Waterlogged Hot Tub Cover
When it comes to condensation collecting on the underside of your hot tub cover, there is nothing you can really do to mitigate it. However, keeping it ultra clean can prevent it from becoming waterlogged.
When you have a hot tub cover that has suffered from waterlogging, it can reduce the energy efficiency of your tub and provide a place for bacteria to grow and thrive.
If you think your hot tub cover might be waterlogged, come dive in with us as we explore what you can do to fix it.
What Is Waterlogging?
Waterlogging is when a large quantity of water becomes trapped in your cover's foam. With a moist, dark area, waterlogging provides the perfect environment for mold and mildew to grow.
If you don't properly maintain your cover or deal with excess moisture, your spa cover may become waterlogged.
There are plenty of things that you can do to stop spa covers from waterlogging, so that it does not negatively impact your spa experience.

How Does Hot Tub Cover Waterlogging Happen?
One of the most common ways that hot tub covers become damaged is when the vinyl covering becomes punctured or deteriorated. You can think of the vinyl on a spa cover as 'skin' for the foam, as it acts as a protective vapor barrier, preventing any moisture from getting inside the cover.
One of the first signs of a hot tub cover becoming waterlogged is if you notice it is heavier than it typically is. If this is the case, you will want to remove your cover from the top of the hot tub and give it a closer look to see if you can find a tear or hole where the water is getting in.
Look at the vinyl cover, as this is where any tears will start to allow water into the foam core.
How To Save Your Cover

Don't go out and buy a new cover just yet. Instead, you may be able to repair your cover by air-drying it.
When doing this, however, you need to exercise caution. Rest assured, it is not an impossible feat!
Start by removing the cover from the top of your hot tub. Once removed, carefully unzip your vinyl covering, removing each of the foam pieces that have been affected by the water.
Find a sunny spot in your backyard where you can place the foam and allow the heat from the sun to dry it out. The water that was trapped on the foam inside the hot tub should now have a chance to air it out in that sunny part of your yard.
Take your cover and turn it inside out, using a dry towel to clean off any water that is trapped on the inside. Lay your hot tub cover out in the sun as well. Using a mildew inhibitor to spray down the different parts of your cover can help prevent mold growth in the long run.
Once everything is dry, you can flip your cover back to the right side with your foam pieces back inside. If the vapour barrier tears at all during this process, it is pretty easy to purchase a new one and replace it. New bags are very inexpensive.
Final Thoughts
Not all hot tubs will have covers that are easy to fix. Certain covers on certain hot tubs might be past the point of redemption and so filled with mold or mildew that they've become serious potential health problems.
If this is the case, see The Cover Guy Reviews to shop for the highest rated hot tub covers out there.
We wish you the best of luck in trying to breathe new life into your hot tub cover. Hot tubs are a source of relaxation and wellness. The last thing you want is to have them become a source of frustration thanks to increased energy bills or a health hazard due to mold and mildew growth.
