Spa and Hot Tub Covers

All this talk about going green, a big part of saving the environment is to not create more waste that will just end up clogging our land fills. Follow me on this for a minute… There are 10 million spa owners in the USA, and each one of them uses a typical rigid foam spa cover on their hot tub. For the sake of this demonstration each foam cover is only two inches thick and every spa is eight feet by eight feet. That would mean each spa cover contained about 10.666 cubic feet of foam per spa cover. For the rest of this example we will use 10.5 cubic feet per cover.

If each cover on every spa becomes saturated within two years and needs to be replaced that would mean that we would be adding 52.5 million cubic feet of waste to our landfills in just spa covers every year.
If it takes two and a half covers worth of foam to make up one cubic yard that translates to 4 million cubic yards of waste added to our land fills every two years just in spa covers.

If there are 11 million Cubic yards of stone in the Great Pyramid at Giza, we are adding enough foam to build a duplicate of it to our landfills just from used spa covers every six years conservatively. There are four and a half million cubic yards of concrete in Hoover Dam. We could build a two lane highway of discarded foam filled spa covers from Seattle Washington to Miami Florida every two years.

In case you have not noticed most foam filled spa covers are not two inches thick anymore. If all those old foam covers were four inches thick all these calculations would be double.
But we are just being conservative so we want to stick with two inches thick. If we ripped the covers in half and laid those pieces end to end we could circle the earth at the equator on used spa covers every two years.

Heck with parking lots, in a few years we could pave the entire planet with foam just from saturated foam spa covers from the USA alone.

So what is the solution? Well shop for a better spa cover. There are options available on the internet that your local spa dealer probably does not offer. You do not have to quit using your spa to save us. You just need to get a Spa Cover that does not use foam to insulate. There would be two major advantages to doing so. First the spa cover that did not use rigid foam to insulate would last longer. Since what always fails in the typical spa cover is the foam, either breaking or getting so saturated that you cannot lift it, a spa cover that did not use foam would tend to last longer.

Second, if the new type of spa cover does not use rigid foam it will also be a lot more friendly to the environment when it does come time to discard it. Less trash, less waste, less land fill, not that is what going green is all about.

Could where you place your spa effect how often you use it? It may not seem so at first but over time the answer is a resounding, Yes. So, you finally bought that spa, now what. Wait, before you pour that cement pad and call out the electrician think about how you are going to use the spa.

First you should know that most of the serious injuries and deaths involving spas are deck mounted spas. If your are thinking about sinking your spa in a deck, turns out leaving it at least bench high can make all the difference as far as safety. Bench high will still make getting in and out of the spa with ease but your guests or children will be far less likely to step into it by accident. So, safety first, make sure the spa stays at least bench high out of the deck and you will be less likely to end up a statistic.

Next, make sure you leave plenty of room around your spa. It is natural to think putting the spa in the corner or up against the house. But in order to keep debris out of your spa and keep the water warm you are going to need to use a spa cover. Once you have the cover off and you are in your spa it will not matter if the spa is in a corner or hanging off the edge of the deck. However when you go to put the cover back on, in order for that to be easy, you need to have easy access around the spa.

If you think about putting the cover on your spa like you would make your bed it will make more sense. If you have your bed shoved into the corner of your room, you may open up more floor area but making the bed, tucking in sheets is going to be a struggle. With your bed you can grab it and pull it away from the wall. You can’t do that with your spa. No matter what kind of cover you decide to use, it will always be easier if you can get around at least three sides of your spa.

I know what you are thinking. I can open my spa cover standing on one side, and when I put it back on I just push it across the spa. And that may be true of your brand new rigid foam spa cover. Unfortunately no rigid foam cover in the history of man has ever stayed light weight. Once the cover begins to get heavy, it will be a lot easier if not necessary to have two people to take the cover off and back on the spa.

