1528 Sofia , I. Beshkov Str. 1
call.:02/973 27 87, 02/873 76 88, fax: 02/973 29 10


The Research Institute of Building Materials (NIISM) was found as an independent economic organization on 01.01.1963. The main scientific departments are identified by construction industry branch subsections and are directed for developing of the relevant tasks. The mutual commitment among them gives an opportunity for solution of fundamental for the construction products industry problems.

In 1994 it was transformed according to the Commerce Law into NIISM Ltd with principal Ministry of Regional Development and Public Works.

Since 2002 on the base of Authorization ROSSP 04/12.11.2002 of the Ministry of Regional Development and Public works, NIISM has started to perform activities as a Body for construction products and FPC systems conformity assessment, Body for construction products testing in accordance with Ordinance on the material requirements towards constructions and evaluation of the construction products conformity (NSISOSSP). Authorization ROSSP 05/12.11.2002 of the Ministry of Regional Development and Public Works entitles NIISM to issue Bulgarian Technical Approvals .

Since 2007 NIISM holds new Authorizations for construction products conformity assessment in accordance with NSISOSSP-2006 and Construction Products Directive 89/106/E40 of Council of Europe respectively:

  • CPR 01 NB 1950/30.02.2014 forconstruction products and FPC systems conformity assessment under harmonized standards (part II of NSISOSSP) with identification number1950 of European Comission;

  • ROSSP - 03/17.09.2007 for construction products conformity assessment under part III of NSISOSSP (of products produced in compliance with BDS and non-harmonised EN).

  • ROSSP - 02/26.05. 2008 for BTA issue. NIISM has right to issue BTA for products produced in Bulgaria, for which there arent standards BDS and BDS EN.

In 2012 NIISM went through notification under the Construction Products Regulation (EU) No 305/2011 (CPR).

NIISM has been notified to European Comission under CPR (EU) No 305/2011 of EU Parliament and of European Council for determination of the harmonised conditions for marketing of construction products, covering all construction products from the Notifications. The validity term of the Notification is until 13.02.2017.

The testing laboratory for constructive products at the NIISM has been accredited by Executive Agency Bulgarian Accreditation Service (BAS)according to BDS EN ISO/IEC 17025 since 1993.

The laboratory holds Accreditation Certificate No 47 TL , issued by BAS, according to BDS EN ISO/IEC 17025:2006, which is valid until 01.07.2018.

At NIISM have been developed numerous Bulgarian State Standards /BDS/ about technical requirements and methods of construction products control and assessment.

The Institute is member of six Technical Committees /TK/, affiliated to Bulgarian Institute for Standardization (BDS). Experts from the Institute are actively involved in the translation and i ntroduction of European norms (EN) as BDS in conformity with Construction Products Directive 89/106/EEC requirements and CPR (EU) No 305/2011, aswell as National Annexes development to EN.

For management of certification activities on construction products and construction products production systems, NIISM has implemented Quality Management System (QMS).

The company has highly qualified and experienced specialists, capable to realize its main objectives. The personnel involved in performance of construction products tests, audits, certification, control and BTA issue, satisfy the requirements of Article s 28 and 41 of Ordinance on the material requirements towards constructions and evaluation of the construction products conformity (NSISOSSP). The staff members constantly improve their qualification by attending courses and seminars.

NIISM has set itself the objective not only to keep, but to to expand its position in the field of construction products conformity assessment and Factory Production Control systems, in order to guarantee to all interested parties that the products offered on the market satisfy the requirements towards their ssential characteristics and performances.

NIISM is one of the leading companies with permission to perform this activity and also has longstanding experience and reputation of neutral, objectiv e and correct partner.

The NIISM object of a business is as follows:

  • Scientific research in the construction materials/products;

  • Innovative products ;

  • Construction products and Factory Production Control systems conformity assessment;

  • Development of technical specification s;

  • Preparation of Bulgarian Technical Approval /BTA/;

  • Testing of construction products and row materials for their production;

  • Information service.