UNDERFLOOR HEATING GUIDE AND INSTALL PART 1 - Plumbing Tips



How to Install Wet Underfloor Heating

Two Methods:

Wet (or water) underfloor heating works by circulating warm water through a series of continuous loops that are fitted underneath your floor. This creates a large radiant surface that heats your room from the floor upwards. This radiant form of heating is much more comfortable than the convective heat provided by radiators which draws cold air across the floor, heating it and then convecting it upwards towards the ceiling.

Steps

For Joisted Floors and Most Timber Floors with Joists or Battens

  1. Refer to the design plan drawings.Prepare to lay the floor in accordance with the layout described.
  2. Lay the insulation between battens/joists followed by the grooved diffuser plate.Check the system plans for the number and length of each loop required.
  3. Starting on the left side of the manifold, connect to the manifold flow bar.
  4. Make a note of which zone the loop serves on the manifold tag supplied.
  5. Lay the pipe out, navigating the most efficient route between the manifold and the zone.Pipes will need to be notched into the batten/joist when they loop from one joist void to another
  6. Secure aluminium diffuser plate to the batten/joist.Lay pipe into the pre-grooved aluminium diffuser plates, as per the system designs.
  7. Use pipe clips to secure the tail pipework as it crosses the batten/joist
  8. Complete of the loop.Follow the same route back to the manifold and connect to the return bar (bottom bar with blue caps), making a clear note of the actual loop length installed on the manifold tag.
  9. Follow the same procedure for all loops until the area is evenly covered with pipe, following your pipe layout design.
  10. Test.Once all loops are installed and connected to the manifold, pressure test the system.
  11. Lay final floor finish after the system has been successfully pressure tested.

For Screeded Floor Buildup

  1. Set up pipe decoiler and all necessary tool.Make sure working area is clear and clean.
  2. Lay the damp proof membrane over entire floor area, overlapping at least 150mm up walls and where dpm sheets meet.
  3. Roll out border edge insulation and lay floor insulation.This will help to hold the border edge in place until screeding. If the floor insulation is already in place, border edging can be stapled to the edges of the floor insulation using cliprail clips or a staple gun to fix to the wall. If required, lay polythene sheets across screeded area overlapping at least 150mm up walls and where sheets meet.
  4. Lay cliprail lengths at 1m-1.2m intervals and as detailed on pipe layout instructions.Use the cliprail clips to secure the cliprail to the insulation (two or three clips per rail).
  5. Lay the cliprail lengths at approximately one metre intervals and at right angles to the direction the pipe is to be laid.
  6. Check the system plans to see the number and length of each loop required.
  7. Starting on one side of the manifold, connect to the manifold flow bar.Make a note of which zone the loop serves on the manifold tag supplied.
  8. Lay the pipe out, navigating the most efficient route between the manifold and the zone.Start laying the pipe into the cliprail, as per the system designs.
    • Individual cliprail clips can be used to hold the pipe to the insulation in between the cliprails and on tight bends.
  9. Complete the loop.Follow the same route back to the manifold and connect to the return bar (bottom bar with blue caps), making a clear note of the actual loop length installed on the manifold tag.
  10. Follow the same procedure for all loops until the area is evenly covered with pipe.
  11. Screed the floor once the installation of pipework is complete and the system has been pressure tested.





Video: ProWarm™ Warm water underfloor heating kit installation - Levelling compound to solid floor panel

How to Install Wet Underfloor Heating
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Date: 19.12.2018, 14:33 / Views: 71345