Fixing Rails and Hammer Clips for Underfloor Heating

  • Discount Kit Pipe Fixing Rail
    Save 50%

    Pipe Fixing Rail

    £2.92 £1.46 £1.75 incl. VAT
    Per piece/1m
  • Discount Kit Plastic Nails for Pipe Fixing Rail
    Save 42%

    Nails for Pipe Fixing Rail

    £8.13 £4.71 £5.65 incl. VAT
    Per 100 pcs
  • Discount Kit Plastic Clips for Pipe Fixing Rail
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    Clips for Pipe Fixing Rail

    £7.46 £4.46 £5.35 incl. VAT
    Per 100 pcs
  • Discount Kit Plastic Hammer Clips
    Save 26%

    Plastic Hammer Clips

    £7.92 £5.83 £7.00 incl. VAT
    Per 100 pcs
  • Discount Kit Cement Screed Additive Floor Heating
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    Cement Screed Additive

    £7.92 £5.42 £6.50 incl. VAT
    Per litre
  • Discount Kit Wall Expansion Strips

    Wall Expansion Strips

    £12.50 £11.25 £13.50 incl. VAT
    25m x 10cm / 5mm


Floor heating pipes can directly be fixed on the subfloor by means of a rail system or plastic hammer clips. This is most commonly done when new screed is poured (such as in new constructions or renovations).
Depending on the available installation height, the rail system can also be used to mount heating pipes on insulation.


Adhesive flooring screed

When making use of this way of installing underfloor heating, the pipes are mounted by means of the rail system or hammer clips without additional insulation or reflective foil. Screed will therefore be poured on the (existing) structural subfloor, creating adhesive flooring screed.

Floating flooring screed

Before the fixing rails are put in place, (Tacker) insulation is laid over the entire floor. The fixing rail on which the heating pipes will be mounted is placed on top of insulation by means of plastic clips. This method of installation creates a floating screed which will allow the floor to expand and shrink independantly from the structural subfloor.
In order to minimise unwanted heat loss and allow for expansion, it is important to ensure that the floor screed does not form a bridge to either external or internal walls. Therefore, edge insulation must be placed against all walls.


plastic hammer clip

Plastic Hammer Clips
Pre-drill 28 mm with a 6mm drill and then fix with a hammer
Suitable for pipes with a diameter of 14mm to 16mm
Required number of clips: approximately 3 per meter



pipe fixing rail

Penta Rail System
Supplied per meter (5 x 20mm rail strips)
Can manually be extended or shortened
Can be used for mounting on the structural floor (by means of nails)
or onto insulation (by means of staples)


Floor Construction (when creating floating screed)

  1. Subfloor (structural floor)
  2. Insulation (Tacker insulation plates for example)
  3. Edge insulation
  4. Grid foil or reflection foil
  5. Penta rail
  6. Floor Heating Pipe
  7. Approximately 7cm to 10cm screed
  8. Floor finish
screed on fixing rail