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Deeproot water barrier HDPE roll
Water barrier installation application
Deeproot water barrier HDPE roll
Water barrier installation application

Water/Bamboo Barrier 36-Inch by 300-foot Roll, 30 mil Thickness - Deeproot Brand

SKU WB-36-30-300
$1,262.76 - $1,262.76
$1,262.76
$1,262.76 - $1,262.76
$1,262.76
Free Shipping

DeepRoot · Water & Bamboo Barrier · Model WB-36-30-300

A 36″ × 300′ roll of 30 mil impermeable HDPE geomembrane — specified as a water barrier, a bamboo barrier or a root barrier depending on what you are holding back. It stops subterranean water movement, deflects running bamboo rhizomes, and redirects tree roots away from foundations, paving and buried services. The 30 mil sheet is the most flexible of the four gauges and the easiest to handle. Cuts to length with a utility knife, joins with sealant tape, and is made in the USA.

Roll Size
36″ × 300′Deep run
Gauge
30 milMost flexible gauge
Material
HDPEImpermeable geomembrane
Uses
ThreeWater, rhizome & root barrier
  • Impermeable — stops water, rhizomes and roots
  • Cuts with a utility knife
  • Joins with sealant tape
  • Made in the USA
  • Free shipping on all orders
Joining rolls: sealant tape is required to seal vertical or horizontal laps — an unsealed joint is a hole in an otherwise continuous wall.

01 DeepRoot · HDPE geomembrane

One Sheet, Three Jobs: Water, Rhizomes And Roots

This is an impermeable HDPE geomembrane installed vertically in a trench. Depending on what you are holding back, the same material is specified as a water barrier, a bamboo barrier or a root barrier — which is why the product is named for both of its main uses. Nothing about the sheet changes; only the application does.

Unlike a geotextile, which lets water through while holding soil back, a geomembrane is built to let nothing through at all. As a water barrier it stops subterranean water movement beneath hardscapes and maintains water equilibrium around foundations. As a bamboo barrier it deflects running rhizomes along its face and back toward the surface, where they can be seen and cut. As a root barrier it does the same for tree roots. It is a wall, not a filter.

294psi hydrostatic resistance — 30 mil

Tested to ASTM D751 Procedure A, with 80 lb puncture strength to ASTM D4833. Heavier gauges test higher.

02 Why it works

Impermeable, And Tough Enough To Stay That Way

A barrier only works if it stays intact, so the mechanical numbers matter as much as the impermeability. High density polyethylene gives break strengths of 3,735 psi machine direction and 3,877 psi transverse with break elongation over 600%, so the sheet stretches under backfill loading rather than splitting. Puncture and tear resistance are what carry it through installation, which is when most geomembranes get damaged.

03 Choose a roll

Depths, Lengths And Gauges

Depth is set by how deep the water, rhizomes or roots you are stopping actually travel. Gauge is set by how much abuse the sheet will take during installation and service — and, for rhizome work, by how determined the plant is.

RollGaugeModel
30″ × 100′40 milWB-30-40-100View 30″ × 100′ 40 mil
30″ × 300′40 milWB-30-40-300View 30″ × 300′ 40 mil
30″ × 100′60 milWB-30-60-100View 30″ × 100′ 60 mil
30″ × 300′60 milWB-30-60-300View 30″ × 300′ 60 mil
30″ × 100′80 milWB-30-80-100View 30″ × 100′ 80 mil
30″ × 200′80 milWB-30-80-200View 30″ × 200′ 80 mil
36″ × 100′30 milWB-36-30-100View 36″ × 100′ 30 mil
36″ × 300′30 milWB-36-30-300View 36″ × 300′ 30 mil
36″ × 100′60 milWB-36-60-100View 36″ × 100′ 60 mil
36″ × 300′60 milWB-36-60-300View 36″ × 300′ 60 mil
36″ × 100′80 milWB-36-80-100View 36″ × 100′ 80 mil
36″ × 200′80 milWB-36-80-200View 36″ × 200′ 80 mil
48″ × 100′30 milWB-48-30-100View 48″ × 100′ 30 mil
48″ × 300′30 milWB-48-30-300View 48″ × 300′ 30 mil
Shallower depths available. The same sheet is produced in 18″ and 24″ depths as well — see the bamboo barrier range, or call (800) 524-4161.

04 Choosing a gauge

30, 40, 60 Or 80 Mil

All four gauges are the same polymer and the same impermeable sheet. What changes is stiffness, puncture resistance and how much margin you have against a determined rhizome or a rough backfill.

GaugeCharacterTypical use
30 milMost flexible, easiest to handle and cutWater control, general landscape work, straightforward runs
40 milNoticeably stiffer, better puncture marginRougher backfill, longer service expectation, light rhizome work
60 milRigid enough to stand in the trenchRunning bamboo, aggressive roots, commercial installations
80 milThe heaviest sheet, hardest to deflectThe most aggressive running bamboo and long-term containment
For running bamboo, go heavy. Rhizome pressure is relentless and a barrier is buried for the life of the planting. The cost difference between gauges is small next to excavating a failed run and starting again.

