First question: is impregnation actually needed?
Impregnation is for applications in contact with water or soil, or exposed to outdoor conditions. On a furniture component that stays entirely indoors it is unnecessary and only adds cost.
In the catalogue, natural planed surfaces are dispatched without impregnation; impregnated planed timber is a separate product group.
Three colours, three tendencies
All three serve the same protective purpose; the difference is in appearance.
- Clear: preserves the natural tone. For façades and water-contact work where the grain should show.
- Green: the classic green tone. For park and garden furniture and exterior structural elements.
- Brown: preferred for decking, façade cladding and decorative work.
Cutting order: the most common mistake
Impregnation always comes after cutting. Cutting impregnated material afterwards exposes an unprotected inner surface, and decay starting there affects the whole element.
Lengths in the cutting list therefore have to be settled before impregnation. Leaving an allowance to be trimmed on site creates a protection risk.
Conditioning after treatment
After the vessel, the material is conditioned, then packed and dispatched. Surface treatments applied before conditioning is complete may not give the expected result.