One more thing to mention. As humans it is our nature to get by with as little effort as possible. When you first get your spa, you may have plenty of energy you are willing to expend to get into your new toy. As the new wears off however, you will be less likely to exert yourself just to get a little relaxation. If you are using the typical rigid foam cover, you will almost certainly start to open only one side of your spa. You will flop the spa cover halfway open and just use the one side that you can get at. In my humble opinion, this is the beginning of the end.

What I mean by this is as humans when we begin to justify having half as much enjoyment, or telling ourselves we really don’t want to sit in the soothing pulsating jets of the spa we once were so excited to get home to, we begin to have less quality of life. I am convinced that if we make the right choices now we can keep a quality of life well into our twilight years.

You already bought the spa. That was a big expense and given the way spas are built by most companies these days that spa can last you the rest of your life. Where you decide to place your spa can make all the difference between using it later on or deciding to give it away because you just do not use it as much as you used to. The secret is making it easy to use, not just now, but later when the cover starts to get heavy and when you get older and lazier. When the new wears thin, you can still benefit from a dip in the spa.

Back in the annuals of time, Hippocrates, the father of medicine, thought it important enough to include regular spa use as part of the healthy lifestyle. If you want to live a healthy life well into your later years, using that spa is going to be a part of it. And because we are naturally lazy beings, making that easy now will be a big part of how often we use it later. Like brushing your teeth.

If you still have your teeth when you are old, it is largely because you planned for taking care of them when you were young. You made it part of your daily routine by planning on making it easy to do so. You put your tooth brush in the bathroom where you knew you would end up at some point in the morning. To a large degree you now face the same kind of decision in placing your spa.

If you place your spa too far away, walking out to it in your bathing suit seems far less inviting. I heard one person say he placed the spa as far away as his wife was willing to walk in the nude. I would add that she is going to get older and that distance may be less. Make the cover easy to get off and on. Like I said earlier having easy access to at least three sides of the spa will be important but maybe you should consider that eventually you might add a cover lifter of some sort. Leaving space around the spa will make a lifter a lot easier to add later too.

Having the spa partially sunken into the deck can assist in getting the spa cover off and on because as it gets heavier, and it will, and you get older, you will have less distance to move it. Leave room to fasten the cover easily on to the sides of the cabinet. In order to be as safe as possible your cover should be secured to the spa.

If you have already placed your spa and when you read this you realize your spa is not going to be easy to use, move it now. Drain your spa, move it to so you can walk around at least three sides of your spa. If you have shrubs or other landscaping right up to the sides of your spa so you can not walk around it, move them. Back them away from the spa. If you have a privacy fence surrounding the spa, take it down or move it back.

If you got one of those cute little gazebos or tea houses that fit right on to the spa, take it off. Move it to some other place in the yard. Make it a play house for the kids, a shed for the mower, or a tea house or gazebo, but get it off the spa. Either that or eventually you will get to the point where you can not remember the last time you got in the spa. You will get tired of paying to heat the water you are never in and you will drain the spa and shut it down. It will sit there until your wife decides to reclaim her yard and tells you to get rid of it. That will be a shame considering when you first got it, you could not wait to get into it. And your life was better. Do it now, you will thank me later.

How dangerous is an overweight foam Spa Cover? Recently a friend was checking the chemicals in his spa. Rather than attempting removing the entire spa cover, he decided to just lift one side enough to get at the water long enough to get a sample. He bent over and supporting the heavy cover with his left arm while attempting to fill a sampling bottle with water from the spa to check the chemical content, and total alkalinity.

As he leaned over further, the weight of the water logged spa cover dislocated his left shoulder and allowed the cover to hit him on the back knocking him into the spa. He was now face down in the spa with his legs pinned to spa by the weight of the spa cover. His shoulder was dislocated and unlike the Mel Gibson character in Lethal Weapon, he was in agony because of a the pain. He tried to move but could not budge the weight of the waterlogged cover.

He began to choke as he swallowed spa water and tried to rise up but could barely get his head out of the water. With what could have been his last breath, he screamed for help. Fortunately he had left the door from the house to the deck open. His daughter and her boy friend heard the commotion and looked out to see his legs sticking out of the spa cover.

