Timber trims – splitting or cupping

Cause

Thermal expansion and contraction of timber

Repair

  • replace damaged boards
  • nail with single fixing in the centre of the batten
  • prime all surfaces including the back if timber is to be painted; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Cause

Swelling/shrinkage due to moisture absorption 

Repair

  • replace damaged boards
  • nail with single fixing in the centre of the batten
  • prime all surfaces including the back if timber is to be painted; paint with a minimum two coats of semi-gloss or high gloss acrylic paint

Cause

Back of painted boards not primed

Repair

  • replace damaged boards
  • nail with single fixing in the centre of the batten
  • prime all surfaces including the back if timber is to be painted; paint with a minimum two coats of semi-gloss or high gloss acrylic paint