When the need arose to expand our sausage drying rooms, which are also equipped with natural smoking capabilities, we chose to use BRUCHA panels because of their ability to seal the chambers to contain any rogue smoke from infiltrating the building. The rooms have been operational for over two years without any issues and plans are underway to add additional rooms, again using BRUCHA, because of their demonstrated expertise in constructing these airtight , hygienic chambers. Great product and expert installers.