Uponor Siccus dry system - lightweight and fast for multiple applications

Uponor Siccus underfloor heating system is a flexible solution that is characterised by its low construction height and its low weight. The system is suitable for new constructions as well as for modernising old buildings. It is quick and clean to fit, and can be walked on immediately after installation.  

Uponor Siccus comprises just four components; mounting sheet, heat conducting plate, heating pipe and PE foil. It is a light weight system, including the floor load distribution sheet. This is a real engineering bonus. The low-mass floor construction allows for fast response temperature controls. The mounting sheet is flexible to use, easy to cut and pre-fitted with channels in the “header area” for Uponor PEX a pipes and Uponor multilayer pipes.

Application areas:

  • Radiant underfloor heating and cooling
  • Dry installation
  • New builds and renovation


Siccus 12mm
  • Minimum construction height: 25mm with laminate
  • Pipe and dimension: Uponor Comfort Pipe 12 x 1.7 mm
  • Maximum heating performance: 50 W/m2
  • Weight: 18 kg/m2 with parquet

Siccus 14mm
  • Minimum construction height: 50mm
  • Pipe and dimension: Uponor Comfort Pipe PLUS 14 x 2.0 mm and Uponor Comfort Pipe 14 x 2.0 mm and Uponor MLCP RED pipe 14 x 1.6 mm
  • Maximum heating performance: 90W/m2 with gypsum panel and tiles
  • Weight: 25kg/m2 with gypsum panel 25mm

Siccus 20mm
  • Minimum construction height: 52mm with 22mm parquet
  • Pipe and dimension: Uponor Comfort Pipe PLUS 20 x 2.0 mm
  • Maximum heating performance: 85W/m2
  • Weight: 23kg/m2 with 22mm parquet

Siccus FX
  • Minimum construction height: 43mm with 13mm parquet / 50mm with gypsum panel
  • Pipe and dimension: Uponor comfort Pipe PLUS 16 x 2.0 mm and Uponor MLCP RED pipe 16 x 2.0 mm
  • Maximum heating performance: 75W with 25mm gypsum panel
  • Weight: 24kg/m2 with gypsum panel 25mm


Uponor siccus installation video

  • Step by step installation of a siccus underfloor heating system
  • Installation of all components such as EPS insulation, aluminium heat spreaders and pipes on top

Benefits of the Uponor Siccus system

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Laying on existing floors

  • Time saved due to quick installation
  • Fast response temperature control
  • The system is optimally suitable for energy related retrofitting

Proposal of construction with Siccus systems

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Product components - underfloor heating panel 12 mm

  • Heating loops mounted in Siccus 12 floor heating panels for 12 mm pipes
  • The floor heating panels come prefabricated with fixed heat spreaders
  • The floor heating panels have ready-made grooves for mounting Uponor Comfort Pipe pipes 12 x 1.7 mm with 125 mm c-c between the pipes
  • This construction is already prepared for additional construction to install the finished floor
Ideal structure
  1. Parquet flooring min 7 mm
  2. Possible vapor barrier (follow floor manufacturer's instructions)
  3. Underfloor heating pipes
  4. Floor heating disc 15 mm (polystyrene) with adhesive floor heating plates
  5. Existing floor

Discover more on Siccus underfloor heating in our brochures

Select other Uponor underfloor heating and cooling dry-build installation system to suit your individual requirements

Underfloor heating systems in residential and commercial buildings which mainly require heating are often the first choice. And since the requirements for the design and function of an underfloor heating can differ very much, Uponor offers tailor-made solutions not only for new buildings, but also for renovation. To increase comfort, these systems can also be used to cool rooms.