Before fixing the membrane along the bridge, using special metal plugs, it is advisable to eliminate any irregularities in the fixing surface, removing any inconsistent or protruding parts and filling any cavities with suitable mortars.
The edges of the membrane will be protected from water entry by means of a special stainless-steel flashing, also fixed to the ballast walls using metal plugs.
The joints must be made along the watershed lines of the membrane laying surfaces, so that the water always tends to move away from them.
At the valley points, before installing the membrane, it is necessary to arrange the water collection wells, which will thus be located under special holes in the membrane through which the water will be intercepted.
The system is completed with the installation of a drainage pipe for the water collected from the well which extends with an adequate slope to the nearest outlet (guard ditch, watercourse, etc.).
All joints between the well and the pipes must be made with electro-welded connection sleeves, to achieve perfect sealing of the entire system.