His daughter and her boy friend were able to lift the cover off of his legs. His daughters boy friend jumped into the hot tub and pulled him up from the water. They took him to the emergency room where they put his shoulder back in place and treated him for shock.

Women who have experienced both child birth and a dislocated shoulder report dislocating a shoulder as more intense than childbirth. I do not know about that, I suspect that with child birth you can prepare mentally for the pain and with the shoulder it comes at you unexpectedly. But either way I think we can agree the pain is excruciating.

My friend had owned a hot tub for 12 years and had replaced 3 conventional rigid foam core spa covers. While the life on the foam covers had averaged from 2 to 4 years, regardless of manufactures claims, all the covers became waterlogged. He has since bought a Spa Cover that uses air chambers to insulate rather than rigid foam. He is certain that the air filled spa cover will not try to kill him as the other foam cover did.

A lady friend of ours and her husband were in the hot tub with their rigid foam spa lid propped up against the wall. A gust of wind hit the spa cover and it suddenly fell hitting her husband on the head. The blow was hard enough to push them both under the water. Fortunately they were not trapped and they both recovered quickly, or so they thought.

A couple of days later the left side of her husbands face suddenly went DEAD. He had no feeling, sensation or movement. Naturally they both were quite frightened and thought he had suffered a stroke. They did exactly what any of us would do and rushed immediately to the hospital. The doctor diagnosed him with Bells Palsy which can be caused by stress and or trauma like a heavy spa cover hitting him on the head. He later made a full recovery. He was extremely lucky.

Here is something you will never hear from a foam spa cover dealer. Every year people are injured by foam hot tub covers. Most of the injuries have come from a gust of wind blowing the heavy foam cover onto people as they use their spa. Sometimes people attempting to carefully maneuver a saturated foam cover off their spa, have lost their grip and had the hard foam cover slam down breaking the arch of their foot.

According to the U.S. Consumer Product Safety Commission people have even been drowned when they have become trapped under heavy foam covers. Maybe now is a good time to search for a better spa cover. With the World Wide Web, you can literally have the world to shop from. Do you really want to risk injury or death trying to use your spa?

Where is my spa cover? Ever have to ask yourself this question after a wind storm? I have had people tell me they have found their cover a quarter mile from their home. I do not know how they knew it was their cover. Maybe in some parts of the country people write things on their spa covers to help them recover them after a storm. I suppose you could write, If Found Please Call, on the bottom. Maybe, Hope This Spa Cover Did Not Land On Your Sister.

Personally I think it might be time for a different type of spa cover. I found a posting on a spa cover dealers website claiming that they had several covers that made it through Hurricane Katrina. That is a little like saying there were some calvary survivors after Custers last stand. There is a big difference between having some going undamaged and having no losses.

The question to ask is are they selling anything different? So far I have found stronger straps as their solution. Well you could build a solid roof that attaches to the spa but in case you did not notice solid roofs were flying right off houses. The answer is not stronger tie downs for the wing you use to cover your spa but get rid of the wing.

Find a design that does not offer a rigid surface for the wind to lift on. The reason rigid foam spa covers fly is that they make a good wing. Our armed services fly planes with less aerodynamics than the typical rigid foam spa cover.

What causes a spa cover to fly? When wind comes at the spa, some of it hits the side of the cabinet and has to go around. As the air is pushed around the spa it some of it goes up over. As it breaks over the top of the rigid foam cover it starts a little ripple or swirl action that begins to suck upward on the rigid surface. Like when your riding in a convertible, if you have hair like I used to, it does not blow backward like you expect but forward because of the windshield diverting the air flow. If you had no windshield your hair would be blown straight back. This swirl action pulls the foam cover up off the spa.

It does not need to move it very much, just enough to create enough of a gap for some of the air to get under the cover. The second reason rigid foam spa covers fly is they have a nice air space between them and the water surface they are supposed to be keeping warm. Once air starts to flood into this air space it creates pressure. The air rushing in can not push down on the water so it takes the only thing it can move, the spa cover. Once this action starts it is only a matter of what velocity is required before lift off occurs. The first movement of the flying spa cover is straight up.

