Loss of original timber colour on clear-finished timber weatherboards

Loss of original (new) timber colour on clear-finished timber weatherboards

Causes

Weathering, UV light exposure 

Listed under: Exterior, finishes, clear finishes, timber and wood-based, timber, cladding, walls, wall cladding, stained or clear-finished timber weatherboards

Cause

Weathering, UV light exposure 

Repair

  • film-forming clear or lightly pigmented coatings are vulnerable to ageing of the underlying timber and loss of coating adhesion under UV light from the sun

  • some timber producers do not recommend clear finishes for timber elements fully exposed to sun and weather

  • recoating of clear or pigmented film-forming coatings is likely to be required every 6 months–2 years

  • scrape or sand off the existing coating to give a clean, as-new timber surface. Recoating with the same type of product will restore appearance but frequent recoating will be required.

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