Plywood cladding – peeling or flaking paint/stain

Causes

Thermal expansion and contraction of timber substrates

Loss of adhesion due to excess moisture in substrate

Poor initial substrate preparation

Oil-based (alkyd) paint applied over water-based (acrylic) paint

Surface was damp or dirty when painted previously

Dark colours

Timber swelling/shrinkage caused by moisture absorption into timber end grain if joints were not adequately primed before installation

Coating at the end of its serviceable life

Listed under: Exterior, timber and wood-based, plywood, cladding, walls, moisture, wall cladding, plywood sheets or planks

Cause

Thermal expansion and contraction of timber substrates

Repair

  • scrape and/or sand off loose paint; sand bare timber until the surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Back to top

Cause

Loss of adhesion due to excess moisture in substrate

Repair

  • scrape and/or sand off loose paint; sand bare timber until the surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Back to top

Cause

Poor initial substrate preparation

Repair

  • scrape and/or sand off loose paint; sand bare timber until the surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Back to top

Cause

Oil-based (alkyd) paint applied over water-based (acrylic) paint

Repair

  • scrape and/or sand off loose paint; sand bare timber until the surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Back to top

Cause

Surface was damp or dirty when painted previously

Repair

  • scrape and/or sand off loose paint; sand bare timber until the surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Back to top

Cause

Dark colours

Repair

  • scrape and/or sand off loose paint; sand bare timber until the surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Back to top

Cause

Timber swelling/shrinkage caused by moisture absorption into timber end grain if joints were not adequately primed before installation

Repair

  • scrape and/or sand off loose paint; sand bare timber until the surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Back to top

Cause

Coating at the end of its serviceable life

Repair

  • scrape and/or sand off loose paint; sand bare timber until the surface is sound; prime; fill joints with putty or exterior grade flexible (polyester) filler; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Back to top