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， which is constituted by a hot-scarfable layer composed of a first layer that is composed of polypropylene non-woven fabric or polyethylene film or PP film (optionally treated with silicone) or talc or sand and by a second layer that is composed of a first elastoplastomeric bituminous mixture with adhesive properties so as to saturate a third layer that is constituted by glass fibre， or glass cloth， or fibreglass nets， or nets or fabrics made of composite materials so as to define a framework with a grammage that is comprised between (40-100) g/m 2， the structure comprising a layer that is constituted by LDPE or LLDPE or HDPE or PP or PA or EAA or EVA or EVOH or SURLYN or by PET (10-40??)， which is made by means of extrusion， and a layer that is constituted by aluminium (7-30 ??)， and a 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 a layer that is constituted by a PIR/PUR panel.