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Inferior phenolic board insulation layer falls off
construction bonding area is not enough. About phenolic insulation system construction technology requirements, bonding area should be greater than 60%. Fall off from the scene of the insulation board, bonding area is far from requirement, which is one of the main cause of the insulating layer falls off. Because of the different production process, the intermittent method producing foamed phenolic board belongs to the freedom, the product of open pore structure, result in insulation board bibulous rate is larger. Through the winter and summer seasons rotate, insulation board, after a lot of water in the winter will be frozen, so as to make the insulation plate cracking, at the same time also can destroy mortar adhesive layer, bonding strength, the serious influence system result in the crack of the insulation system, fall off.