Waterproofing composite self adhesive membrane
The bituminous PLURA SELF-ADHESIVE membranes are the arrival point of the latest generation of membranes denominated “composite”.
These membranes are so defined because thanks to new manufacturing technologies it is possible to produce materials with differentiated waterproofing mass, which allow the optimal utilization of each components properties, satisfying the different requirements.
The production process avails itself of three different compound types, manufactured in separate dissolvers and sent to the respective areas of application on the production line.
The first session allows the impregnation of the reinforcement which is a continuous single strand polyester using a particular compound suitable in saturating all its porosities, providing compatibility and promoting the elasticity or plasticity properties of the different applied compounds be they on the top or bottom surface.
During the second session a different compound is applied on the top surface depending on the destination of use of the membrane.
During the third session a particular compound with excellent self adhesive properties is applied on the lower surface, the thickness of which is calibrated.
The PLURA SELF-ADHESIVE membranes are capable of resolving specific application and functional requirements and present numerous and important advantages, such as ease of application with consequential savings on time and the possibility to apply the material on surfaces which are not suitable to open flame. Therefore PLURA SELF-ADHESIVE is insuperable in the waterproofing of wood structures, insulation panels which are heat sensitive, panel decks and refurbishment of historical roofs.
Furthermore PLURA SELF-ADHESIVE can be used and allows the waterproofing of particular roof details (ex. bandaging of plastic tubes, etc.) and the possibility to also apply with the traditional application method of open flame or hot air, obtaining an exceptional level of adhesion.
PLURA SELF-ADHESIVE guarantees a perfect level of adhesion to the application surface, providing the system with an excellent level of wind uplift resistance and allowing accidental infiltrations to be traced.
PLURA SELF-ADHESIVE with its innovative characteristics is indicated to waterproof a wide range of works, both civil and industrial.
PLURA SELF-ADHESIVE shows its peculiarity in those applications where it is not suggestible to use open flame, for example on heat sensitive insulation panels (polystyrene), wooden roofs, metal decks and for all under roof shingle applications.
PLURA SELF-ADHESIVE has a continuous single strand composite woven non woven polyester reinforcement with high mechanical characteristics.
The lower face of PLURA SELF-ADHESIVE is protected with a removable silicon release film. The upper face is self protected with mineral slates which also reduce the absorption of heat; furthermore a removable side selvedge of 10 cm is foreseen.
In the P version the upper face is protected with a polyethylene film; if requested with a polypropylene mat.
1. On cementious surfaces and similar apply, by roller or airless, synthetic primer PRIMER SINT, approx. consumption 200-400 g/m2. This application is not required on wooden roofs except OSB boards.
2. Position the PLURA SELF-ADHESIVE SBS on the application surface; provide side & head laps respectively of 10 & 15 cm’s between the sheets, making sure to remove the selvedge release film. (Draw. N.1)
3. R emove the release film from the lower face, this is divided longitudinally in two sections, in one or two steps, making sure to also remove the side selvedge of the upper surface. It is always suggested to mechanically fix head & side laps.(Draw. N.2)
4. U se suitable roller by applying pressure over all of the membrane surface, particularly the side & head laps to further promote adhesion.
5. Position suitable single or double battens for subsequent laying of the sealing element consisting of a discontinuous covering mantle (tiles, roof tiles, etc.) as required by the UNI 9460: 2008 standard – Discontinuous roofing for roofs. (Draw. N.3)
6. In the event of high internal relative humidity, or the presence of humidity in the wooden deck application surface, to prevent the formation of condensation on the inner face of the adhesive membrane during the night, which may cause marks or stains over time in the ceiling of the rooms below, foresee the use of MONOTEC vapor separation and diffusion layer having a polypropylene film finish mechanically fixed to the support with broad-headed nails. The adhesive membrane is then applied over the vapor diffusion layer. (Draw. N.4)
- The PLURA SELF-ADHESIVE SBS membranes are to be applied on dry clean surfaces which must be treated with a synthetic primer, excluded are wooden roofs except OSB boards.
- The side & head laps must be respectively of 10 & 15 cm’s.
- When applying on verticals, the apex of the membrane must be mechanically fixed with a proper flashing; where possible it is advisable to go up and over the vertical and on to the horizontal surface.
- Avoid storing the product on the roof with temperatures lower than +10°C or higher than +40°C if not for the time necessary for installation.
- With temperatures below +10°C it is necessary to apply the product using particular precautions:
- Store the rolls in an upright position in the original packaging, indoors and in dry and warm areas.
- Transport the rolls to the place of application only at the time of use.
- The ideal application occurs at temperatures above +10°C, however it is possible to apply the product below +5°C bringing the rolls to the ideal temperature with a leister or gas torch.
- The application surface must not have any depressions to avoid the risk of ponding water, the slope must be at least 1.5% on concrete decks and 3% for steel or wooden ones, this to guarantee a proper run off of rainwater.
- Program periodical roof inspections to remove debris, mud, plants, etc. and to keep under control the waterproofing as well as accessory details (drain outlets, TV antennas, air conditioning, etc.).
- In the eventuality in which the element to be waterproofed presents residual humidity (ex. refurbishment, application after heavy rains) it is necessary to foresee the use of air vents, which will be positioned in a way to allow for the evacuation of the humidity.
- Absolutely avoid the stacking of rolls and pallets for storage or transport to avoid possible deformations which may compromise a perfect installation. It is recommended to store the product at temperatures above 0°C.