Elastomeric roof coatings are flexible coatings which extend the roof’s lifetime by protecting the substrate against UV radiation, temperature, hail, and other damage. Fluid applied roofing membranes are a composite technology where such coatings are cured with a reinforcing mesh embedded between multiple layers of the coating to create a seamless, reinforced flexible membrane. The membrane is part of a multi-component system designed to waterproof new and existing low slope roofs with positive drainage. Liquid applied membrane systems are also used to treat flashings, seams, or around areas of complicated penetrations. Beyond providing a protective coat, such membranes may serve to recover a damaged roof or even be used as a stand-alone roofing system.<br/><br/>The test protocols for each of the respective components of the composite are well established, but currently, the testing methodology for a liquid applied roofing membrane is lagging, and data regarding these membranes has been sporadically published using disparate methods. Currently ASTM D08.25.02 is working on developing a suite of test methods that will ultimately be used to develop specifications for fluid applied membranes based on a variety of coating technologies. As part of this work, Dow has evaluated techniques for building up fluid applied membranes, as well as a range of test methods potentially suitable for testing the performance of the resulting membranes. The application technique has been shown to affect the membrane’s performance, suggesting that a systematic approach to the application and buildup of these membranes provides more reproducible test results. Assessment of potential test methods adapted from a range of membrane specifications highlights the suitability of several that lend themselves to liquid applied membranes. Liquid applied membranes were evaluated for physical and mechanical performance with a focus on ascertaining the composite membrane performance and directing future protocols.

Fluid applied roofing membranes: Techniques and test methods

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.