Advanced installation guidelines for composite stairs

UPM ProFi Deck 150 Silver Green, Click System, Restaurant, France

Please note: These guidelines can only be used as additional information to the UPM ProFi installation instructions Part 1 and 2.

Building stairs with UPM ProFi Rail Step

Support Rails to be attached on flat surface, like concrete stairs.

Decking boards must be installed with UPM ProFi Alu Rail (instead of T-Clips) for more stability.

If the existing construction cannot be changed to match the dimensions of UPM ProFi profiles, best is to use UPM ProFi Rail Step at the front stair edge and UPM ProFi Deck boards in the internal corners. If needed, the deck boards can be cut lengthwise to fit the dimensions of the stairs.


Please ensure that you meet the requirements of the local building regulations. 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 on a timber frame. UPM ProFi Deck boards must not be used above ground floor applications, unless built on a solid load bearing surface: e.g. concrete steps.

UPM ProFi Piazza One Californian Oak, villa, Tampere, Finland

Building stairs out of UPM ProFi Piazza One.

To build stairs using Piazza One, there are two options.


Option One

The easiest way to cover stairs using Piazza One is to install deck boards vertically under horizontal boards and use the Cover Strip to cover the edges, as shown.

Option Two

Another way to build stair using Piazza One is to cut off the bottom tongue on one side of two boards and install them as shown.


In both cases the Alu Rail must be used instead of Clips to fix the boards to the substructure.