Purchase multiple
quantities to acquire your desired coverage of Underlayment. Example If you need 700 sq ft. You should purchase 500 sq ft and then add 200 sq ft as
a seperate item.
Underlayment is a soft,
polyethylene fabric that will last 20+ years under your liner. It is a 3-dimensional underlayment that allows gas to escape. It has a non-slippery
surface and provides protection for the liner from rocks and other sharp objects, spreads easily and saves time compared to using newspaper or sand.
This is a non-woven, needle-punched Geotextile.
- Protects the liner against sharp objects such as rocks and roots.
- Allows gas to escape from underneath the liner
- Sold in 7.5 foot width
- Can be overlapped and Does not need to be
seamed
You should purchase the equavalent amount of Underlayment as you did liner. For Example if you purchased a 10 x 15 Pond
Liner and a 5 x 10 Stream Liner you purchased 200 sq ft of Liner. Therefore, you should purchase 200 sq ft of underlayment.
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