hanger bolts. PVOverRoof ™ works on fibre-cement (and older asbestos–cement) roofs and roof sheet suppliers have fully endorsed it. • The key to PVOverRoof™ is a structure that only connects to the building’s rafters. A series of sturdy aluminium beams bridge between the rafters that directly support the PV modules. The small number of rafter mounting points are fitted with a flashing system eliminating any chance of leaks in these areas with the remaining roof surface left untouched. • The PV modules are suspended above the roof surface thus module cooling is maximised. This, along with a module spacing of 20mm, ensures any existing transparent roof panels still maintain a reasonable light level in the building. If a roof sheet needs replacing, this is easily achieved because only the modules directly above the damaged roof sheet need to be removed, and with PVOverRoof ™ there are no penetrations into the sheet itself, so consequently there is no need to strip out large areas as typically applies when using a hanger bolt/rail type solution. The final installation meets all UK snow and wind loading requirements (subject to a building survey and, if required, frame strengthening). • PVOverRoof™ also solves any loading problems with timber purlins or lightweight zed purlins. • With PVOverRoof™ you can enjoy all the benefits of PV on your roof without in any way compromising the integrity or life span of your roof - it can even be argued using PVOverRoof™ extends the life of the roof. This solution maintains your roof sheet guarantee and bankability and insurance are a given. PVOverRoof Series 2 TM
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