05 Geomembrane properties, 30 mil

Tested Properties

ParameterASTM methodMean value
MD break strengthD6383,735 psi
TD break strengthD6383,877 psi
MD break elongationD638611%
TD break elongationD638737%
Puncture strengthD483380 lb
MD tear strengthD100431 lb
TD tear strengthD100433 lb
Hydrostatic resistanceD751, Procedure A294 psi
Values shown are for the 30 mil sheet. Properties for the 40, 60 and 80 mil material are available on request.

06 Product data

Specifications

BrandDeepRoot
MaterialHigh density polyethylene (HDPE) geomembrane
PermeabilityImpermeable
Depths30″, 36″, 48″ — also 18″ and 24″
Roll lengths100′, 200′ and 300′
Gauges30, 40, 60 and 80 mil
CuttingCut to any length with a utility knife
JoiningVertically or horizontally with sealant tape
UsesWater barrier, bamboo rhizome barrier, root barrier
OriginMade in the USA
ShippingFree on every order

07 Where it goes

Applications

Anywhere something below ground needs redirecting, or two soil environments need separating.

Running bamboo containment Building foundations Basement & crawl space walls Tree root deflection Retaining walls Golf course greens Sports field construction Planter & bed containment Sidewalks & driveways Patios & hardscape Soil type separation Utility trenches

08 What it does

Three Jobs, One Material

  • As a water barrier — stops subterranean water movement and maintains water equilibrium around foundations, so soil on the structure side is not driven through wet-dry cycling.
  • As a bamboo barrier — deflects running rhizomes along its face and back up toward the surface, where they can be inspected and cut rather than escaping the planting.
  • As a root barrier — redirects tree and plant roots away from foundations, paving and buried services.
  • Separates soil environments — constructed greens from native clay, or one planting zone from another.

09 Installation

Five Steps To A Sealed Run

  1. Mark the line and check utilities. Set the run between what you are containing and what you are protecting, and confirm clearances before breaking ground.
  2. Trench to the barrier depth. Keep the trench wall plumb. The barrier only works to the depth it reaches, so match the depth to how deep water, rhizomes or roots actually travel on your site.
  3. Cut to length. The sheet cuts to any length with a utility knife — no heat, no specialist tooling.
  4. Seal every joint. Sheets join vertically or horizontally with sealant tape. This step decides whether the run performs: an unsealed lap is a hole in an otherwise continuous wall.
  5. Backfill in lifts. Keep the sheet vertical and tight against the trench wall as you go, and inspect the finished run for punctures and open laps before closing it up.

Add Sealant Tape

For rhizome work, leave the top edge proud. Standing the barrier an inch or two above grade lets you see a rhizome that has tried to cross over the top and cut it before it establishes on the far side.

10 The full HDPE range

View Our Full Selection Of HDPE Barriers

Because this is one material serving three purposes, the range is catalogued under more than one heading — the rolls are the same product whichever list you find them in. If the depth, gauge or length you need is not on this page, the wider selections run from 18″ to 48″ deep and 30 to 80 mil.

View All HDPE Barriers

11 Free shipping, every order

Shipping And Volume Orders

Free shipping on every order at Landscape Discount — every roll ships free, with no minimum order.

Running a long perimeter? Orders over $5,000 qualify for volume pricing. Call (800) 524-4161 or submit a product quote request and we will put together written volume pricing for your project.

12 Common questions

Water And Bamboo Barrier FAQs

Why is it called a water barrier and a bamboo barrier?
Because it is one material with more than one job. The same impermeable HDPE sheet stops subterranean water movement, contains running bamboo rhizomes, and deflects tree roots. Nothing about the roll changes between those uses, so it is listed under both names.
Which gauge should I use?
30 mil suits water control and general landscape work. 40 mil gives more puncture margin for rougher backfill. For running bamboo, 60 or 80 mil is the sensible choice — rhizome pressure is relentless and the barrier stays buried for the life of the planting.
How deep should the barrier be?
Deep enough that whatever you are stopping cannot travel beneath it. That depends on your soil, drainage, and the species involved. Depths from 18″ to 48″ are available; for running bamboo in good soil, deeper is safer. If you are protecting a structure, take the depth from the design rather than estimating.
How do I join two rolls?
With sealant tape, vertically or horizontally. The sheet itself is impermeable, so the joints are the only place a run can fail — tape every lap and inspect before backfilling.
Can I cut it on site?
Yes — it cuts to any length with a utility knife. No heat welding or specialist tooling is needed for either cutting or joining.
Will it contain running bamboo?
That is one of its primary uses. The barrier deflects rhizomes along its face and back toward the surface rather than letting them pass. Leave the top edge standing an inch or two above grade so you can see and cut any rhizome that tries to cross over the top, and check the line each season.
Is it the same as a geotextile fabric?
No, and the difference matters. A geotextile is designed to let water through while holding soil back. This is a geomembrane: impermeable, designed to let nothing through. A landscape fabric will not stop water movement or a rhizome.
How much does shipping cost?
Shipping is free on every order at Landscape Discount — every roll ships free with no minimum order.