The key factor in preventing slippery decking is to ensure that the deck surface is kept clean and surface deposits such as mildew, algae and fine mosses are kept at bay. It is these deposits that cause slipperiness in wet weather on any outdoor surface; even stone flags.
Remember also that wet weather can be experienced throughout the year and so slippery decking can be a year round issue if you don’t manage your decking correctly.
We would recommend that you frequently brush your decking with a good quality, stiff brush to remove dead leaves, dirt and moss. You should also give decking a thorough clean at least annually, using a specialist decking cleaning product and either a scrubbing brush or pressure washer. This is usually undertaken during the spring or autumn.
Regular cleaning and maintenance such as this will certainly help to reduce slippery decking. TDCA members produce a range of deck cleaning, maintenance and decorative products to help keep decks looking good.
A further precaution to slippery decking is to choose an anti-slip decking product when you first construct your timber deck. There are many designs on the market, the most common seeing the timber deck enhanced with a grit and resin formulation that sits in some of the grooves in the board, offering a reassuring grip. The enhancement is subtle and does not detract from the natural charm of the timber.