CJ BLOK Sp. z o. o. guarantees the quality of manufactured and sold products confirmed with EN ISO 9001:2008 certificate of No.: CQS 2245/2010, moreover, and also in accordance with the Construction Law there are issued declarations of conformity for individual products (according to the building code) with CE mark being applicable in the European  Union. Products which are manufactured  by CJ BLOK comply with PN-EN standards. The quality of our products is confirmed with the international IQ Net certificate giving the possibility to sell them all over the world.