Insulation system, which products do not dare call themselves the product both permeability, good thermal conductivity, xps extrusion board, waterproof performance good, xps extrusion board b1, not absorbent, good for a full accounting. Because these indicators are contradictory, but also pay attention to ventilation breathable construction process after wet water permeability and the system after completion. xps board, many of use are embossed slotted most beneficial use, xps extrusion mill, the surface treatment, large domestic manufacturers have been realized, some small manufacturers still use a smooth surface xps board is manufacturing methods. 2, rigid polyurethane panels with moisture, water resistance. Rigid polyurethane closed porosity of 90%, Baoding xps extrusion board, are hydrophobic material, and will not absorb moisture increases thermal conductivity, the wall is not water seepage. 4, since the polyurethane sheet has excellent insulation properties, achieve the same insulation requirements under, can reduce the thickness of the external structure of buildings, thereby increasing the indoor area.