There are online instructional videos to teach just about everything-from playing your favorite guitar riff to installing dual-pane windows. But when you search for "how to mount PV modules on the roof," you will most likely get an outdated video showing improper roof penetrations that actually void roof warranties and violate roofing codes and standards. Only in the past few years have manufacturers designed mounting and waterproof flashing systems that are easy to install and meet the codes (see "Modern PV Roof Mounting" in HP137).
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