There are many reasons for the failure of polyurethane direct buried insulation pipe waterproofing, the following small make up simple to share with you, I hope to help you.

　　Bottom not clean clean: because in waterproof construction, force the ground clean, clean, and although do not have dust and loose material, or it will break the ranks the waterproof layer and the lower bond is not a sign of strong, leaving leakage hidden trouble. The bottom has moisture: because of polyurethane waterproof coating for oily ci-poetry, waterproof material can therefore be forced to become truly element before construction dry, otherwise, after doing waterproof, moisture wrapped inside, large strength of steam alternately by the sun, will be polyurethane waterproof layer.

　　Polyurethane waterproof coating waterproof layer too thin: polyurethane waterproof layer force arrived at the required thickness is waterproof effect, because of the polyurethane materials should have lower water absorption characteristics of ci-poetry by themselves, if the thickness of the membrane, through a series of torrential rain, the rain through the polyurethane layer to the bottom, through good climate of sunshine, is still in the bottom of the water vapor, into the waterproof layer.

　　Paste on the corner of all of the glass fiber grid cloth strengthen is dealt with, in order to avoid leakage of polyurethane waterproof layer fracture into. Material ci-poetry slightly qualitative: due to the market the ci-poetry price for waterproof material, cause a lot of collecting ci-poetry produces polyurethane materials manufacturers to cut corners on the ci-poetry waterproof material, own property to land, this will make the waterproof material waterproof cause failure.

　　Construction experience is not as good as: waterproof construction by the waterproof focus construction team to implement control, not to go to the hardware building materials wayward to buy some waterproof material jiuki to besmew.