and consumers. The MFMA, its members, officers and agents disclaim any responsibility whatsoever for the accuracy or applicability of these guidelines under all circumstances and conditions.

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