Masonry Magazine March 2008 Page. 31
At every vertical nine-foot, four-inch point, there is a relief angle that needs to be flashed. The flashing called out was Hohmann & Barnard's Flex Flash, a 40-mil, self-adhering membrane.
"In each case, at the top there was a stainless-steel termination bar that was attached to the structure of the building with screws and then caulked," he says. "Then the flashing ran down on top of the relief angles, so the relief angle had to be primed and sealed with a bead of caulk. A three-inch-deep piece of stainless-steel drip edge was installed on the horizontal portion of the angle with caulk. The Flex-Flash flashing was then installed on top of the drip edge and sealed with a bead of caulk. So, there was extensive use of a Dow Corning caulk on this project as well."
Heitkamp had crews dedicated to putting down flashing. "The flashing had to be there before we could put the brick down," says Hart. "We had two crews of three bricklayers, and all they did was install flashing ahead of us. Then, after the flashing was down, we videotaped both the installation and the finished product before we laid a brick down."
Hart suggests other contractors faced with similar expanded requirements follow some precautions. "First, be sure you fully understand the installation methods required by the architect, consultants and owners. Second, document very carefully the installation procedures, so if the building should get water in it, you are assured that you're work, or lack of work, was not the cause of any leaking in the building.
"Third, insist on pre-testing the system," he continues. "That was something we insisted on, and the engineer really liked the suggestion that this flashing system get thoroughly tested, both for water penetration and what might happen in the event of a seismic occurrence. With the pretest, you're assured that, if the system passes, it will perform in the event of a catastrophic seismic event or any massive rain."
Finally, get the material vendor to help. Hohmann and Barnard provided on-site help for Hart's crews. "We had them come out twice to review our installation methods and critique them to ensure we were doing it per the manufacturer's suggested methods," he says. "They, in turn, wrote a formal report to the general contractor and the owner saying that we were above and beyond compliance."
COMING FEBRUARY 2008
THE NEW HOHMANN AND BARNARD WEBSITE
www.h-b.com
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