The pressure in the space between the water of the spa and the bottom of the cover pops the cover straight up. It takes a lot less force than you might think because it is lifting on the entire bottom area of the rigid foam cover at once. Even a saturated rigid foam spa cover that is too heavy for one person to lift will fly when the air is pushing on the entire bottom surface. Once a heavy spa cover gets airborne watch out because anything it runs into is going to get damaged.

So are these spa cover dealers offing anything different? Are they offering a spa cover that is not designed like a wing? Are they selling a spa cover that does not require straps and truck ratchets to secure it to the spa? I propose looking for a different kind of spa cover.

The internet has put the world at your finger tips. Instead of settling for the same old thing, shop the web for a design that makes sense. Look for a design that does not use a rigid foam board resting across the top of the spa. A better design would rest right on the water surface first because the water is what you intend to keep warm and second because this would remove the void that would build up pressure to pop the cover off. If the flexible and dome shaped rather than flat and rigid it would resist lift and deflect even the strongest winds. If you are tired of worrying about your spa cover every time the wind blows, you owe it to yourself to find a better spa cover.

If you need a new spa cover because your old foam cover was damaged by the elements, consider something different. The typical rigid foam filled hot tub cover covered with vinyl is doomed to end up heavy or broken no matter how well you treat it.No matter what you treat it with all vinyl is rated by hours outdoors. Really top quality marine grade vinyl is rated for 1500 hours outdoors. That equates to about one hundred days of sunshine. I know what you are thinking, why would anybody put vinyl on something that is meant to be used outside? But that is not even the most common failure of the typical rigid foam filled spa cover.

What generally happens before the vinyl falls apart is that the foam gets so heavy you can not lift your spa cover by yourself. No matter how it is wrapped and sealed inside the cover, the foam fills with water. What happens is the little air spaces in the foam that are supposed to help the foam insulate your spa get filled up moisture. Here is a tip why the whole foam cover is doomed, if you never put the cover on your spa, it would never get heavy. If you just took a brand new spa cover out and put it on your picnic table instead of your spa, the vinyl would fall apart before the cover got heavy.

Why? Because the hot spa water is way below the bottom of the rigid foam spa cover. Some of that warm spa water turns to steam and rises up. Steam molecules are smaller than water. The steam works its way into the little crevices and spaces in the foam where it condenses back into liquid. If you live in an area that gets snow, the snow will land on the saturated foam and freeze the water inside it.

How? because just as heat rises, cold sinks. When it comes in direct contact with the foam it freezes the moisture. The warm spa water is not in direct contact with the bottom of the spa cover so it is in a loosing battle trying to beat the cold. The steam rises from the water, hits the bottom of the now frozen spa cover, condenses and falls back into the water below working like a radiator to actually cool the water.

You may look out at the snow piled on your frozen spa cover and think you have great insulation. But you would be wrong. Snow sits perfectly on a frozen pond too. It does not mean the pond water is still warm. So why does anybody still sell rigid foam covers? Well two reasons really. First, it has been the standard of the industry for nearly thirty years. When the acrylic spa began to be sold in the states, it needed to be covered with something to keep the debris out and to assist in keeping the water warm. Foam boards covered with vinyl was cheap and since everybody was selling the same thing it was all they needed to offer. Remember definition of insanity is to do the same thing over and over expecting a different outcome.

The second reason is worse in my opinion. Spa dealers know that the cover they are sending you home with will need to be replaced again because it will end up the same as the one you are replacing now. They know that like clockwork every couple years you are going to need to get another cover if you intend on using your spa on a regular basis.

So what are your choices? Thanks to the internet you now have the world at your finger tips. Look on line for a different kind of spa cover. Find a spa cover that is not covered with vinyl that is rated by hours if your spa is outdoors. There are Spa Covers available factory direct that do not use rigid foam that is just going to end up to heavy to lift. If you plan on using your spa for the rest of your life like I do, you owe it to yourself to get a better kind of spa cover.

