All softwood, or hardwood, deckboards will grey over time due to the effects of sun and weathering. Even worse algae will also start to accumulate (on any surface) and this will be worse in damp areas where the sun and wind do not dry the deck. Algae is a slip hazard, particularly when the surface is wet.
Regular maintenance will keep your deck looking at its best – give the decking a good brush removing surface water and leaves, keep neighbouring vegetation cut back. If the deck is in good order then it can be gently hosed down, if using a power washer then set to gentle, high settings will improve the appearance temporarily but open the grain and make future maintenance more difficult.
If the decking looks grey and tired, then a product such as Osmo Wood Reviver has been developed to restore the wood back to nearly new! This wood reviver is a gel formulation making it easy to apply with a brush even on vertical structures including newel posts and spindles.
To enhance the deck further we would recommend using a quality decking oil from Osmo, Liberon or Rustins. In general decking oils will help slow the progress of algae and mould, they will also slow the ingress of water allowing you to brush off any beaded water on the surface. Deck oils with pigment will also revitalise the decks appearance and UV inhibitors be more effective than those in clear oils. Some oils are specifically formulated for hardwood deckboards, if used on softwood boards the coverage will be significantly reduced. Full details for application will be on the tins.
Decaying boards are more difficult to deal with because the damage is invariably done on the installation. Deck screws should be driven in just below the surface of tanalised timber, drill too deep and the protective preservative level may be breached. Other common mistakes include split board ends where screws have been driven in too quickly without a pilot hole. We still stock our first profiled ex.38 x 125mm deckboard in stock in case any boards do need replacing
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