Decking that becomes slippery when wet

Slippery Decking: Making It Safe Again

Deck boards are slippery for the same reason patios are — a thin biofilm of algae on a smooth surface. Shade, poor airflow and standing water make it worse.

Grooved boards, contrary to popular belief, are not automatically safer.

Composite Decking and Fencing work by Gardenscape in Essex

Cleaning that lasts

A deck cleaner with dwell time removes the biofilm far more effectively than a quick wash. Pressure washing timber raises the grain, which then holds more moisture and grows algae faster.

Clearing debris from between boards restores drainage and airflow.

Grooves, inserts and coatings

Grooves running across the run of travel help; grooves running with it can channel water and hold algae. Retrofitted anti-slip strips or inserts set into the boards give reliable grip in the places that matter — steps and the route to the door.

Anti-slip decking paints work but need recoating.

Composite and position

Textured composite boards hold grip better and grow less algae because they absorb little water. They still need cleaning in deep shade.

Where a deck sits under trees in permanent shade, improving light and airflow does more than any product.

Frequently asked questions

Is composite decking slippery?

Less so than weathered timber, but no outdoor surface is slip-free when covered in algae.

Do anti-slip strips look obvious?

Inset strips sit flush and are discreet, particularly in a colour close to the boards.

How often should decking be cleaned?

At least annually, and twice a year in shaded or tree-covered gardens.

Deck slippery in winter?

We clean, retrofit grip and replace decks with textured composite.

Talk about your deck Call 07535 661664