Building the deck starts with carefully constructed foundations. A durable, safe, and properly built deck will bring joy for a long time. Check out our checklist for proper deck construction.

The first, and arguably the most important thing is the foundation of the deck. The style and method of the foundation are determined by the soil. A simple pillar foundation is the easiest and most effortless solution if the ground is frost-free. If the ground is frost-prone, seek advice from a professional for foundation construction.

At this stage, it is also good to ensure sufficient height so that the deck ventilates effectively and no vegetation forms there. If the deck is placed on top of the lawn, the topsoil must be removed, a filter fabric laid underneath, and a layer of gravel placed on top.

Stone slabs on sand as deck foundation

Stone slabs are well suited for foundations on frost-free soil.

 

Frame

We recommend using only stainless or acid-resistant steel screws and fasteners in the frame. Choose sufficiently sturdy material for the frame such as 48×98 Frame Plank. Carefully check the diagonal measurement and frame height either with a laser meter or a level. Also consider walking directions and possible stairs at this stage.

Joist spacing usually varies between 400-700mm. The joist spacing is determined by the deck board material and its dimensions. 600mm spacing is a common choice for 28mm thick boards.

Deck steps built from Pauha deck boards

Deck

There are many good material options for terrace decking. Once a preferred product that best serves your use is chosen, installation can begin. It is recommended to start installing the deck boards from the front edge. The result is neater and the work easier if the board is the full length of the terrace. We recommend leaving a 5mm gap between boards. If the board is wet, use a smaller gap, as wood shrinks when drying.

Almost finished gray Ulkokalla composite deckWood composite installation is done with hidden fasteners.

 Close-up of a gray Ulkokalla composite deck

Other considerations

  • Schedule and budget
  • Get building permit matters checked at the building supervision
  • Board direction: do you want to emphasize width or length?
  • Board width: Wider boards give a massive feel and narrower ones a more subdued look
  • Supplies: Deck boards, frame planks, screws, foundation materials
  • Tools: Cordless drill, saw/circular saw

 

A boy hands an adult a sausage from a barbecue grill on the deck

Maintenance-free and shape-retaining wood composite deck board is an easy choice when you want durability and ease from your deck.

Explore all our deck products from this link!