Sometimes a chalky white layer can appear on exterior walls. Whilst some exterior paints are designed to do just this, sometimes it can be the sign of an issue.
There are a number of reasons Chalking can occur:
- Water borne paints being applied in temperatures below 5 degrees.
- An interior paint being used for an outdoor application
- Inadequate sealing of a porous surface
- Over-thinning a coating
- Remove chalk by washing or power washing the surface with a surface appropriate cleaner.
- For best results firstly ensure that the correct primer/base coat is being applied. Applying a Stabilising Solution or an Alkali Resisting Sealer before coating will help to reduce the risk of chalking.
- After applying the stabilizer, apply one of the 3 high quality paints for outdoor use by Sandtex.
Note: Always check a product’s data sheet and back of pack to double check that it’s the best product for your chosen surface.