We get a lot of inquiries from spa owners that are replacing their cover due to hail damage. Traditional rigid foam covers get hammered by hail because they do not absorb impact very well. The foam inside the cover is rigid enough to form a bridge over the spa, however it does not allow for impacts.

Branches, falling debris and large hail will pound the foam with enough force to damage or break the cover. As people who live in areas of heavy hail storms know, anything rigid is going to take a pounding. If you have been replacing covers because of this type of damage you have to ask yourself if there is some better way of covering your spa.

Let’s look at a few options. First you could opt for an Aluminum cover. This would be stronger than a foam filled spa cover, but it could be a little unwieldy because a one piece cover that size would need significant storage space. Not to mention even the slightest wind would make it a very large destructive frisbee.

Another option would be to go with a roll cover. These are very strong and essentially work like a portion of deck that you roll over the spa. The down side is they tend to collect small debris and allow it to get into the spa. Though strong they also offer little in the way of insulation.

Then you could choose to go for a reinforced rigid foam cover. One of the latest developments in this area is to have the foam glued to a board for strength. This would of course handle all but the most devastating hail storm. Only two caveats on this type of spa cover, it still will fly in a wind storm and with the added mass it will do serious damage to anything it lands on and it will still eventually become saturated. Once it is saturated a cover like this will be a four person job to open the spa.

The solution to this would be something that is able to give or absorb impacts. In Hollywood when a stunt man falls from a great height, he wants to land on something that will absorb his impact like an air bag. The air bag principle would work as a spa cover to guard against impact damage. Just like the stunt man landing on a cushion of air the same would be true of debris, branches and even severe hail.

Now the stunt air bag is designed to open and release air when it catches the stunt person so please do not use your air filled hot tub cover this way. However if your house is on fire and you have to jump out of the window aiming for the large air bag would probably save your life. I should note here that jumping on any spa cover would not be covered by the warranty.

No matter how fierce the storm or the hail stone an air filled spa cover will give or catch it without damage. We have tested them by driving golf balls into them at close range, dropping bowling balls on them and just having them in use around the country in areas that get severe hail storms. Before you replace another rigid foam spa cover because it broke shop online for a spa cover that will not end up the same way.

Heavy Broken Spa Covers Waste Energy. I saw this advertised on line the other day. When I went to check out the guys website, guess what he’s selling? Rigid foam spa covers that will end up heavy or broken, usually within two years. To me this is like a coat salesman telling you wet wind breakers won’t keep you warm, here you need to buy this new dry wind breaker and go play outside in the rain.

Instead of selling you something that won’t get heavy or broken he keeps selling the same thing, hoping you won’t notice. If you have had to replace a spa cover because it got heavy, maybe the question you should ask before you buy the next one is, Why?

What causes the foam spa cover to get heavy is that it traps moisture inside. Rigid foam board is used in lots of insulation applications. It can be used around refrigeration storage areas like in a super market. Layers of foam board can insulate the cool storage area while the customer area can be kept comfortably warm. But in this type of installation the foam is not subjected to hot moist air. As long as the foam stays dry it has a predictable insulation value. But if the foam were to have moisture in it instead of the little air spaces it uses to insulate, it would have no insulation value at all.

If you wanted to produce the perfect environment for a rigid foam board to become saturated it would be to put it over a source of warm, humid, steam. You couldn’t get water into it faster even if you tied it to the bottom of your swimming pool. Why? Because water molecules are bigger than steam molecules. Steam can get into smaller spaces faster than water. And once the steam cools, it condenses back into water, displacing air in the foam as it does.

Long before you notice the spa cover getting heavy, moisture has begun to replace the air spaces in your cover. When it does, the little insulation value that cover might have had, goes down dramatically. From whatever it may have been when you first put it on your spa it has gone down to as much insulation as a wet piece of plywood by the time you actually notice it got heavy.

