Decking Preservers

Wooden Decking Preservers

Using a wood preserver will help to protect decking timbers, posts and supports from mould, algae, fungi, wood rot and insect attack, all of which can degrade untreated wood over time.

Types of Wood Preservative

The 2 types of wood preserver are water-based and solvent-based, both of which are available in clear and a variety of coloured formulas. Although solvent based wood preservatives have traditionally been used, changes in legislation regarding high VOC’s (Volatile Organic Compounds) means that many traditional solvent-based wood preservers are being phased out and being replaced with water-based versions.

The benefits of Water-based preservatives is that they are far less smelly to use and less harmful to the user and environment.

Most brands of Wood preservative are generally available in both clear and coloured formulations. This means that decking can be treated but kept looking natural or coloured. Using a wood preservative as a stand alone treatment will normally keep wood protected from biological threats but will only provide limited weather protection. For this reason, we recommend that when using a wood preservative on decking, it is always over-coated with a suitable decking oil.

How to preserve wooden decking

For the best protection preserve all or as many of the timber components as possible with two coats of wood preservative. This should include both sides, edges and especially the end grain or sawn ends of the timber. The same should then be done with a suitable decking oil or after the preservative has fully dried. This will help to protect vulnerable areas that are near or that come into contact with the ground from condensation and moisture.

Choosing the right decking preserver

If you’re planning on painting or using a varnish type decking stain its worth remembering that some decking preservers contain wax. Although this is fine with decking oils, the wax content will prevent decking paints and varnish type stains from adhering to the wood. This could result in the paint or stain flaking off prematurely.

Recommended wood preservatives for decking

For complete care and maintenance of garden decking, read more on decking cleaners, decking stains, decking paints and decking oils.