Boat Covers: Waterproof or Water-Resistant?

April 8, 2009

A little water isn't going to hurt anything.

A little water isn't going to hurt anything.

People always ask me if my covers are waterproof. I always have to say that they are water-resistant. The difference is mainly that waterproof boat covers will not allow any moisture through them, regardless of how long the water has been standing, how much comes down, or whether the cover is sloped. In short, a waterproof cover is like wrapping your boat in visqueen and dropping it in a plastic bag.

Why aren’t my covers waterproof, you ask? Well, covers that won’t let water in, won’t let water out. In other words, they don’t ‘breathe,’ causing all kinds of nasty problems like mold and mildew. Waterproof covers must have vents to avoid this, and consequently, can let in even more moisture and other undesirables than a water-resistant cover.

Water-resistant materials: coated polyester, canvas, nylon

Water-proof materials: vinyl, polypropylene

Keep this in mind when shopping for a cover.

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One Response to “Boat Covers: Waterproof or Water-Resistant?”

  1. This is a great way to explain the meaning of waterproof boat covers. Many people get confused and think that it’s totally waterproof resistant when it’s not. Great post.

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