Masonry Magazine December 2010 Page. 20
MOISTURE CONTROL
and continue to lay directly on top of the flashing course. A quick precut piece of drainage material is placed in the course above to keep mortar droppings clear of the weeps. Sometimes a quick flip with a pointing tool is required to ensure that the weeps are clear (see Figure 2, page 16).
Reflecting on a project
WITH ALL OF THE FLASHING OPTIONS available, whether metal, membrane or fabric, it is important to remember that flashings are a key ingredient in a well-crafted installation. When installed correctly, they can repay the mason big dividends in the form of repeat customers and fewer project call backs. The ability to reflect on a project with pride of a job well done is what we work so hard for in this industry.
Steven Fechino is engineering and construction manager with Mortar Net USA, makers of TotalFlash and Blok-Flash. For more information, call 800-664-6638, or visit www.mortarnet.com.
Bulletin Available
BASF's Technical Bulletin
Reviews Essential Qualifications
A new technical bulletin from BASF Wall Systems describes a key test and two Acceptance Criteria that should be considered when evaluating air/water-resistive barriers. The purpose and procedures of each qualification are concisely outlined. Results of tests conducted on BASF's Enershield air/water-resistive barriers are also included, as well as summary discussions of the meaning of the results.
ASTM E2357 Air Leakage of Air Barrier Assemblies is a key test designed to determine whether air barrier products, when used with other typical wall components, collectively function as an air barrier assembly. The Acceptance Criteria covered in the document are ICC-ES AC148 Acceptance Criteria for Flexible Flashing Materials and ICC-ES AC212 Acceptance Criteria for Water-Resistive Coatings used as Water-Resistive Barriers over Exterior Sheathing. Both were completed according to test methods established by the International Code Council for demonstrating the effectiveness of water-resistive barrier and flexible flashing materials. The bulletin recommends that specifiers require the results of these rigorous tests, along with testing required by the Air Barrier Association of America, to qualify acceptable materials for their specifications.
The bulletin and other technical literature are available as downloads at www.enershield.basf.com.
Building with brick or stone?
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