You might get fooled into thinking that it is still insulating well because snow won’t melt off it. Unfortunately, you would be wrong. Snow won’t melt off a frozen pond either but it doesn’t mean the ice is insulating the water. When snow falls on a saturated foam spa cover, it freezes the moisture in the cover because it is laying directly on the cover. The water of your spa is never in contact with the foam since the foam is resting way up on top of the acrylic of the spa, usually about a foot above the water surface. What’s happening is the warm spa water is evaporating into steam. That steam is rising, because that is what heat does, until it hits the bottom of the frozen spa cover. Then the steam cools and turns back into water. The water, now cooled, falls, because that’s what cold does, back into the warm spa water, cooling it off.

So if you wanted to invent a radiator to cool off your warm spa water this would be the perfect design. Put a block of frozen foam over the water. Load it up with snow so it will keep the spa cover frozen and stand back and watch the power meter spin. Instead of buying another rigid foam spa cover that will positively end up like the one you are replacing now, shop online for one that is designed better. Look for a spa cover that will insulate the water from the water surface, without rigid foam.

Did you buy a cover lifter for your spa and then find out that it doesn’t really help when the foam gets saturated? Your not alone. The truth is every rigid foam spa cover eventually ends up either broken or saturated and heavy.

Years ago there was a woman who because of a severe back injury needed to get into her spa. Her doctor had instructed her not to lift more than ten pounds and that she should get spa therapy every day. Looking at her own spa cover she realized she would have to think of a better way. Necessity being the mother of invention she set out to build something she could use herself.

What she came up with was a design that was both easy to use and durable. Initially she would have been happy with something that kept the leaves out of the spa that she could manage herself. Insulation was less important than ease of use. However testing of the new design showed the added bonus of better insulation than the typical rigid foam spa covers. The new design allowed for the cover to rest on the surface of the water so it drastically reduced heat loss from evaporation. With less evaporation the chemicals used to keep the water clear and clean stayed more consistent. With the cover laying right on the water insulation began at the water surface which is important since that is what you’re trying to keep warm.

Using the water to support the spa cover allowed the new design to be able to withstand more weight as in snow loads, without collapse as rigid hot tub covers do. Since it uses air to insulate rather than the foam found in typical spa covers, the improved spa cover could absorb impact better too. So in areas that get brutal hail storms, her spa cover would not be damaged while traditional spa covers were pummeled.

The new spa cover design created a natural dome shape while on the spa causing wind to blow over without creating lift. If you live in an area that gets strong winds you already know that rigid foam spa covers will fly. I have seen people try all kinds of things to keep their foam covers on from cement blocks to heavy webbing straps.

Armed with this knowledge she figured that she was not the only spa owner that was sick of heavy spa covers, so she patented the idea and began to market her new spa cover. Unfortunately, this was in the days before the internet. Getting the word out required actually getting out and meeting people. She traveled the country doing home shows and fairs. She travelled to spa dealers all over the country trying to convince them to sell her cover.

Most spa dealers were not interested. They make a lot of money selling a cover that needs to be replaced every couple years. Others did not want to dedicate any of their limited floor space to show just a cover, especially one that cost more to them than the cheap covers made overseas.

Fortunately, thanks to the world wide web, you can research for yourself and find out all about this innovative design from the comfort of your home. Available right from the factory you can order a cover custom made for your spa. If your tired of replacing your spa cover with the same old thing, look for the next generation in spa covers. The air filled cover that insulates better and lasts longer than any rigid foam spa cover. The cover designed by a woman so she could use her spa by herself.

Every week we get customers calling to order a new cover for a spa they just got for free. Spas and Hot Tubs are expensive. They run in the thousands of dollars. When you first get your new spa you use it everyday. You invite your friends over to enjoy your new toy. You go to work with a smile on your face because you know that no matter what hits you, by tonight you’ll be soaking it away.

Then why, if this is so great, would anyone end up giving it away? And as it is leaving say, “The spa works great it just needs a new cover.” I hear it all the time. To me this is equivalent to giving away your car because it needs a new set of tires. After Years of hearing these words I began to investigate the source of this change.

