We recently read an article that stated decking should be installed ridges facing down which was apparently backed up by “decking experts” and manufacturers in order to increase airflow and prevent rotting.

Deck Fascia LgAs the leading manufacturer in premium quality fencing and decking, who takes pride in our expertise stemming from our rich heritage starting back in 1947, we can confirm the ridges or grooves which are designed to prevent slipping are made to be facing up.

Air flow will occur naturally underneath the decking when properly installed, it should be installed onto a frame and therefore create a box, essentially for the decking boards to be installed onto. If you choose timber decking with a long guarantee that protects it against rot and insect attack, it will not need the ridges to be faced down to aid airflow and therefore prevent rotting.


You may want to be wary about manufactures who recommend the ridges be facing down to increase the airflow, as we predict they may not offer very long guarantees and their product will likely be very susceptible to rot and insect attack.

As an outside surface, decking will get wet and damp with changing weather conditions. It’s therefore highly recommended that decking boards have ridges to provide grip and prevent slipping.  We would also recommend that the boards and ridges should be installed in the opposite direction to the traffic flow as this will also greatly reduce the risk of slipping.Decking in garden

We manufacture 3 types of decking boards, natural, heavy duty and slip resistant all with ridges and all designed to create an all year-round usable surface.