Hard Polyethylene Sheet, Brand Name : ABM SAUDI

Polyethylene sheets benefit construction quality in a number of ways, some which are described below:

• To be used during building construction to prevent structural damping that occurs when warm, moist air penetrates inside a concrete lab,wall,roof or floor structure reaches the dew point, and then condenses into liquid water.
• The warm,damp air may penetrate a wall from the inside of a heated buiding in a cold climate or from the exterior of an air-conditioned building in a warm climate.
• This condensation may allow mold growth,rotting of timber,corrosion of metal components and reduction in the thermal insulation’s effectiveness.
• The resulting structural damage may occur without visible indications until significant damage has occurred.
• The most effective method of controlling damping is using an impervious vapor-barrier on the warm side of the structure.
• It has an extremely low water permeability rating of typically 1.7SI Perms.
• It can be used in between the insulation material and structure surface to act as a damp-proof membrane.
• Oversite concrete slabs employ a 1000 guage(250 microns) polythene sheet laid underneath the concrete to prevent the moisture from being absorbed.
• The general standard employed for the testing and verification of polyethylene sheets for use as a vapor-barrier is the ASTM4397