Polythene or polyethylene sheet is commonly used as a damp proof membrane with oversite concrete for all but severe conditions of dampness.
Polythene sheet for concrete.
6 mil plastic often gets damaged.
The general standard employed for the testing and verification of polythene sheets for use as a vapor barrier is the astm4397.
Construction poly sheets are mainly used for the construction sector.
Roadways must be properly and effectively protected for safety and long term reliability concrete.
As long as the polyethylene is protected from sunlight as it obviously is when it is installed under a concrete slab it should last indefinitely.
Recently though research has shown that the old traditional layer of 6 mil visqueen polyethylene plastic under the slab is seldom effective for two main reasons.
My own advice is to install 6 mil poly and stop worrying.
It is recommended that the sheet should be at least 1000 gauge.
And to increase the effectiveness of the film and reduce its environmental impact polyethylene sheets can be rolled and stored for future re use.
Polythene or polyethylene sheet is commonly used as a damp proof membrane with oversite concrete for all but severe conditions of dampness.
Although it may seem water tight this grade of material allows a lot of water vapor to pass through.
Under slab vapor retarders play a very important role in retarding moisture from coming up through the concrete and into the structure.
The sheet is generally supplied in rolls 4 m wide by 25 m long with a weight of 1 kilo metre.
The use of polythene sheet in construction projects.
Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should be used as vapor retarders.
A concrete vapor barrier is simply a sheet of polyethylene plastic visqueen placed directly on top of the sub grade before the concrete floor or slab is poured to help keep moisture from the soil from passing up through the concrete.
These products are made.
Polyethylene sheeting under concrete slab.
The sheet is supplied in rolls 4 m wide by 25 m long.
Oversite concrete slabs employ a 1000 guage 250 microns polythene sheet laid underneath the concrete to prevent the moisture from being absorbed.
The construction and concrete industries have so gravitated to polyethylene that new types of tools have been especially manufactured to assist n sealing joints via heat and pressure applications.
Whenever i have seen holes drilled through concrete slabs i have never noticed any degradation in the polyethylene layer.
Polythene sheet roadway expansion projects must fill a number of requirements to minimise environmental impact.
Polythene sheet we are the leading manufacturer of ldpe sheet for construction and our product is made of good quality.
