Why does my hot tub cover get heavy?

When the vapour barrier fails, the inner foam begins to absorb more and more moisture. This absorption is a perfect breeding ground for bacteria and mildew. Not only is it a health hazard consideration, but the waterlogged hot tub cover greatly affects the other components of the cover and the lifter. Waterlogged covers begin to lose their ability to insulate and become less energy efficient. 

A waterlogged hot tub cover can lose up to 75% of it’s original R-Value or insulating capacity. Ouch ! 

Waterlogged or heavy covers also put stress on the lifters of your hot tub cover. It’s a waterlogged hot tub cover that should be replaced sooner that later.