Our timber frame is nearly up and we have a roofer and builder lined up for external work. I donāt think our roofer is familiar with airtight, timber frame or our builder š¬ We have been advised to use ProClima Roflex gasket and Tescon Vana tape to seal soil stack. Apologies if this is a silly question (mine usually are) but is this for penetration through the roof tiles or lower or both? Should we also be using a special flashing? Our roofing will be Danum TLE system. We are going to have to explain this clearly to roofer and builder this morning!