Advanced installation guidelines for building WPC roof terrace

UPM ProFi Deck 150 Stone Grey, Helsinki, Finland


In general, fixation of support rails to the roof surface is not possible and differences in height need to be compensated. Therefore a rigid framework with cross-members made of Alu Support Rail Large in combination with UPM ProFi UPM ProFi Foot and/or Rubber Pad needs to be created. The maximum distance of cross-members must not exceed 2 m (centre to centre).

Other options: rigid framework constructed from timber or UPM ProFi Support Rails. The joists must be connected to each other with L brackets for example.



A. > 2 cm towards walls or other fixed surfaces. (>3 cm if installed with Alu rail and/or rubber strip)

B. Max. 40 cm (for details see Installation instructions Part 2: text chapter 3.7)



If building height is limited, UPM ProFi Support Rail Small can be used and interconnected as well.

Please note that UPM ProFi Support Rails must only be installed on hard flat surfaces. Any raised deck must be built on UPM ProFi Alu Support Rail Large or timber frame (hardwood , durability class 1).

Additional weighting can be positioned if necessary: Attach the substructure onto concrete slabs or at limited building height fix metal sheets on the support rails and place concrete slabs on it.


  1. UPM ProFi Deck
  2. UPM ProFi Support Rails fixed on concrete slabs and connected to a frame
  3. Concrete slabs: ≥ 20 cm x 20 cm x 3 cm, distance < 20 cm
  4. Compression proof insulation, sufficient drainage
  5. Lining
  6. e.g. 20 cm reinforced concrete floor


Please always note particular local conditions and ensure that you meet the requirements of the local building regulations.

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