Understanding Above Ground Pool Liner Thickness

Choosing the right pool liner is about more than just looks, it’s also about finding the right thickness to suit your pool’s needs and ensure long lasting performance. In Canada, we use gauge as the standard measurement for pool liner thickness. Here's what you need to know when selecting your liner.

What Does “Gauge” Mean?

Gauge is the common term used to describe the thickness of a vinyl pool liner. It’s important to know that unlike “mil,” which is used as a precise measurement (1 mil = 0.001 inches) of inground pool liners, gauge is not a standardized or scientific measurement. It’s more of an industry standard, everybody uses it, but it doesn’t necessarily correspond to an exact thickness across different product lines.

That said, most Canadian retailers source their liners from the same few manufacturers, so “gauge” is fairly consistent across the board in Canada, even if it isn’t a technical measurement. The industry standard is typically a 20-gauge liner which strikes a balance between durability and flexibility.

Online vs. In-Store: Same Manufacturers, Same Quality

Whether you buy your liner online or from a local retailer, you’re most likely getting a product from the same group of Canadian manufacturers. There’s no special “online quality” or “retail quality”, they all come from the same source. That means you're not sacrificing quality by shopping online, and you won't necessarily find thicker or better options in-store either.

Final Thoughts

When it comes to pool liners, thickness does matter, but not in the way many people think. Gauge is the standard reference, and while a higher gauge can suggest added durability, it's not always the best for every pool or installation. Keep in mind that flexibility, ease of installation, and overall fit are just as important as thickness. Since most Canadian suppliers source from the same trusted manufacturers, you can feel confident that you're getting a quality product, whether you buy in-store or online. The key is choosing a liner that matches your pool’s needs, not just the highest number on the label.