Wet Screed Panels

The wet screed panel system is a castellated sheet covering 1m² each, sheets are laid over the sub floor, thermally insulated in accordance with building regulations and interlocked to form a continuous layer. Wet Screed Panels are useful where there is a restricted floor depth, once the 16mm Pert-Al-Pert pipe has been installed, the system will be ready for the specified screed to be laid.



  • Used for controlling normally closed switch of small valves or PDM
  • Executive control on-off and stable control of closed loop valve
  • Mounted on the pipeline of the water collector loop and the thermostatic valve
  • The valve is closed when the electric actuator has a power failure
  • The paraffin propeller is driven by heating PTC
  • Spring-return function, the valve closed with power failure
  • No noise during operation
  • Indicate the stroke location and the opening
  • Simple and fast installation of the nuts connecting, easy to disassemble

Specification & Technical Details


16mm Pert-Al-Pert

Pipe Centres

150mm, 200mm & 250mm

Panel Thickness



1kg/m² + Screed


Hetta recommends sand/cement screed of 65/75mm thick, or a 50mm liquid screed (Dependant on screed supplier)

Heating Outputs

Heating outputs depend on the thickness of the screed, pipe centres, flow rates and floor finish.

Panel Dimensions
1200 x 820 x 20mm (1m²)