REGUPOL solar alu is a protection layer for flat roof constructions in accordance with DIN 18531 and flat roof guidelines.The product is designed for the installation of photovoltaic and solar systems on flat roofs, including non rubber-compatible waterproofing systems. It consists of PUR-bonded rubber granules and is laminated with an aluminium triplex foil on the underside.This layer prevents interactions such as plasticiser migration between the waterproofing membrane and the protection layer. REGUPOL solar alu is used to protect waterproofing systems against mechanical and thermal impact.The product is pressure-resistant, elastic and resistant to microorganisms, ageing and temperature. It is vapour-permeable, rot-proof and antistatic according to EN 181