mandatory for air leakage in Europe

There is no specific documentation required for LEED to demonstrate compliance with the mandatory provisions. Design professionals are assumed to be ensuring compliance with them. These particular provisions are not quantitative so demonstrating compliance would be simply a statement from the professionals involved that the project complies. I am not familiar with the European Standards on the subject.

This section does not require test results, so I would accept if your construction documents (tender documents) list that these works must be done to a standard that describes the proceedures (like taping, etc.) that are also required by 5.4.3.1.2 & 3. The materials and assemblies listed in 5.4.3.1.3 are already acceptable and really do cover most of those that one uses. Non-listed materials and assemblies usually have published values for air permeance albeit to other testing proceedures. I would be able to do a rough conversion from, for example a different pressure differential of 50 Pa, to what the flowrate would be at 75 Pa (as required by ASHRAE). If I think that the rate is safely better than the requirement, I will use my "engineering judgement" to say that it meets the requirement. As no proof is required, I would challange any challenger to proove me wrong. As mentioned before, you are not required to show a datasheet where the material or assembly lists it's results from being tested to the american standard...only that you undersign that it would comply if tested.

Hello Dear, I have almost the same question but this time concerns the building envelope. Could you tell us if it is mandatory that the thermal coefficients of my building comply with table 5 - 5.3 of ASHRAE 90.1 which governs the performance of each type of envelope? I'm lost...We are working for a project outside the United States.