Needle Punched Underlayment
(Products available at bottom of this
page)
To help
protect your EPDM Fish Safe Liner from unwanted punctures, first
put down this 4 oz Nylon Felt Underlayment. It will never rot
unlike newspapers, carpet padding, & carboard. This soft,
polyethylene fabric will last 20+ years under your pond liner. It
is a 3-dimensional pond 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 fabric.
TJB-INC sells underlayment in three different
ways.
- We offer
pre-cut sizes that are boxed and can be shipped by UPS.
- We sell bulk
rolls of different widths and lengths that are shipped by truck
freight. These are great for large projects or installation
contractors
- Custom Cut
lengths in either 7' 5" or 14' 11" widths
TJB-INC INSTALLATION TIPS:
-
We use this underlayment in all of our water feature
installations.
-
Anywhere we install EPDM liner, we first put down 1 or
more layers of the underlayment. The amount of layers is
determined by how clean the soil is under the liner. If there
is not a lot of rocks or roots, one layer will do. If you are
installing pond liner over rock, roots, or sharp debris, then
we recommend putting a layer of sand or stone dust down first on
all of the horizontal surfaces. Then follow-up with a layer
of underlayment. If your sidewalls are bad, then sand won't
work for vertical surfaces. This is where we would double or
triple layer the underlayment so we are protected against punctures
in the liner from buried debris.
-
If you are placing large rocks in the pond, cut a piece
of unerlayment to go between the rock and the pond liner. If
the rock is very rough, use several layers of fabric.
-
Most punctures are caused when you go to re-position a
rock when it is on top of the liner. As you swivel the rock,
it grabs the liner and creates a tear. This can still happen
if you use a scrap piece of pond liner. Rubber
against rubber grabs and can still tear the pond
liner. That is why TJB-INC recommends using a piece of
underlayment (instead of extra liner) under the larger rocks.
Do not worry how it looks. When you add the smaller
filler rocks and the gravel, the piece of underlayment you used
will be covered up.
-
Underlayment is cheap compared to having to go back and finding
a leak(s) & repairing it!
To view a printable .pdf copy of the MSDS (Material
Safety Data Sheet) that has been filed with the EPA, click on the
link at the end of this statement. To return to this screen,
click on your browser's BACK arrow (located in the upper left
corner of your screen). "DOWNLOAD
MSDS"
