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 moreDo Your Roofing Materials Meet Climate Regulations? Let’s Check.
In early 2021, new regulations took effect in the U.S. to phase out harmful greenhouse gases called hydrofluorocarbons, or HFCs. HFCs are made up of fluorine and hydrogen atoms. They are found in blowing agents used in spray foam roof adhesive and insulation. The industrial chemical allows the material to “foam up,” expand, and deliver great thermal resistance (R-value). Hydrofluorocarbons are also found in air conditioning and refrigeration systems. While HFCs have great thermal resistance, they also come with high global warming potential (GWP). Products with high GWP trap more heat in the earth's atmosphere and thus contribute more to global warming. Long story short — HFCs are bad for the environment. When...
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 moreFall Roof Maintenance
Like it or not, summer is over! Autumn is upon us. On the bright side, fall is a great time for many of us to enjoy the changing foliage, and the cooler weather can be a welcome reprieve from the hot days of summer. Fall is also an important time to inspect your roof. You may choose to perform an inspection yourself or call in a GenFlex Licensed Applicator to conduct a more comprehensive inspection. Fall inspections are important since they can uncover damage from summer storms, but fall is also a good time to perform needed maintenance to prepare your roof for winter. What to Look For You want to look for physical damage to the roof such as cuts, punctures, or tears in the roofing membrane or flashings. For a low-sloped roof, a...
read moreGenFlex TPO Membrane Glossy to Matte Aesthetic Finish Transition
GenFlex is changing the aesthetics of 19 skus to address the needs of our customers. This will change the previous glossy finish, to a matte finish, which matches the aesthetics of GenFlex’s other matte finish TPO skus. Additionally, the aesthetic change also creates the need for new skus, to identify and differentiate the new matte finish membrane vs. the previously glossy finish membrane. Full details of the aesthetic transition are listed as follows. Membrane Finish Change Details New matte finish TPO membrane production start date: August 30th, 2021 19 skus Affects 6’, 12’ & XR (Fleece-Back) TPO membranes Glossy skus will no longer be produced after August 30th, 2021 The change in finish allows for TPO membrane...
read moreGenFlex Celebrates 40 Years of Business
The year 2021 marks four decades of business for GenFlex, a leader in commercial roofing product development, distribution, and training. To date, more than a billion square feet of GenFlex roofing membrane has been installed across North America! You'll find GenFlex products covering structures from Virginia to California, including high schools, churches, apartment complexes, stadiums, and more. In honor of the occasion, we spoke with two GenFlex veterans who've watched the company and product catalog grow and evolve, and their teammates grow alongside it, too. Rewind! A Look Back at GenFlex While GenFlex's history with EPDM systems dates back to 1981, the company's roots trace back much further to 1915 with General Tire. General...
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