POLYDAN PRO NOX FM 50/GP.

Deck surfaces must be dry, clean and free from sharp projections such as nail heads and concrete nibs. When bonding the substrate should be prepared using a primer either Impridan 100, CURIDAN, MAXDAN or MAXDAN CAUCHO at the recommended rate prior to installation of the waterproofing system. The membrane may be laid in conditions normal to roofing work and must not be laid in rain, snow or heavy fog, nor if the temperature falls below 5ºC, unless precautions against condensation have been taken. The roofing layers must always be installed with staggered overlaps and in such a manner that no counter-seams in the direction of the outlets are made. The first layer of the waterproofing system (if necessary) is installed either fully bonded or partially bonded. Fully bonded torch-applied membranes should only be used with non-combustible substrates and with surfaces designed to enable the torch application of subsequent layers. When partially bonded either a layer of GLASDAN 800 P PERFORADO or other suitable venting layer is loose-laid across the substrate edge to edge before applying the first layer. The POLYDAN 48 P PARKING is laid over the first layer (if necessary) or over the venting layer in the same direction, and fully bonded. The top layer is installed with side laps a minimum of 80 mm and end laps 100 mm wide. Laps between the membrane and any base sheets should be offset by a minimum of 300 mm. Bonding is achieved by melting the lower surface by torching and pressing the membrane down. Care must be taken not to overheat the membrane.
In general, the installation of the rolling layer on-site is done as soon as possible, in order to prevent possible punctures of the waterproofing membrane. The material will be gathered in such a way that the waterproofing is not punctured and using suitable protection. Before the placement of the rolling layer, special care will be taken not to work and/or travel on top of the waterproofing, in order to prevent possible mechanical damage to the waterproofing membrane. Otherwise suitable protection must be used (mortar layers, anti-puncture geotextile sheets, etc.). If the pavement is asphalt, the following precautions must be adopted: The spreader used will be on wheels and in the case of crawlers the tracks will be rubber. The travelling speed of the spreader on top of the waterproofing will be less than 10 km/h, breaking and brusque acceleration will be avoided to prevent damage to the waterproofing. Turns while stopped will be avoided and turns must have a large radius. The compacter will move behind the spreader and will always travel over the asphalt layer.