Decking Cleaners

Wooden Decking Cleaners

Keeping garden decking clean not only keeps it looking great, it helps to maintain the look and protective properties of decking finishes such as decking oils, stains and paints.

Decking cleaners are used as both a preparation and maintenance aid. Perfect for use as a pre-treatment, a decking cleaner can be used to remove surface dirt, debris, mould, algae, fungi and other surface contaminates prior to applying a decking finish.


Mould and Algae on wooden decking can be slippery and dangerous

Why should decking be cleaned on a regular basis?

  • To keep wooden decking looking its best for longer
  • To prevent the onset of mould algae and fungi
  • Reduce the chances of decking becoming slippery and dangerous
  • Helps to maintain the look and performance of decking finishes
  • Helps to prevent wood rot and decay

Popular Decking Cleaners



You can find details on a full range of decking cleaners and restorers here.

How to Clean Decking

The following steps are for softwood and hardwood decking that has been treated with a decking oil, stain or other decking finish.

  1. Remove garden furniture, pots, plants and other items prior to cleaning
  2. Sweep decking with a stiff brush or broom to remove surface dirt & debris
  3. Apply the decking cleaner as directed on the container

Using decking cleaner as a pre-treatment

This process is ideal for old or untreated soft and hardwood decking that has turned grey / silver over time as a reult of weathering and UV damage.

  1. Remove garden furniture, pots, plants and other items prior to cleaning
  2. Remove surface mould, algae or fungi with a scarper, stiff broom or brush
  3. Sweep decking with a stiff brush or broom to remove all surface debris
  4. Clean the deck with the decking cleaner, following the manufacturer’s instructions on the container at all times
  5. Allow the decking to dry fully
  6. To restore the colour of decking that has turned gey or silver over time, use a dedicated decking restorer (see below)
  7. Treat the deck with a suitable decking preserver to help prevent reinfestation of mould, algae and fungi
  8. Allow the wood preserver to dry fully, as specified on the tin
  9. Apply a decking treatment such as a decking oil, decking stain or decking paint

Popular Decking Restorers

Decking restorers are products that help to reverse the chemical processes that turn decking timbers grey and silver over time. Best used on bare wood decking or decking that hasn’t been treated for a number of years, these products help to reverse the damage caused by water and UV rays to restore the natural colour of decking boards.

Decking restorers are products that are scrubbed in to the decking boards with a stiff brush, broom or abrasive pad and rinsed off with clean water after 15 to 20 minutes. The natural colour of decking normally returns within 24 hours.

Decking that has been left untreated and has been grey or silver for a long time may require a second application. Once the process has been completed, decking can be treated with a wood preservative and then a decking finish.

Top Tip

Sweep decking with a stiff broom or brush on a regular basis, even through the winter months and especially if it is near or surrounded by bushes, trees and other plant life. This removes leaves and other debris from the deck that will otherwise decompose and mulch down in the groves of decking boards. Decomposing plant matter can promote mould, algae and fungi that can make decking slippery and dangerous. It can also degrade the decking finish or treatment at an accelerated rate which can ultimately lead to the onset of wood rot and decay.

Always wear gloves, old clothing and eye protection when applying decking restorer to decked areas.

Need to know more about other decking treatments and finishes? Read more about decking oils, decking stains, decking preservatives and decking paints.