Internal sealing

Mois­ture-vari­able va­pour re­tard­ing and air­tight­ness mem­branes made from build­ing pa­per and film, ren­ov­a­tion va­pour re­tarders and wall­pa­per, va­pour re­tarders for above-rafter in­su­la­tion, trickle pro­tec­tion mem­branes