Roof membrane blow-off often is caused by inadequate attachment of edge flashings and copings. Until about a decade ago, it was common for edge flashings and copings to be weaker than the nailers to which they were attached. But with the incorporation of ANSI/SPRI ES-1 into the 2003 edition of the International Building Code, this has changed. It is vital nailers be appropriately designed and installed to achieve good wind performance offered by edge flashings and copings that comply with ANSI-SPRI ES-1.
From their early uses in the 1990s, cool roofs have been said to cause moisture accumulation in low-slope roof systems throughout the U.S. in hot and cold climates. This urban legend says an owner or designer should avoid a cool roof because it will accumulate more moisture underneath it when compared with nonreflective membranes. However, when physics are used to evaluate moisture accumulation in highly reflective roof systems, this roofing industry urban legend can be disproved.
James Myers Co. Inc., Beltsville, Md., performed a roofing renovation project on four buildings—a potting shed, refectory, guest house and operations building—at Dumbarton Oaks estate, Washington, D.C. More than 133 square feet of slate, 5,550 pounds of copper, 5,000 pounds of lead-coated copper and 12,000 pounds of 3-pound lead were used to reroof the four buildings. For its exceptional work, James Myers received a Gold Circle Awards honorable mention.
State laws been changing regarding payment for retainage for construction projects. Roofing contractors should be familiar with statutes governing retainage in the states where they work to ensure they receive retainage in accordance with the law of that state and that they comply with the law when dealing with subcontractors and sub-subcontractors.
by Rob Foote
CNA, NRCA's endorsed insurance provider, now offers errors and omissions, professional and pollution-incident liability coverage for roofing contractors. Most roofing contractors do not want to increase their insurance budgets by adding optional insurance coverages for errors and omissions and pollution/mold coverages, but taking an effective risk-reduction approach will help protect your balance sheet from unfunded losses from design errors and mold claims that could impair your company’s ability to meet ongoing and future financial obligations.
The International Code Council (ICC) recently updated and published revised editions of its model codes, referred to as "I-codes." As jurisdictions begin the processes of updating their codes, roofing contractors should be aware of the roofing-related changes incorporated into the 2015 I-codes and begin preparing for the new codes' adoptions in the areas where they do business. ICC intends for the latest edition of the I-codes to be adopted by jurisdictions beginning this year.
The March issue features a look at why it is vital nailers be properly designed and installed; how physics can disprove an urban legend about moisture accumulation in cool roofs; a major reroofing project at Dumbarton Oaks estate, Washington, D.C.; laws governing retainage for construction projects around the U.S.; a new type of insurance policy designed for roofing contractors; and a recap of recent changes to the International Code Council's model codes.
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