For construction materials, roofslats and decking boards, a very important factor is the treatment of thematerial or impregnation against wood-destroying organisms and insects, so thatthese timbers last as long as possible. BWT’s impregnation processes have beencertified by a third-party audit company, which confirms the compliance of ourmaterials with the highest requirements.

We treat the materials with a high-pressureimpregnation machine and Tanalith® E water-based wood preservative, whichprovides the best protection.