The most common root barriers used are thin polyethylene sheets laid over the waterproofing membrane.
Green roof root barrier material.
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Delta root barrier is a special 15 mil 380 µm stabilized polyethylene design to be strong tear resistant and root resistant.
Root barriers are often used in green roofs to provide some protection to the waterproofing from invasive stolons rhizomes and from woody roots from trees and shrubs.
To protect the roofing membrane we recommend installing a material with a high puncture resistance and avoid plants that develop a strong root system.
Hdpe makes up 47 of the material in all plastic milk water and juice bottles in the u s.
Reliable and established products that comply with the guidelines of green roofing are important.
In my research i ve found that root barriers installed on green roofs are most frequently made of plastics and that polyethylene and high density polyethylene are the most commonly used materials.
We gladly provide more products for your green roof on request.
There are also roofing membranes on the market that can function as both a roofing membrane and as a root barrier.
On the shown pages we present an excerpt of our product range.
The long term and permanent functionality of green roofs depends upon multiple factors.
It will not absorb water and is non toxic perfect for even the most sensitive green roof plant life.