Knowledgebase
Welcome to the BTL Knowledgebase. Ever since we started lining ponds, creating covers, and helping people with their projects, we've gotten asked a lot of questions. Many of these questions are repeatedly asked, so we put together the BTL knowledgebase to help answer any questions you had about a particular subject. We are adding new questions every month, so continue to check back often!
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Is It Better To Buy A Pond Kit With A Liner Included, Or Buy The Components Separately?
Pond kits can look like a quick and easy way to dip your toes into the backyard pond experience, but those kits are designed for the lowest common denominator consumer, not the long-term success of the pond.
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How Long Should A Good Pond Liner Last Before I Have To Replace It?
All pond liners are vulnerable to damage in one way or another, but the geosynthetics industry has developed tests to help estimate the average lifetime of specific liner materials.
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How Do I Calculate How Much Pond Liner I Actually Need Without Wasting Money?
The easiest way to avoid spending more than you need on a pond liner is to work with a fabricator that can cut and seam your liner to match your pond's layout.
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Is It Better To Pay More For A Reinforced Liner Now Or Just Patch A Cheaper One Later?
Patching a pond liner—especially a cheap one—is a lot harder than patching an innertube.
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What Makes A Cheap Pond Liner More Expensive In The Long Run?
A low-priced liner has often been produced by cutting quality, and the effects may not appear until years after the installation.
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Should I Buy A Few Small Liners And Seam Them Together To Save Money?
Buying several small liners and piecing them together may give you a better number at the bottom of your receipt, but ultimately that strategy is a false economy.
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Why Do I See Such A Wide Range Of Prices For Pond Liners That Look Exactly The Same?
When you see a wide price gap between liners that look identical, you are usually seeing the difference between basic retail plastic and a verified, engineered geomembrane.
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Does The Liner I Choose Actually Affect How Much Maintenance I'll Have To Do?
Yes, and the impact is significant.
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Can I Save Money By Using My Old Liner As Underlayment For The New One?
While it's undoubtedly tempting to leave an old liner in the hole to provide a secondary cushion (what harm could it cause?), this is one temptation you shouldn't indulge in.
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What Is The Difference Between Tensile Strength And Grab Tensile On A Spec Sheet?
Tensile strength is a measurement of how far a material will stretch before it snaps, like a rubber band.
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Does The Liner Material Affect Water Clarity?
A high-quality pond liner shouldn't have any direct negative effect on water clarity, although a poorly installed or low quality liner can contribute to conditions that do.
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What Happens To Liners In Freezing Temperatures?
Winter can be a tough season for low-quality pond liners, especially those that become brittle in cold temperatures.
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Can A Liner Be "Too Heavy"?
Yes, heavy liners are not only expensive to ship, they're difficult to install.
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How Do I Know If A Liner Is Safe For My Fish?
"Fish Safe" is a term that's used freely and loosely by retailers, so it's wise to be cautious.
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What Good Is A Reinforing Scrim In A Pond Liner?
A reinforcing scrim is a woven grid of high strength yarns that provides powerful strength, puncture resistance, and dimensional stability.
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Does UV Resistance Matter If The Liner Is Covered By Rocks?
Yes, even if a pond liner is eventually covered by rocks, UV damage can begin during installation.
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What Causes A Pond Liner To Sag Or Creep Down Slopes?
Liner creep happens when a liner fails to retain its shape and elasticity.
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What's The Benefit Of A Reinforced Liner Over A Sheet Of Rubber?
A reinforced liner is built to resist punishment, like a radial tire, while a rubber sheet is essentially an unreinforced inner tube.
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What Is Dimensional Stability And What Does It Have To Do With My Pond Liner?
Dimensional stability is your liner's ability to maintain its shape.
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Is Puncture Resistance The Same As Thickness?
People often equate the two, but thickness is a physical measurement while puncture resistance is a performance rating, and they mean different things
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Why Do Professional Installers Prefer RPE Over The Rubber Liners Found In Stores?
Professional installers appreciate RPE's relative easy installation compared to EPDM.
How Do I Find A Liner That Won't Tear If My Ground Shifts?
If you live in an area with expansive clay or a high freeze-thaw cycle, you need a liner with dimensional stability.
Where Can I Get Expert Advice On Which Liner Thickness Is Right For My Depth?
If you're planning a deep pond, consult with a liner fabricator who's had plenty of experience in deep-water containment.
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