What’s the Difference Between 5×5 and 3×3 Pool Safety Covers?

Swimming Pools Blog

If you’ve been shopping for a winter safety cover, you’ve probably seen “5×5” and “3×3” mentioned in the specs. Those numbers describe the webbing/anchor grid spacing across the cover. Think of it as the cover’s framework:

  • 5×5 cover: Straps (webbing) intersect about every 5 feet in both directions.
  • 3×3 cover: Straps intersect about every 3 feet in both directions (a denser grid).

Below is a simple, buyer-friendly breakdown to help you choose the right fit for your pool and climate.

Quick Comparison

Strength & Sag Resistance

  • 3×3: Denser strap layout spreads weight more evenly, so the cover resists “trampoline” sag under heavy snow and wind. Great for large pools, spillovers, raised walls, or where storms are common.
  • 5×5: The industry standard for most residential pools in moderate climates. Strong and safe when properly anchored, just not as overbuilt as a 3×3.

Safety & Load Distribution

  • 3×3: More connection points = more even load distribution across the cover and anchors.
  • 5×5: Fewer straps and anchors than 3×3, yet still designed to secure the pool perimeter when installed and tensioned correctly.

Weight, Handling & Storage

  • 3×3: Slightly heavier and bulkier to move, fold, and store because of the extra webbing and hardware.
  • 5×5: Lighter and a bit easier for one or two people to handle during fall close-down and spring opening.

Number of Anchors (Drilling)

  • 3×3: Typically requires more anchors drilled into the deck. That can add time and cost—especially if you’re switching from a 5×5 to a 3×3.
  • 5×5: Fewer anchors overall, which can simplify installation and reduce hardware cost.

Cost

  • 3×3: Usually costs more due to additional webbing, stitching, and anchors.
  • 5×5: Generally more budget-friendly while still delivering robust safety.

Best Use Cases

  • Choose 3×3 if… you have harsh winters (heavy snow/wind), an oversized or complex-shaped pool, a raised beam/waterfall, or you just want maximum rigidity with minimal sag.
  • Choose 5×5 if… you want strong, code-compliant protection for a typical residential pool in a moderate climate with simpler handling and a lower price.

Mesh vs. Solid Still Matters

Grid spacing determines structure; fabric type determines how the cover behaves through winter:

  • Mesh covers let rain/snowmelt pass through while keeping out leaves and debris—lighter to handle, less pumping.
  • Solid covers block 100% of sunlight to further reduce algae growth; they keep fine silt out but need drainage via a pump or drain panel.

Calm Water Pools offers premium Latham® mesh and solid safety covers that are custom-measured for your exact pool outline and features, focusing on safety, durability, and a clean spring opening. (Read more)

Replacement Tip: Match (or Intentionally Upgrade) Your Grid

Already have anchors in your deck? Replacing a 5×5 cover with another 5×5 typically lets you reuse the existing anchor layout. If you move to 3×3, expect additional anchor holes to be drilled to match the denser grid. Calm Water Pools can supply a custom Latham cover by measuring your old cover first—so you know exactly what you’re getting before production. (Read more)

Why Buy Through Calm Water Pools?

  • Custom Fit: Your cover is precision-measured for an exact fit.
  • Solid & Mesh Options: Pick the fabric that matches your climate and maintenance style.
  • Serious Safety: Load-tested hardware and anchored perimeters help protect kids and pets.
  • No On-Site Install: Calm Water Pools sells the covers; Latham arranges free pickup of your existing cover, measures it, and provides an exact estimate before your new one is made.
  • Fast Turnaround: Typical projects are completed quickly once you approve the quote (seasonal variations apply). (Read more)

How to Choose in One Minute

  1. Climate check: Heavy snow/wind? Lean 3×3. Mild/moderate winters? 5×5 is usually perfect.
  2. Pool size/shape: Bigger or more complex = 3×3 advantages.
  3. Budget & handling: Want lighter handling and fewer anchors? 5×5.
  4. Fabric: Prefer lower maintenance water drainage? Mesh. Want max sunlight block to curb algae? Solid. (Read more)

Get a Perfectly Fitted Cover

Ready to protect your pool all winter with a premium Latham® safety cover? Start here: Winter Safety Covers. You can request the free old-cover pickup for professional measuring and an exact quote—simple, fast, and precise. (Read more)

Questions? Call 240-372-4440 or request your quote today. (Read more)