Resin appearing on surface of timber weatherboards

Causes

Preservative treatment solvents causing resin bleeding in the timber, particularly pinus radiata timber where the treatment is light organic solvent preservative-treated (LOSP) 

Changes of temperature of timber, particularly where darker-coloured paint finishes have been used

Listed under: Exterior, timber and wood-based, timber, cladding, walls, painted timber weatherboards, stained or clear-finished timber weatherboards, timber shingles and shakes

Cause

Preservative treatment solvents causing resin bleeding in the timber, particularly pinus radiata timber where the treatment is light organic solvent preservative-treated (LOSP) 

Repair

  • resin bleeding will stop naturally but it may take 1–2 years; scrape off resin as it comes to the surface; once the resin bleeding stops, sand back affected areas.  Where a painted finish is required, prime with an aluminium primer, paint with at least two coats of semi-gloss or high gloss acrylic paint 

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Cause

Changes of temperature of timber, particularly where darker-coloured paint finishes have been used

Repair

  • resin bleeding will stop naturally but it may take 1–2 years; scrape off resin as it comes to the surface; once the resin bleeding stops, sand back affected areas.  Where a painted finish is required, prime with an aluminium primer, paint with at least two coats of semi-gloss or high gloss acrylic paint 

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