Should Decking Be Grooved Side up?

The correct way to lay decking boards for most decking is smooth-side-up, with the ridges there to prevent rot and mould.

Should decking grooves face up or down?

Grooved Decking Should Be Fitted Face Down

To help with drainage, they should be fitted with a slight tilt in the direction of the grooves. Some people choose to put the grooved or reeded side face down to allow for airflow underneath the boards to prevent a build up of moisture.

What are the benefits of laying decking grooved side up?

People also lay the decking board groove side up because they think that the ridges help increase traction and make the deck less slippery.