Wrimco SBS waterproof membrane being torch applied to unusually complex retaining walls with several projections and height steps. The operator is unrolling the Wrimco SBS upwards as he torches the surface so the "hot melt" then adheres the 3mm sheet to the blockwork wall.
The retaining walls waterproofed with Wrimco SBS membrane since the base was well below the water table, the Wrimco SBS was first laid on the blinding slab. After the main concrete base slab was poured, the membrane was subsequently wrapped around the sides and brought across to the walls in order to totally encapsulate or "tank"
the basement. The depth of the excavation can be gauged by the fencing which is at road level facing the ocean beach.
Architect: Sam Crawford
Builder: Gunlake Constructions
Photos showing a foundation wall well below the water table with Wrimco SBS being torch applied to shotcreted walls and blinding slab prior to pouring the main floor slab and forming the walls so the membrane ends up sandwiched between the two
Architech: Neeson Mercutt Architects
Pactiv PB4 spot torched onto Wrimco SBS waterproofing membrane, fully bonded to retaining wall. The PB4 is particularly easy to apply to sloped walls such as this. There is no need for drainage cells with this well-proven system
Wrimco SBS membrane torch applied to a 1.2m high retaining wall protecting the front of the building. PB4 dedicated protection board will be subsequently spot torched to the Wrimco SBS.
Sunrise Rd, Palm Beach
Marcus Hercum Design Practice
Wrimco SBS Sanded membrane that was spot torched to a blinding slab with the base of a water storage tank now laid on top. Once the blockwork walls are built, the surplus elastomeric 3mm membrane will be torched onto the wall and membrane will be subsequently applied to the dirt line.
The reason for choosing the Wrimco SBS sanded membrane was for the concrete slab to adhere to the membrane. It is the upsidedown equivalent of a roof where we need the membrane to stick to the roof slab to prevent any water tracking.
Waterproof Retainging Wall
Architect: Edward Szewczyk
Photo showing Wrimco SBS torch applied to a blockwork retaining wall, prior to spot torching PB4 protection board.If the waterproofing membrane had to go above the group of conduits shown, the rigid PVC pipes are too close together for sealing with Wrimco PB4 easily but an experienced torch hand would be able to do so. It is always preferable to use the one product to avoid weak spots from using different materials. Fortunately the low melting temperature of the Wrimco SBS 110-120C makes it possible to detail practically anything provided it is accessible. Pipes hard against a wall should be avoided as it is then difficult to seal the cusp.