Paint peeling due to loss of adhesion. Peeling may affect all the coats or only one of them.
- Level surfaces coated with products that form a film; surfaces on which snow and rain collect. Painting over damp surfaces, or painting while it rains.
- Surface dampness: panels without vent holes, humidity penetrating through unsealed joints, seal deterioration, leaking roof or walls, no coating applied to board ends and joints, or the plinth is too low.
- Previous paint coats have blistered (see Blistering) or cracked (see Cracking on exterior surfaces and Alligatoring).
- Poor surface preparation, such as inadequate cleaning or removal of chalk.
- Numerous coats - excessive total coating thickness with no paint film flexibility.
- Unsuitable paints used together.
SolutionFind the cause. If the cause is structural, make necessary repairs before repainting.
Remove loose and peeling 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.
Use products that do not form a film when treating level surfaces. 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.