In our offer appeared phased stone wool boards for thermal insulation, acoustic and fireproof. Petralamela-F and Petralamela-FG unilaterally primed are the answer to the rising demand for ceiling insulation over garages, cellars and crossings. It is worth pointing out that the declared thermal conductivity λD for both products is less than 0.037 W / mK. Our new product has already hit the hands of heat insulation workers and the first reviews are very flattering.