Category: How to tile on walls

Shower tray installation

Required products

Required tools

  • Tape measure
  • Pencil
  • Spirit level
  • Notched tiling trowel
  • Hand saw
  • Circular saw
  • Screwdriver
  • Sweeping brush
  • Solvent weld
  • Spatula

Installing a shower tray

This step-by-step guide has been created as a technical guide to aid you through the correct installation of your Norcros Pro Board Shower Tray.

This guide provides you with information regarding the tools and essential components required for each stage of the installation process.

The Norcros Pro Board Shower Tray can be installed into many different types of subfloor structures. However, the installation demonstrated in this guide is typical of a timber floor installation.

Let’s begin.

Stage 1:

  1. Clear the working area.
  2. The floor area should be clear of all debris before installation starts.

Stage 2:

  1. Place the Norcros Pro Board Shower Tray onto the floor in the area where it’s to be fixed.
  2. Mark out the position of the waste using the drain opening of the tray as a guide, and check that the position of the drain doesn’t conflict with the joists below the floorboards.
  3. The joist location is easily identified by noting the screws fixed through the floorboards.
  4. To alter the drain position, the tray can be trimmed along its edges, allowing the tray to be moved.
  5. Trimming the tray by a maximum of 55mm will clear the drains of the obstructing joist.
  6. With the drain clear of any obstructing joist, the tray and drain position can be marked.
  7. When setting out the position of the shower tray, its important to mark out snd remove the floorboards back to the centre of the nearest joist, even if the nearest joist extends past the edge of the tray.

Stage 3:

  1. Once the shower tray position has been marked out, the floorboards cab be removed.
  2. Cut through the floorboards following the markings on the on the floor using a circular saw.
  3. Make sure to set the saw blade to the correct depth so as not to damage the supporting joists or any pipe work or electrical cables that maybe concealed under the floorboards.

Stage 4 & 5:

  1. Now, prepare a platform to support the Norcros drain fitting aid and drain body.
  2. Firstly, identify the correct position of the drain, then, construct the supporting platform between the joists.
  3. Securely fasten 50 x 25mm timber battens to the adjacent floor joists, and fix 80mm marine plywood top.
  4. If your joist centres are greater than 400mm then you must use 22mm ply throughout your shower tray installation.
  5. The finished height of the supporting platform, therefore, must be set 85mm below the top surface of the floor joists.

Stage 6:

  1. With Norcros drain fitting aid now located on its support platform, insert the drain body and attach the main rubber seal.
  2. Check that the drain aperture in the shower tray aligns correctly with the fully supported drain body.
  3. At this stage, take care when checking the drain alignment.
  4. Remember that the shower tray is not yet supported between the joists.
  5. If the drain does not align correctly, the drain fitting can be trimmed with a handsaw to accommodate any final adjustments.
  6. With the drain and shower tray correctly aligned, the waste pipe can be fitted.
  7. Remember that the drain body is available with different waste outlet positions: a horizontal waste outlet and also a vertical waste outlet.
  8. You’ll need to consider the drain outlet position that best suits your particular requirement.
  9. The following example demonstrates a typical installation using a drain body with a horizontal outlet.
  10. Using one-and-a-half inch ABS solvent weld waste pipe, fix the waste pipe into the drain body.
  11. Its important to test the waste pipe route at this stage to ensure that all joints are watertight as it may be difficult to return this assembly later.
  12. Make sure that the waste pipe route has sufficient falls of 1 in 6 to allow the waste water to flow correctly.

Stage 7:

  1. It’s essential that the floor area where the tray is to be fitted is structurally sound.
  2. The Norcros Pro Board Shower Tray is not designed to span across joists and, therefore, it’s very important that the entire base of the of the shower tray is completely supported by a structurally stable surface.
  3. You’ll now need to construct a robust level platform or fully support the shower tray.

Stage 8:

  1. During the preparation of the floor areas, it may have been necessary to remove excess floorboards to get back to the nearest joist centre. If this is the case, you’ll be left with a void between the shower tray and the existing floorboards.
  2. The void can be backfilled using floorboards or marine plywood.

Stage 9:

  1. At this stage, it’s important to check again the alignment of the drain body with the position in the shower tray and adjust if necessary.
  2. The shower tray should now fit onto the newly created platform but should fit slightly proud of the remaining floor area.
  3. Depending on the thickness of the shower tray used, the height difference between the shower tray and the surrounding floorboards can vary.
  4. This difference will be made level at a later stage by fixing Norcros Pro Boards over the surrounding floor area.

Stage 10:

  1. With the floor now fully prepared and all checks carried out to ensure that the shower aligns correctly with the drain, the shower tray can be fixed.
  2. The shower tray is permantly fixed in place using Norcros Rapid Porcelain Tile Adhesive.
  3. Mix the adhesive according to the instructions on the packaging.
  4. Apply a solid bed of adhesive to the area where the shower tray is to be placed using a suitable thick bed notched trowel.
  5. The adhesive bed should be a minimum of 3mm thick, but could be thicker in localised areas if there are any low spots.
  6. When applying the adhesive, it’s important to leave 10mm gap between the adhesive and the main rubber seal of the drain body.
  7. Should the adhesive come into contact with the rubber seal, remove the seal immediately and clean throughly with water before continuing,
  8. The adhesive should also be used to backfill the small cutout in the drain fitting aid.

