Technical Bulletin
Cold Weather Application Guide
COLD WEATHER APPLICATION GUIDELINES 2023-2024 Cold temperatures change the physical properties of adhesives, sealants, and primers, and alter the handling characteristics of roofing membranes due to increased rigidity. The information in this Bulletin is intended to help installers successfully apply GenFlex materials in cold weather. Holcim recommends cold weather application procedures be used when ambient and substrate conditions fall below 40 °F (4 °C). Refer to applicable Product Data Sheets (PDS) for specific storage and application recommendations. ADHESIVES, SEALANTS, AND PRIMERS STORAGE Store all adhesives, sealants, and primers between 60 °F (16 °C) and 80 °F (27 °C) to ensure proper mixing and...
read moreFanfold Technical Bulletin
EPS FANFOLD SHEATHING IN WARRANTED GENFLEX ROOFING SYSTEMS To better meet the needs of our customers, Holcim Solutions and Products US, LLC will allow the use of EPS Fanfold sheathing (“Fanfold”) in qualifying warranted GenFlex roofing systems. Fanfold must be Type VIII with a minimum thickness of 1/2″ (12.7 mm) and must meet the following minimum physical properties: Minimum Physical Properties Property ASTM Test Method Type VIII Compressive Strength D1621 13 psi (90 kPa) Density (Nominal) C 303 1.25 pcf (20 kg/m^3) Moisture Vapor Transmission E96 <1 perm (<57.5 ng/(Pa•s•m^2)) Water Absorption C272 <1% by volume Fanfold is allowed for Mechanically Attached applications of GenFlex EZ TPO...
read moreWarranty Services Bulletin
TO: GENFLEX™ APPLICATORS GENFLEX DISTRIBUTORS GENFLEX SALES REPRESENTATIVES RE: WINTER 2023 UPDATES Please be aware of the following updates for GenFlex roofing systems: As global supply constraints have steadily abated and availability of GenFlex-branded products has returned to normal, substitution requests will no longer be accepted for technical or warranty purposes absent extraordinary circumstances. Technical Deviation Requests to include non-GenFlex branded materials based on supply limitations must be submitted no later than February 28, 2023. All requests are subject to review. Holcim Building Envelope will honor existing approved product substitutions through 2023. Requests for Inspection (RFIs) with...
read moreTemporary Product Substitutions Update
While the roofing and waterproofing industries continue to be challenged by global supply constraints, GenFlex is committed to working with you to complete projects and satisfy customer expectations. This bulletin update confirms the continuation of the Temporary Product Substitution process. For a project with a product substitution to receive a GenFlex Roofing System Warranty, an approved Technical Deviation must be applied to the Pre-Installation Notice (PIN). PINs should be submitted at least two weeks prior to project start. Please contact your GenFlex Sales Representative or Regional Technical Coordinator for assistance submitting Technical Deviation Requests. Always provide the manufacturer’s Technical Information Sheet with...
read morePainting of Single-Ply Membrane
Technical Bulletin: Painting of Single-Ply Membrane GenFlex is sometimes asked to approve the application of painted logos on GenFlex single-ply membranes. Maintaining the building owner’s warranted GenFlex roofing system in a serviceable condition is of primary concern when considering any form of overburden, that is, any type of structure, covering, or surfacing that limits or restricts GenFlex’s ability to investigate and repair the warranted GenFlex roofing system. GenFlex considers paints and other surfacing that are not necessary for the performance of the GenFlex roofing system as overburden. There are numerous brands of tintable paints and coatings on the market. An Owner should choose the one that works best for...
read moreTemporary Product Substitutions
While the roofing and waterproofing industries continue to be challenged by global supply constraints, GenFlex is committed to working with you to complete projects and satisfy customer expectations. This bulletin outlines the product substitutions GenFlex will approve on an individual project basis while raw material shortages continue. For a project with a product substitution to receive a GenFlex Roofing System Warranty, an approved Technical Deviation must be applied to the Pre-Installation Notice (PIN). PINs should be submitted at least two weeks prior to project start. Please contact your GenFlex Sales Representative or Regional Technical Coordinator for assistance submitting Technical Deviation Requests. Always provide the...
read moreTan (HR) EZ TPO Announcement
GenFlex Introduces Tan (HR) EZ TPO GenFlex’s new Tan (HR) EZ TPO color has been slightly changed to be in compliance with higher reflectivity codes. Our new Tan (HR) EZ TPO features the same formulation & benefits of the original Tan membrane, but now with 15% improved Solar Reflectivity. The new membrane color meets California’s Title 24 rigorous requirement for reflectivity and will also be eligible for the LEED v4/v4.1 sustainable heat island effect credit. Tan (HR) EZ TPO membrane and accessories will fully replace the original Tan color TPO membrane and accessories effective December 31st, 2020. The new product information and transition plan is listed as follows. In Scope Products: • EZ TPO Membrane &...
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