Technical Services

Technical Updates

Technical Updates

Technical Updates:

Our Technical Services department monitors installation trends, to ensure that our recommendations are optimized for your success. It is sometimes required to adapt our existing recommendations. Current technical updates are listed below and can be searched by product, date or other search term.

Are you preparing for an ARDEX product installation? We recommend reviewing the technical data sheet and technical updates for each product prior to installation. Then, contact us to meet your local sales representative and obtain a job-specific recommendation for your project!

  • High Moisture Conditions and ARDEX Underlayments
    When considering the moisture content of a concrete slab and its resulting suitability to receive ARDEX underlayments without moisture mitigation, we currently defer to the manufacturers of the finishing materials (adhesives and floor coverings) being used. But now, with manufacturers offering resilient floor covering adhesives that are approved for installation at relative humidity levels above 80%, we are adjusting our position, as follows.
  • ARDEX Underlayments and Non-Porous Substrates
    We are writing to confirm our recommendations for ARDEX underlayments installed over ARDEX MC RAPID and other suitable non-porous substrates. As detailed in the charts below, several ARDEX underlayments can now be installed at a maximum thickness of 1/2” in these applications. Note that this results in fewer ARDEX MC RAPID applications requiring a sand broadcast, which is a positive change in light of the new OSHA regulations on crystalline silica.
  • Cold Weather Precautions for ARDEX and HENRY
    With winter approaching, we are writing to clarify our recommendations for storage, transport and installation of ARDEX and HENRY products during the colder months. General Information: Ideal storage and installation temperatures are detailed in the technical data sheet for each product. Never install ARDEX or HENRY products at substrate or ambient temperatures below 50°F (10°C). Note that, the colder the substrate and ambient temperatures, the longer the drying and/or cure times will be. Ensure that products are dried and/or cured prior to proceeding with subsequent installations and/or opening to traffic. Facilitate drying by circulating the air above the surface; do not blow air directly on the surface.
  • Clarification on Unsanded Materials and Crystalline Silica
    We are writing to address some industry confusion regarding unsanded patching and skim coating materials, such as ARDEX SKM, ARDEX FEATHER FINISH, ARDEX FORTI FINISH and similar competitive products. While sand is not an added component in these ARDEX unsanded product formulas, crystalline silica (sand) is listed as an ingredient on their safety data sheets (SDSs). This is due to the fact that crystalline silica is a naturally occurring component in several raw materials that are a part of the ARDEX unsanded product formulas, specifically limestone and Portland cement. Due to crystalline silica’s presence in limestone and Portland cement (as reported on their respective SDSs), and because both of these raw materials are part of the ARDEX formulas, a range of the “trace” silica that ultimately appears in our finished products must be estimated and reported.
  • ARDEX ARDIFIX™ Recommendation
    We are writing to clarify our recommendations for using ARDEX ARDIFIX to fill dormant cracks and dormant joints prior to the installation of flooring materials. Where an ARDEX underlayment and finish flooring will be installed, ARDEX ARDIFIX must be sand broadcasted to refusal while fresh. The sand broadcasted surface of the ARDEX ARDIFIX is required to create a bonding surface for the ARDEX underlayment.
  • High Rolling and High Point Loads Vinyl Flooring
    It has come to our attention that there is confusion in the market over when it is necessary to upgrade to a high-performance, high-solids, two-component epoxy adhesive for the vinyl flooring installations. First, it should be noted that, in general, resilient flooring manufacturers test in accordance with ASTM 970 – Standard Test Method for Static Load Limit, which measures a vinyl’s ability to withstand and recover from indentations introduced into the material through the application of a static point load. The Resilient Floor Covering Institute (RFCI), commenting on this testing methodology, has warned that the criteria for static loading as specified by ASTM 970 may be insufficient, particularly in regards to the ASTM 970’s deficiency in addressing dynamic loads. Citing RFCI’s definition of a dynamic load, “Dynamic loads are created when a load is placed on the floor, and then moved around the floor's surface by a rolling, sliding or dragging motion.” Based on this definition, loads such as these are common within the daily operation of a hospital or medical care facility. While vinyl flooring often is able to withstand static loads in accordance with ASTM 970, it may fail when those same loads become dynamic. The selection of the proper adhesive can help to mitigate the risk of static and dynamic loads from permanently deforming the vinyl flooring.
  • ARDEX SX™ Traffic Recommendations
    We are writing to clarify suitable traffic conditions for areas where ARDEX SX™ 100% Silicone Sealant for Tile and Stone Applications is used. ARDEX SX is suitable to receive pedestrian traffic in residential and light commercial applications. Please note that ARDEX SX is not recommended for floor installations in heavy commercial applications, such as airports and shopping malls. However, ARDEX SX is suitable for use in non-traffic areas and on walls in heavy commercial applications.
  • Recommendation Clarifications for Glass Tile Installations
    We are writing to clarify our recommendations for installing glass tiles. Please see the following chart; “X” denotes an approved application:
  • ARDEX UI 720™ FLEXBONE® Recommendation
    We are writing to clarify our recommendations for installing ARDEX UI 720 FLEXBONE over adhesive residue. If the adhesive residue is tacky, spread a polyethylene cleavage membrane or slip sheet (min. 4 mil thickness) over top prior to installing ARDEX UI 720 FLEXBONE. This will prevent the floating membrane from sticking to the adhesive.
  • Recommendations for Resin-Backed Tiles
    We are writing to clarify our recommendations for the installation of resin-backed tiles using ARDEX tile mortars. There are two options for this application: 1) onsite testing can be completed, or 2) a recommendation can be provided by the ARDEX Technical Service Department once the tile in question has been tested.