Low-rise foam adhesive has been used to bond layers of polyisocyanurate roofing insulation for many years, yet little testing and research had been conducted to determine the optimal spacing and strength of cartridge-dispensed adhesive ribbons, particularly on full-size insulation panels. In 2019, the Midwest Roofing Contractors Association (MRCA) engaged WJE to investigate the effect of variable ribbon spacing on the adhesive’s bond capacity with polyisocyanurate insulation using three different ribbon spacings on two facer types and measuring the direct tensile loads at failure. Our findings were shared in 2019 and 2020 and can be viewed in this webinar.
MRCA subsequently engaged WJE to build on the low-rise foam adhesive research and testing by studying the effects of shelf life and application temperature on the tensile strength of the adhesive, physically and chemically testing products made by two manufacturers.
In this webinar, WJE architect Heidi Mase, chemist Jeff Plumridge, and roofing expert Patrick Shaughnessy provide an overview of our 2020-2021 research and testing program and will summarize findings and conclusions.