Fountain Nozzles, Fountain Pumps, Pond PumpsWater Gardens, Pond Supplies, Pond Pumps, Fountain Supply, Aquarium 


Florida Certified General Contractor CGC1522736

Facebook Page

Pond Boy's Products |Home|||Contact Us|||View Cart|||Check Out|||Privacy Policy|||Shipping / Returns|||My Account|||Track Order|| |Link to Pond Boy||

Fountain Pumps
Fountain Heads
Pond Pumps
Pond Filtration
Pond Aeration
Pond Kits
Pond Lights
Pond Liner
Pond Protection
Pond Treatments
Pond Cleaning / Maintenance
Pond De-icers
Pond Plumbing
Animal Control


My Shopping Cart

> >
Geotextile Non-woven Pond Underlayment

Our Geotextile Underlayment Fabric is consists of non woven Polypropolyne stable fibers which are heat set and needle punched for superior bonding. This extremely versatile underlayment fabric has a very high tensile strength. The geofabric underlay has great physical and hydraulic properties and is used for many commercial and consumer applications.  Why do I need underlayment?

    Non-Woven Geotextile Fabric Pond and Multi-Use Underlayment Information:
  • Material: Non-Woven stable Polypropolyene Fiber Filaments bonded by heatset and needle punched
  • Resist: Tears, punctures, soil chemicals
  • Features: Extreme tolerance of Hydrocarbons, Freeze-thaw cycles, mildew, and rot
The National Resources Conservation Service is a government agency that recommends the use of non woven geotextiles for many of the below applications. Additional information and case studies can be found on their web site.

Pond InstallationLandscapeDrainage FabricFarm & CattleErosion ControlSeparation Fabric
This 6 oz Non Woven Geotextile pond underlay increases the puncture resistance of 45 Mil EPDM pond liner by 400%.Heavy Duty commercial landscape fabric that keeps weeds out but allows water to pass through.Designed for easy flow of water but with superior soil stabilization Recommended by the NRCS for separation and drainage as an inexpensive and effective soil stabilizer Recommended by the NRCS for shoreline erosion prevention and repair A medium weight underlayment for soil separation and stabilization in paving and gravel applications
Pond Liner Underlayment Garden and Commercial Landscape Fabric Filter Fabric Cattle crossing carpet and Gravel or dirt access roads Shoreline erosion Walkway, driveway, patio under paver
Rock and Boulder PaddingHeavy Duty Weed barrier Under Drain Fabric & Trench Drains Feeding Troughs, Feedlots & Watering RampsSlope and Soil erosion Roadwork and Asphalt overlayment prep

Multi-Vent Underliner System
Multi-Vent Underliner System

15 Feet Underlayment 4 oz. Weighted per Square Yard
15 Feet Underlayment 4 oz. Weighted per Square Yard
4 ounce Underlayment Specifications
Property N04
Tensile Strength (lbs.) 90
Mullen Burst (psi) 185
Puncture Strength (lbs.) 60
Water Flow Rate (g/m/sf) 150
Select Underlayment Size 
15 Feet Underlayment 6 oz. Weighted per Square Yard
15 Feet Underlayment 6 oz. Weighted per Square Yard
6 ounce Underlayment Specifications
Property N06
Tensile Strength (lbs.) 160
Mullen Burst (psi) 315
Puncture Strength (lbs.) 90
Water Flow Rate (g/m/sf) 110
Select Underlayment Size 

Underlayment Explained - Why Do I Need Underlayment?

Can I use newspaper or old carpet?

  • To answer those questions we need to know what exactly underlayment is and what it does. A proper underlayment is considered a “non woven Geotextile” That is a fancy term for saying it is a really tough material that is lightweight and easy to work with.
  • ·
  • Underlayment has only one job and that is to protect your pond liner. 45 mil Pond liner is very strong and puncture resistant but it does have its limits. Using a 6oz thickness of underlayment can improve the PUNTURE RESISTANCE of your pond liner by 400%.
  • ·
  • “I want to use newspapers for an underlayment.” Great, go right ahead. Just make sure you test the thickness that you need by stacking enough WET newspapers over a sharp rock that it does not poke thru when you put 20,000 lbs on top of it! The average 2 foot deep pond that is 11x16 foot will have enough water in it to exceed 10 TONS. That’s over 20,000 pounds of water in your pond. If you use newspapers as your underlayment you better stack them about 1 foot thick. That’s a lot of Sunday papers folks!
  • ·
  • “I want to use sand for an underlayment” SEE ABOVE. Unless you OWN the beach you are getting the sand from it is a BAD and expensive idea to try and put enough sand down to protect your pond liner from rocks hidden under the surface. These rocks will emerge over time as the HUGE weight of your pond presses down on it.
  • ·
  • “I want to use old carpet for an underlayment” Got allergies? No, well you soon will have. Yes, then stay away from your pond all together as it will soon make you sick. Look folks, saving money is my favorite past time but doing so at the risk of my health has never been high on my list. Carpets are NASTY , DIRTY, BACTERIA FILLED MOLD ATTRACTORS! And that’s when they are dry in your home. Now take this same filthy used rag and put it under your pond liner where it will sit wet and moldy for the next 10-20 years. In this case your fish will be fine but as far as the people around the pond, their health is in your hands.
  • ·
  • Save money when it makes sense and spend money to ensure your family and friends enjoy your new pond without the need for allergy shots!

Free Technical Assistance
E-mail Us
8 a.m. - 11 p.m. EST
Rain Harvesting

rain harvest system

Pond Kits

pond kit

Learning Center
Useful Links