Water tightness EA1200

We are trying to be flexible manufacturer who can offer to customers variation of none standard solutions which project requires. We are willing to make step forward for client and design all details for specific doors with our constructors. Together with one of our clients we invested in laboratory test to reach project demands which was Water tightness value 7A. We changed some details on doors which allowed us to successfully test our steel doors. We achieved the highest Water tightness value of  EA1200 (1200Pa pressure), however we required only 7A (300Pa pressure). Used test method was LST EN 1027:2016
Our standard single doors and double doors water tightness value is  4A
By changing some details in our doors – Our single doors can have Water tightness of up to EA1200. To achieve this value steel door price will increase.