Tsukuba Building Reseach Test Laboratory (TBTL) was established in September 1981 in Tsukuba Science City as the testing and research organization of CBL. TBTL is involved in performance evaluation tests at the request of various sectors;
Performance evaluation tests necessitating to get certificates from the Minister based on the Building Standard Law and the Housing Quality Assurance Act, like tests for sound insulation, fire prevention, fireproof material, and structural stability of wooden walls.
Performance tests necessary for the BL Labeling system.
Performance tests for newly developed building technologies, materials, components, elements at the request of various sectors. Performance tests at the request of various sectors based on the specified test methods used by the Urban Development Corporation, the Housing Loan Corporation, JIS and other professional bodies.
Testing and issuance of the certificates as neutral third party assessment body (CBL) to meet building regulations and requirements for ordinary construction materials such as aggregates, concrete, reinforcing bars etc.