p>You can make an El 30 construction with min. 25 mm Troldtekt on wood battens and 100 mm mineral wool (60kg/m3) in batts assuming that the mineral wool is secured every 300 mm by either wood battens or annealed wire.</p> <p>You can also build an El 30 construction with min. 25 mm Troldtekt suspended in steel profiles (C60 system) and 2 x 50 mm mineral wool (60 kg/m3). The bottom layer of mineral wool is are adapted to the main profiles and the installation profiles, while the top layer is adapted to the quick-fit suspension bracket. </p> <p><a href="/product-advantages/effective-fire-performance/ei30/" title="EI30">More information + drawings</a></p