Underfloor heating within a screed

Clip-Rail

Clip-Rail Underfloor Heating System

Clip-Rail underfloor heating which is laid within a screed offers fast installation and provides multiple fixings across the floor space. Clip rail is supplied in one-meter lengths with barbed staples attached and interlocking fixings so you can join multiple clip rails together. The pipe can be spaced as little as 50mm apart with 16-20mm pipe accepted within the clips.

We can provide staples along with this system for bends and any areas that aren’t suitable for clip-rails.

It is best practice to lay a minimum 500 gauge polythene sheet over the insulation prior to laying the pipe down. The polythene sheet should be overlapped by a minimum 80mm and taped at each joint.

Clip-Rail is also available with self-adhesive backing. They also come in 1-meter lengths.

Clip-rail for 16mm pipe
16mm PE-RT pipe secured into Clip-Rail laid within 70mm screed

Clip-Rail Underfloor Heating Project Suitability

  • New builds and extensions
  • Good for large regular shaped rooms
  • Over solid concrete or block and beam subfloors
  • Where height build-up is not an issue

Clip-Rail Underfloor Heating Features & Benefits

  • (W X L X D) 1450mm X 800mm X 21mm
  • Suitable for 16-20mm pipework
  • Easy one-man-installation
  • Can be used with traditional and liquid screeds
  • Provides readymade pipe spacings
  • Quick & simple install
  • Outputs of over 100w/m2

Floor Coverings

wood and laminates

Wood Flooring​

Wood and laminate flooring can be laid directly on to the screed systems, along with an underfloor heating suitable underlay. You should always consult the flooring manufacturer to ensure the wood floor is suitable with underfloor heating. The wood floor should not exceed 27°C

tiles

Tile Flooring​

Tiles can be laid directly on to screed using a flexible tile adhesive. We strongly advise the use of a decoupling membrane, this will help prevent cracks and also provide a separation layer should you want to change the tiles in the future.

LVT and Vinyl

LVT/Vinyl Flooring​

LVT / Vinyl need to have a flat surface to lay on. It is recommended to speak directly with the manufacturer to ascertain any pre-existing requirements prior to installing LVT or Vinyl. The vinyl floor should not exceed 27°C.

carpet

Carpet Flooring​

Carpet floors require a flat surface to lay to and a underfloor heating suitable underlay should be used to avoid restricting the heat from passing through into the the space above

The Clip-Rail is suitable to install in the following patterns

underfloor heating circuit pattern serpentine
underfloor heating circuit pattern bi-flow meander black and orange
underfloor heating circuit pattern spiral
Mean Water Temp Room Temp Tiled Floors Wood Floors Carpet Floors

(˚C)

150 CC W/m²
200 CC W/m²
150 CC W/m²
200 CC W/m²
150 CC W/m²
200 CC W/m²
30
20
55.5
47.9
41.2
36.3
33.0
30
35
20
84.3
72.7
62.5
55.1
50.1
45.5
40
20
112.8
97.3
83.7
73.8
67.1
61.0
45
20
141.3
121.9
104.8
92.5
84.1
76.4
50
20
169.7
146.4
125.9
111.1
101.0
91.7

Other Screed System Options...

Clip-Plate

Faster than staples, no need for the polythene sheet over the insulation.

Staple​​

Cost-effective and easy to install