Rain screen solutions over semi-finished products supporting elements are, in general, light weight solutions; therefore have low thermal inertia and need designing an elaborated wall section by the addition of layers so as to achieve a good acoustic performance. They also need special care when considering airtightness. Dry construction is more likely to have air leaking than the wet one. The perfect sealing of the joints plus the protection from humidity of the boards conforming the supporting elements justify the addition of a specific membrane that prevents air and moisture infiltration.
