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Proof of performance

To ensure you are well informed before making your purchase at Thede & Witte, we have illustrated a number of certifications below that attest to our high standards of quality.


The CE marking confirms the quality requirements in accordance with the regulations for building products stipulated within EU directives. The CE marking can only be used when all EU directives have been complied with.

T&W Boston 3-strip / 1-strip oiled and varnished T&W Boston 1-strip oiled T&W Boston 1-strip oiled 10mm T&W Euro 3-strip / 1-strip oiled and varnished

The internationally recognised IBR Seal of Approval was created by the Institut für Baubiologie Rosenheim GmbH in 1982. It is awarded to products that ensure healthy living conditions and simultaneously protect the environment.

More information WOCA certificate