Why Do Hot Tub Covers Get Heavy?

Heavy Hot Tub CoverEvery traditional foam filled hot tub cover gets heavy. But the how and why may come as a surprise. It has nothing to do with rain so it doesn’t matter how steep the taper is, that cover will still get heavy. If it was rain that was making hot tub covers heavy then putting a roof over the spa would stop the cover from getting heavy.

Moisture getting trapped in the foam is what eventually makes a cover too heavy to lift. But if it’s not the rain, how does the water get in there? The answer is steam from the warm spa water. When water becomes steam it is a much smaller molecule than a drop of water.

Steam can get into a much smaller area, like say the spaces in the foam. Once it cools back down and turns into water again, it’s trapped inside the foam. Once trapped in the foam the water won’t drain out so a fancy drain hole won’t help. The only way the water can get back out of the foam would be to evaporate. In order to evaporate, the hot tub cover would have to be removed from the source of steam (the hot tub) and placed in a dry, well ventilated area.

The problem has nothing to do with how well the cover is cared for or how much vinyl protector is rubbed on it. The problem is the foam. The type of foam used in hot tub covers is designed to be used as insulation in DRY conditions. For instance it works well in floors, walls and ceilings (provided it is kept dry) and is great for refrigeration applications.

However if the same foam is exposed to steam, the insulation it could offer is quickly reduced to something equivalent to wet plywood.Another Heavy Hot Tub Cover

So why is foam still being used in hot tub covers? It’s cheap and it’s the industry standard. But just because everybody is doing it doesn’t make it the best idea.

A hundred years ago the standard mode of travel was the horse. The horse had been the standard for hundreds of years. Until something better came along.

A better idea as far as hot tub covers go would be one that eliminates the foam, still insulates but stays light weight and easy to use.

Thirty years ago, (yes really, thirty years ago) that is how the SpaCap was developed. A single woman with back trouble, needed to be able to use her hot tub every day for therapy. She had to be able to get her cover off and on by herself without further injuring her back.

The cover she eventually came up with was light weight, easy to use and insulated as well as a foam filled hot tub cover. Although it has gone through many improvements over the years, the concept and principle is still the same. SpaCap.com builds custom hot tub covers for all kinds of spas including swim spas.

Don’t go out and purchase another foam filled hot tub cover just because that’s what the neighbors do. Visit SpaCap.com and get a cover that won’t get heavy or break and will make it easy for you to use your spa for years to come!

SpaCap Hot Tub Cover