It happens slowly, but see if any of this sounds familiar. When you first get the spa you use it religiously. It becomes a part of your regular routine. Over time though it becomes a little bit more of a struggle. The reason is that cover that came with the spa begins to get heavy. It does it so slowly that you don’t even notice. As you begin to struggle with it you might think to yourself, “I must be tired.” Eventually you’ll wait a few days between using it and when you go to use it again you realize that what was a fairly easy operation now requires two people and real effort.

What do you do? Most people get in their car and go back to the place they bought their spa from. What does the spa dealer say? “Well, yes the cover that came with the spa is our low end model. They always get saturated. But we have this new high end model that has a special wrapper, a sealed moisture barrier. Buy this one and your trouble will be gone.” You may even head home with a spa cover lifter because it all makes sense. Trouble is that even the new special cover will get heavy too. Too heavy even for the lifter.

In most cases you have had your spa for a few years by now. The struggle to get into it has outweighed the value of the stress relieved. After a rate increase from the local power company you shut if off and drain it. You probably can’t remember the last time you were in it anyway. It becomes a place to stack stuff. Eventually the cover caves in and you decide its time to reclaim this part of the yard. You give it away or sell it cheap just to get it out of the yard. As it is leaving with its new owner you say these words, “It works great, it just needs a new cover!”

Now if you are the benefactor of such a statement, let me give you a heads up. You too will end up in the same situation unless you find a way to break the cycle of covers that get heavy. If you are the spa owner that is just about to give up think about this, the definition of insanity is to do the same thing over and over expecting to get different results. Don’t let a cover be the reason you give up something you paid hard earned money for and once enjoyed so much. Look for a different kind of spa cover. I once had a lady order a new cover from me and she was excited to show it off to her neighbor that had the same heavy cover challenge. But in before she could show her friend the new cover, the neighbor had punched holes in the bottom of her spa, filled it with dirt and made it a planter. A very expensive planter, all for the want of a better spa cover.

These days most spa dealers offer a rigid foam cover with a taper. The theory being that the sloped shape will help the foam shed rain and moisture so it won’t get saturated.
Does this work? Well, it does help the spa cover shed rain. However that is not what causes the foam to saturate. You can prove this to yourself by performing a simple test. Buy a new rigid foam spa cover with as big a taper as you can find. Bring it home and carefully weigh it. A hanging weight will probably be most accurate and simple to read. Record the weight and date it. Put it on your spa and then to be absolutely sure that no rain or outside moisture gets to your new hot tub cover, put a tarp over the whole spa, cover and all.

If you weigh the cover once a week and record it with the date, you will know exactly when the cover begins to saturate. You may not notice it at first but if you keep records on the weight, the scale won’t lie. If you are keeping all the rain water totally away from the spa, why is it getting heavy?

The fact is that moisture does not enter the foam from outside. What gets into the foam is the steam from underneath the spa cover. The steam particles are much smaller than rain. the steam can get through the smallest hole. Since the warm water of the spa is a constant source of evaporating water it will always work its way into the spaces in the foam. So in fact, the only way to avoid having any rigid foam spa cover saturate is to never put it on your spa or never put water in your spa.

Other than making the spa cover more difficult to use, is saturation bad? Yes, in a foam spa cover, it is not the foam itself that has insulation value but the air spaces in the foam. Once those tiny air spaces are filled with water, the spa cover has as much insulation value as a wet piece of plywood. When the foam spa cover begins to soak up the moisture, the little insulation it did offer goes down dramatically.

So what is the solution? First, you could buy two or three hot tub covers. Always have one or two drying out in your garage. Once the foam spa cover is not over the evaporating water, it will begin to dry out , become light again. You can rotate it back on to the hot tub. A light spa cover won’t rip your bar lifter off the sides of your spa and you should be able to keep using the spa easily. Since all vinyl is rated by hours outdoors, you will still need to be buying new covers to replace the ones that fall apart.

The other choice would be to find a spa cover that does not use rigid foam.