Solar Builder

MAY-JUN 2018

Solar Builder focuses on the installation/construction of solar PV systems. We cover the latest PV technology (modules, mounting, inverters, storage, BOS) and equip installers/contractors with tips and tools to make informed purchasing decisions.

Issue link: http://digital.solarbuildermag.com/i/979544

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SOLARBUILDERMAG.COM | 35 Everything you need to know about protecting a commercial roof during a PV installation By Peter Corsi scratches to the surface. Any such damage should be circled and reported immediately so that it may be repaired quickly. Panels must not be placed over damaged areas until the damage is repaired. Treads on wheeled equipment should be covered or other pre- cautions taken to ensure that gravel embedded in the treads does not create a membrane puncture hazard. Motorized equipment should be limited to those that can start and stop gradually to minimize horizontal pulls on the membrane. Avoid damage to the foam board insulation layer below the membrane by: Place all pallet loads on foam board sheets or similar materials that can spread the load without damaging the membrane or insulation below. Protect areas that are frequently traveled with plywood or OSB boards (weighted down whenever necessary to prevent uplift by wind). Also, wherever possible, frequently change the travel path location. Avoid separation of the membrane f rom the insulation by placing a layer of spaghetti matting (or similar approved matting material) on areas that will be rolled over more than two or three times. Any damage to the roof must be identified with a clear mark on the roof immediately after it occurs, and it should be promptly reported to the construction manager. Protection procedures For hoist landing areas and rooftop storage of any material in excess of 15 lbs/sf, use a rigid temporary protection system con- sisting of sheets of plywood or OSB, applied unadhered on the roof. Fully cover scheduled work areas with loosely abutting plywood sections, and apply dunnage insulation pieces between plywood sections and the roof membrane for heavy access or traffic conditions. Protect the plywood sections f rom wind dis- placement. Remove temporary rigid protection promptly upon completion of hoisting, loading or heavy traffic work. When constructing ramps and work platforms, protect the roofing by arranging pieces of dunnage insulation between the ramp leading edges and all ramp/platform sleeper and support contact points. Utilize temporary flexible protection consisting of rolls of walk mat material at all traffic lanes, which are essentially any areas subject to repeat or routine movement of personnel or carted materials. Loose walk mat material should be picked up

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