Stage 11:

  1. Bed the tray into the adhesive.
  2. If necessary, appky moderate hand pressure making sure there are no hollow spots beneath the tray.
  3. Using a spirit level, make sure the shower tray is perfectly flat and level around the perimeter.
  4. If the tray is set out of level, water will not flow to the drain outlet correctly.
  5. Using the securing tool that is supplied with the drain, thread the waste assembly into the the drain body through the shower tray.
  6. It’s important to fully tighten this assembly; apply moderate force to ensure a good tight fit seal is achieved.

Stage 12:

  1. Now that the shower tray is fitted, the surrounding floor area can now be overlaid usinf Norcros Pro Board.
  2. Nocros Pro Board is available in a range of thicknesses. However, 6 or 10mm board is usually sufficient to level the floor to the tray.
  3. Depending on the floor structure and height buildup required, the Norcros Pro Board can be fixed using two different methods.
  4. Fixing method one:
  5. Use a bed of Norcros Rapid Porcelain Tile Adhesive to fix the Norcros Pro Board to the floorboard.
  6. This method is the most commonly used.
  7. Fixing method two:
  8. This a dry fixing procedure.
  9. Use Norcros Pro Board 35mm diameter metal fixing washers to secure the boards to the floorboards.
  10. If using fixing method one to fix the Norcros Pro Boards, mix Norcros Rapid Porcelain Tile Adhesive following the instructions on the packaging. Note that the existing floorboards will need to be primed with Norcros Prime Bond, diluted as per manufacturer’s instructions.
  11. Apply a solid bed of adhesive using a suitable thick bed notched trowel.
  12. This adhesive bed should be a minium of 3mm thick but could be thicker in localised areas if there are any low spots.
  13. Lay the Norcros Pro Board in position and form down into the adhesive bed.
  14. The board should be laid in a a brickbond fashion to stagger joints and checked to ensure that the boards are level.
  15. Allow the adhesive to set for at least three hours before proceeding with the next step in this process.
  16. If using dry fixings to secure the Norcros Pro Boards to the floorboards, you’ll need to use Norcros Pro Board fixing washers.
  17. The mechanical fixings should be positioned at a minimum 300mm centres using a minimum 12 fixings per boards.

Stage 13: Waterproofing and joint bridging:

  1. Norcros Pro Boards and Norcros Pro Board Shower Trays are waterproof elements manufactured ready to receive the application of tiles and do not require additional surface preparations.
  2. It’s essential, however, that all joints in areas subject to moisture and water ingress must be bridged with a suitable waterproofing system prior to tiling.
  3. Norcros Pro Board Butyl Waterproofing Tape is an ideal waterproofing and joint bridging system. designed for use with the Norcros Pro Boards and Norcros Pro Board Shower Trays and when installed correctly will provide a watertight system perfectly suited for wet room environments.
  4. First, prepare the surface by removing any dust or debris.
  5. With the surface clean and dry, start by fixing Nocros Pro Board Butyl Waterproofing Tape, bridging all joints.
  6. Measure and cut the tape to the required length, allowing the tape to overlap any adjacent tape by a minimum 50mm.
  7. Peel the easy release paper from the back of the tape and lay the tape.
  8. Using a flat trowel, apply an even pressure to flatten out the tape, ensuring that the tape is in full contact with the surface of the shower tray and boards, and that there are no hollow spots left behind the tape.
  9. The tape should bridge all floor and wall joints that could become exposed to water during use.
  10. With all the straight section with tape fitted and all joints covered, the prefabricated corner tape can be then fixed. It must be laid into a 2mm bed of Norcros Rapid Porcelain Tile Adhesive.
  11. Ensure that the corner tape is in full contact with the adhesive and there are no hollow spots left behind the tape.
  12. Use a flat trowel to flatten out the tape surface, making sure that all joints have been correctly sealed with the tape.

Stage 14:

  1. We recommend replacing any plaster board on the walls of your proposed wet room with Norcros Pro Board 1000 to give a complete waterproof solution.
  2. Remember to bridge all floor and wall joints that are exposed to water with Norcros Pro Board Butyl Waterproofing Tape.

Stage 15:

  1. With all joints bridged and sealed, you can now sort the tiling of your new wet room.
  2. The Norcros Pro Board Shower Tray is manufactured with a factory fitted frame which holds the stainless steel grate cover in place and is designed for tiles up to 7mm thick with a 3mm adhesive bed.
  3. If your tiles are thicker than 7mm, you may need to increase the height of the plastic frame. This done by fitting the 6mm plastic frame extension raising frame supplied with the tray.
  4. The extension frame is the designed to sit directly onto the factory fitted plastic frame and is secured using silicone or solvent weld.
  5. It’s important to make sure that your tiles finish flush wit the extension frame if its used.
  6. Next, fix the tiles using Norcros Rapid Porcelain Tile Adhesive.
  7. If you are using large format tiles, we recommend you start by laying the tiles, respecting the inbuilt falls in the shower tray by working from the corners of the drain to the corners of the tray.
  8. Consideration must be given when choosing tiles.
  9. For wheelchair access, tiles with a surface area no smaller than 150 x 150mm should be used.
  10. For bare foot traffic, tiles should be no smaller than 50 x 50mm mosaics.

Stage 16:

  1. Complete the tiling of the room and grout the tile joints.
  2. Grputing should be carried out using Nocros 4 into 1 Wall and Floor Tile Grout.
  3. With the tile and grout incomplete, you can now remove the securing tool and insert the rest of the the drain components, following the instructions provided with the drain.
  4. Take care when installing shower screens and shower hardware, which will be required to complete your wet room area.

Stage 17:

Your wet room is now ready to use.