Problem - Alligatoring
Patterned cracking on the paint film surface.

Possible causes

  • Natural ageing of oil-based paints. As the temperature fluctuates, the constant expansion and contraction results in the loss of elasticity in paint film and causes it to crack.
  • The paint coat is too thick.
  • Old surface with too many existing coats.


Remove loose, flaked paint with a scraper or wire brush. If the paint coat is too thick, remove it entirely.

Clean off all dirt and mould from the surfaces with Tikkurila Homeenpoisto according to instructions on the label (see Mould on exterior surfaces). Rinse thoroughly and allow to dry.

Before application, ensure that the surface is completely clean and dry. Apply primer to the clean wooden surfaces. Finish with a suitable Tikkurila exterior paint according to instructions. Avoid applying thick coats.

Do not paint in direct sunlight. The best weather for painting is when it is warm and overcast. See the product label for information on painting conditions.