Why do hot tub covers and closed cell foam absorb water? Most people incorrectly believe that this is because cell foam can't absorb water. In reality, it will not do so even in low-pressure water.
This issue can cause the temperature difference between the bottom of the tub and the top of the shower cover to become too warm. This causes the warm air from the spa to become trapped on the bottom of this structure.
In most cases, the chemicals like chlorine or bromine, or ozone can break down the vapor barrier, which is a feature of most spas.
What's wrong with a heavy spa cover?
The R-value of a spa cover drops dramatically when the water gets too hot. Also, the weight of the water can cause the reinforcement bar to bend unnaturally.
If you have a spa cover that's got a lot of water, try calling a second person to lift it off of the tub. It can also cause injury if it gets too heavy.
Causes of a Waterlogged Hot Tub Cover
- Torn foam panel protective barrier
- Deteriorated foam panel protective barrier
The 6 mil plastic sheeting that's used to wrap your foam core panels is the most important component of protecting your spa cover from water damage. It's important to remember that the vapor barrier should be tightly secured to prevent any gaps or tears.
For example, Hot Tub Works spa covers are made with a double-wrapped foam core, which can be used as an option for other covers. These covers are vacuum shrink and heat sealable, and are available in a variety of colors.
How to Avoid a Heavy Hot Tub Cover
- Remove the spa top twice weekly for 2 hours, to allow the cover to breathe.
- Avoid unzipping a spa cover or removing panels; creates voids for moisture to enter.
- Maintain proper water chemistry, and keep sanitizer at a minimum level.
- Always remove the cover for several hours after shocking the spa water.
- Patch any holes or punctures in the vinyl cover or foam barrier immediately.
- Clean and condition the exterior vinyl on your spa cover once or twice per year.
- Protect your spa cover from damage by keeping it locked, or use Hurricane straps.
Also, choosing a quality spa cover will prevent many problems caused by improperly sealing foam panels. Also, buying from a company that has a reputation for being reliable will allow you to trust them more.
How to Dry out a waterlogged spa cover
Once the vapor barrier has been compromised, it is possible to remove the foam panel from the spa. This will help drain the excess water that has accumulated.
Since the panels are encased in plastic, they won't dry out even if you remove them. Also, they're not designed to withstand extremely hot conditions.
The only thing you can do is try to find the leak or rip, and then make a repair.
The best thing to do when your hot tub lid gets waterlogged is to set aside $300 to $500 for a new spa cover. This time, you may opt for a spa cover with a thick and resilient foam core.
If you have any other questions about pool and spa products please do let us know - we are here to help!