Panel structure that is impermeable to gases， particularly for the insulation of buildings

A panel structure that is impermeable to gases， particularly for the insulation of buildings， constituted by a hot-scarfable layer that is composed of a first layer composed of polypropylene non-woven fabric or polyethylene film or PP film (optionally treated with silicone) or talc or sand and of a second layer that is composed of a first elastoplastomeric bituminous mixture with adhesive properties， and of a third layer that is constituted by LDPE or LLDPE or HDPE or PP or PA or EAA or EVA or EVOH or PET (10-40) ?? which is made by means of extrusion， and of a fourth layer that is constituted by paper with a grammage comprised between (40-100)g/m 2 with rough or crown effect， and of a fifth layer that is constituted by PE or PP or PET (10-40) ?? which is made by means of extrusion and which functions as an adhesive layer， of a sixth layer that is constituted by aluminium (7-30 ??)， and of a seventh layer that is constituted by PE or PP or PET (10-40) ?? and is made by means of extrusion or which is constituted by lacquering (for example epoxy， acrylic， nitro)， and of an eighth layer that is constituted by a PIR/PUR panel.