TIMBER
Clean away winter
Winter in the Cape leaves behind more than rain. Leaves, soil, algae, moss, and other organic material can accumulate in joints and shaded areas, keeping timber damp.
Remove debris and clean the surface with an appropriate timber or deck-cleaning product and a stiff brush. A pressure washer can be useful in the right hands, but excessive pressure can damage the surface and raise the grain. Allow the timber to dry properly before applying any protective finish.
Check the structure carefully
A spring inspection should include a search for fungal decay and insect activity. Plantation-grown pine and eucalyptus, for example, are not naturally durable and require appropriate preservative treatment where exposure demands it.
SAWPA’ s H-classification system matches treatment levels to intended use. The H3 covers many exterior, above-ground applications, including decking, beams, fencing, garden furniture, gates, steps, and cladding.
Weathering is also common, especially in imported hardwood objects. The silver-grey colour of weathered timber is principally a surface effect caused by UV exposure. More serious problems arise when repeated moisture movement causes checking and cracking, or when persistent moisture creates conditions for decay.
Where timber needs to be replaced, choose material and preservative treatment suited to its level of exposure. Exterior above-ground applications and timber in contact with the ground have different preservation requirements.
Don’ t confuse weathering with deterioration, or a cosmetic coating with timber preservation.
Protect it for summer
A finish does more than make timber look attractive. SAWPA notes that exterior finishes can help control moisture content, absorb damaging UV radiation, and accommodate movement in the timber caused by heat and moisture.
In an exposed, dry climate, UV protection and controlling moisture cycling may take on a particular importance. In a wetter environment, keeping water from becoming trapped against the timber and maintaining sound preservative protection may take priority.
The specified product must therefore suit the timber, its exposure, and the required appearance. A decorative hardwood deck, treated-pine fence post, and painted garden bench do not necessarily need the same maintenance regime.
Maintenance beats restoration
A couple of hours spent inspecting timber every spring can reveal a loose fixing, blocked drainage point, or deteriorating board while the problem is still relatively inexpensive to fix. When left unattended, the same seemingly small defect can lead to water ingress, decay, and, ultimately, structural replacement.
Good timber maintenance begins with understanding what the local climate is asking of the wood.
The spring timber checklist
Decks and steps Posts and beams Balustrades and handrails Fences and gates Garden furniture End-grain and joints Ground-contact areas Loose fasteners Soft or crumbly timber Algae, moss, and trapped moisture Evidence of insects or fungal decay Finishes due for renewal
Be careful when inspecting load-bearing posts, beams, stairs, and balustrades. These may need more than a lick of paint. If you are uncertain, call an expert.
Repair before you protect
This is where many maintenance jobs go wrong. It is tempting to clean everything and immediately apply a fresh coat of oil or sealer, but the cause of the problem must be fixed first.
• Replace badly deteriorated boards.
• Tighten or replace loose fixings.
• Remove vegetation or fungus that traps moisture against the timber.
• Correct obvious drainage problems.
• Make sure water can escape from joints and that the bottoms of posts are not permanently standing in wet ground.
78 spring 2026 | www. tobuild. co. za