Aluthermo Optima insulation to lose a minimum of space with a maximum performance

The choice for Aluthermo Optima was made quickly: The rafters were way too fine to place insulation between and placing a rigid board below the rafters would have meant too much height loss in the attic to convert.

The constructor BUD PROTECT  (BE) also liked that Aluthermo Optima is insulation and vapour barrier all in one.