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The wedi Fundo Primo Shower System features a square drain cover point drainage solution for fast and safe renovation and new construction installations. Primo is internally waterproof due to its wedi XPS foam's closed cell structure and naturally protect against mold or mildew like every wedi XPS foam based product. It is fast and clean to cut to fit custom designs while the level of prefabrication reduces installation time significantly. The shower floor units feature a strong and pre-sloped surface which can be tiled over immediately whether you choose mosaic size or large format tile. Drain unit and drain cover set is always included with each Primo shower floor unit while further optional drain cover designs are available. Pre-sloped extension boards are available so that virtually no limit exists for making any size or shape for custom shower designs happen. The added values offered by Fundo Primo come in form of many more performance advantages. Naturally, Fundo Primo is insulating keeping surfaces warmer. Especially when compared to traditional mortar bed installations or other currently known methods for building showers such as those including use of sheet – or liquid waterproofing membranes used in an attempt to manage water exposure – wedi Fundo Primo's simplicity and high performance shows. The installation combines many manual and separate installation steps and materials usually needed into very few. Fundo Primo adds speed, safety and consistency to your installation: Measure, possibly cut, thinset to subfloor, connect drain – done. The most unique advantage, however, is the complete and natural core waterproofness of the wedi product and it’s completeness and range of components that will form an entire assembly system with Fundo Primo engineered to fit and last. A true system with full warranty coverage.
Cut the DN 50 floor waste pipe at least 40 mm below the top of the floor surface. Make sure that the cut out fits to the Fundo panel drain. Cut out a 130 mm diameter hole around the DN 50 pipe to allow the wedi drain to be inserted into the subfloor while the cut out area must remain free of deflection.
Glue the Adapter to the DN50 Pipe so that the Adapter is sticking out of the subfloor.
Cut the Adapter flush to the floor construction. Make sure that the cut out fits to the Fundo panel drain.
Assemble the drain unit following the instruction drawing.
Set up a continuous 5 mm bead of wedi Joint Sealant along the channel in wedi Fundo‘s drain flange receptor.
Drop the drain body firmly into the sealant.
Turn the Fundo base upside down and apply the rubber and the fiber gasket. Tighten the gaskets firmly to the bases‘ steel ring using the locking nut. Make sure the drain body is still safely received in the valve-bead of sealant.
Trowel the thinset and comb through with a 10 × 10 mm notched trowel. Channels pointing to the entrance.
Press the Fundo firmly into the thinset bed, ensuring that the installation is level and void free. Apply some weight equally and leave on surface and drain area to allow the thinset to initially cure without being disturbed (e.g. thinset bags).
Set up the rubber caulking gasket (with the bevelled side up) around the 50 mm pipe in the subfloor. The rubber gasket must be flush with the upper end of the 50 mm ABS or PVC pipe. Do Not use any Lubricants.
Tighten (squeeze) the rubber caulking gasket firmly with the caulking nut (use a flat headed screwdriver) and finally insert the plastic frame and strainer on top (without adhesive). The frame and strainer will be held in a grout joint only once tiling commences.
Set up a continuous 10 mm bead of wedi Joint Sealant along the pans channel on the outer perimeter and only in areas where you can immediately install a Building Board into the fresh sealant.
Push the wedi board all the way into the channel of the shower base channel and its bead of sealant. Smooth out any pushed out sealant on inside seam using a putty knife. Fasten the boards directly to the studs starting 300 mm above the base and at a rate of 1 fastener per 300 mm. One extra fastener is set into the seam to the next board to create a flush transition.
Apply continuous 10 mm beads of sealant between all connections of boards and install with thigthly butted seams. Excess sealant must be spread flat with a putty knife. All seams and fastener heads in the assembly are covered with a secondary 10 mm bead of sealant and spread flat. The seams should be covered 25 mm on either side of seam. All fastener/washers are covered with sealant stretching 25 mm over the washer edges.
wedi Niches are installed in a cut out in the wedi wall and attached with it‘s flange right into the center of 450 mm studs. wedi Joint Sealant is set along the connection of wall to niche.
2 Fasteners each side of the niche are set to create a flush transition to the wall boards. Another 10 mm bead of wedi Joint Sealant is spread over fasteners and seams.
A continuous 10 mm bead of sealant is set into the channel and along the vertical hob notch part. A circle of 10 mm sealant bead is set against the wall boards where the hob attaches. A 10 × 10 mm notch trowel bed of thinnset mortar is applied to the subfloor and a skim coat on the bottom surface of the hob as a best practice. The tightly fitting hob is pressed into the connection area.
Weight is applied on and against the hob (from outside) and another 10 mm bead of sealant is applied over all hob seams and spread flat. The seams must be covered 25 mm either side of a seam.
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