Always a good basis for your decking - how to lay the deck boards and joists properly


The foundations are the starting point for your deck installation. When installing UPM ProFi composite decking you can choose for your subconstruction either composite or aluminium support rail, our patented click system or traditional structural grade, timber joists. Each material has its own specific rules: by following our installation instructions closely the end result will be the best possible.

The following tools are recommended for building the deck: a circular saw, a power screw driver, a drill bit, a rubber mallet, a spirit level, a tape measure and an infrared thermometer. UPM ProFi decking products can be machined using typical woodworking tools. Always follow local building regulations and safety codes as well as generally accepted codes for practice. It is important to follow the UPM ProFi installation instructions carefully.

If you are planning to build a larger deck and need project assistance and expertise in laying deck boards, please contact us.

Normally we do not recommend building the deck yourself but if you decide to do it yourself, please take careful look at the installation guide.




After completing your framework, the next steps to lay your decking include fastening the deck boards, edging the terrace or using other accessories . We have some top tips for laying your composite decking. We hope you find our guide useful and learn how to build a long-lasting, low-maintenance WPC deck!



Check our videos how to install decking, joists either from aluminium, composite or timber!


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