Substructure

The best substructure for a deck depends on the choice of decking and the local conditions. Substructures made of aluminum or hardwoods such as Cumaru or Garapa are particularly durable. They offer high stability, are weather-resistant, and ensure a long service life for the entire deck.

We recommend using spacers or rubber granulate pads between decking boards and the substructure. These provide better ventilation, prevent waterlogging, and reduce friction. This increases the durability of the deck and ensures the substructure remains stable.

The thickness of the substructure depends on the load and the choice of material. As a rule, the support timbers or aluminum profiles should have a height of at least 40–60 mm. For larger spans or high loads, greater dimensions may be necessary to ensure the necessary stability.

A robust and durable substructure is crucial for wooden floorboards. Hardwoods such as Cumaru or Garapa are ideal, as they offer high resistance to moisture and pests. Aluminum is also a very good alternative, as it is completely dimensionally stable, durable, and low-maintenance.