The Ultimate Guide to Hot Tub Covers: Types, Costs and What to Look For

Last updated: September 2026

It probably doesn’t come as a shock that the cover is a key part of your hot tub! No cover means massive heat loss and expensive electricity bills. A bad or damaged cover, same again. And a cheap cover usually ends up costing you more in the long run.

So in this guide we’ll look at why the cover matters so much, the different types available now, what to look for when you buy one, what they cost, and how to measure, especially if you’ve built your own tub.

Why the cover matters so much

A hot tub is a big volume of hot water sitting outside, and a lot of the heat it loses goes out of the top. A good cover:

• Keeps the heat in. That makes it one of the biggest savings on your running costs. Together with good insulation (see DIY hot tub insulation), it’s the basis of an efficient tub. If you want to see how far running costs can come down, read How I reduced the running costs of my hot tub by 66%.
• Stops evaporation, so you’re topping up less water and fewer chemicals.
• Keeps debris out: leaves, rain, pollen and the odd frog.
• Keeps children and pets safe, as long as it’s properly secured.
• Helps in winter. A good cover is your first line of defence against freezing (see winterizing your hot tub).

Cover safety first

• Don’t sit, stand or lie on your hot tub cover. A standard foam cover won’t support your weight. Even resting your elbows on it can dent the foam. Some manufacturers claim their standard covers are fine to stand on. Honestly, it’s not worth the risk. It also sets a precedent: if your kids can walk on your cover, they’ll assume they can walk on all of them. That’s how kids think, and it’s a huge risk. The exception is a proper walk-on cover designed for it (more below).
• Keep children out from under the cover. I know it’s tempting for kids to play under there with the lights on. Just don’t let them. It’s so dangerous it isn’t worth the risk.
• Secure it. I’ll be honest here. My cover has securing tabs, but I don’t use them. In my case, the cover is so big and heavy there’s no way the kids can move it (and neither can the wife, for what it’s worth). But smaller tubs should definitely have the cover locked down, both for safety and to keep it on in strong winds. You don’t want to be knocking on the neighbours’ door asking for your hot tub cover back! The US Consumer Product Safety Commission recommends a locked safety cover when the spa isn’t in use.
• Check it often for damage or early wear. A damaged cover takes on water, gets heavy and hard to move, and stops insulating properly.

In the USA, you’ll see “ASTM F1346” on some covers. It’s the standard for safety covers for pools, spas and hot tubs, with tests for load-bearing, gaps a child could slip through and water pooling on top. Some local codes require it, so if you’re building an in-ground tub in the USA, ask your inspector.

Types of hot tub cover

Type	What it is	Good for	Watch out for	Typical US price*
Hard (foam core) cover	Tapered foam panels in a sealed vapour barrier, wrapped in vinyl, folding on a centre hinge	Most heated tubs. The best insulation for the money	Heavy on big tubs (use a lifter). Foam can waterlog if the barrier is damaged	$250–$1,000
Walk-on cover	Reinforced rigid panels designed to take weight	Flush, in-ground and deck-inset tubs, and homes with young children	Heavier and dearer. Check what load it’s rated for	$700–$1,500
Automated cover	Motorised covers that open and close for you. Covana‘s, for example, are fully automated and open with a turn of a key	Luxury installs, large tubs and swim spas, and anyone who can’t lift a heavy cover	Cost, space, and fitting to a custom tub	$2,000–$12,000
Soft cover	Vinyl stretched over the top, sometimes over an air pillow	Unheated tubs, or as a temporary cover	Very little insulation. Rain pools on top	$50–$200
Floating thermal blanket	A thin foam or bubble layer that floats on the water under your main cover	Extra heat retention, and taking the steam and chemicals off the underside of your main cover	An extra thing to lift out. Not a safety cover	$30–$150
Inflatable lid	The air-filled lid that comes with inflatable tubs	Inflatable tubs	Limited insulation. Punctures	$30–$110

*Price ranges from Angi’s 2026 hot tub cover cost guide. Angi puts the US national average at around $300.

You’ll also come across aluminium covers (a foam core sandwiched between aluminium sheets). They insulate less well than a good foam cover, and I couldn’t find current, reliable pricing for them, so they’re not in the table.

What to look for in a hard cover

For most people, this is the cover you’ll buy. These are the things that separate a good one from a cheap one:

• Foam density. Covers are usually sold as 1lb, 1.5lb or 2lb foam (pounds per cubic foot). 1.5lb is the most popular. 2lb is stronger and better for big tubs, cold climates and heavy snow. 1lb is the budget option with a shorter life.
• Thickness and taper. Covers are thicker in the middle and slope down to the edges so rain runs off. 4″–2″ is standard, and 5″–3″ or 6″–4″ is better in cold climates.
• A sealed vapour barrier around each foam panel. This is what stops the foam soaking up steam from the tub. Once foam gets waterlogged, it’s heavy and useless.
• Steel reinforcing channels along the fold, so the cover doesn’t sag in the middle.
• A heat seal along the hinge. The fold is where a lot of heat escapes.
• Marine-grade vinyl with UV and mildew inhibitors, and double stitching at the stress points.
• A skirt that hangs down over the edge of the tub, and locking straps.
• A warranty that covers waterlogging, not just the stitching.

Let’s take a $200 example. It’ll be thin, made of low-grade foam, and single-wrapped, so eventually it will let water in. A wet cover performs worse, which then costs you more to heat. You’ll often only get a one-year warranty too. That says a lot: if the manufacturer only expects it to last a year, it’s close to a disposable item. I’d still rather spend more once than buy a cheap cover every couple of years.

How much does a hot tub cover cost?

• USA: Angi puts most covers between $200 and $1,500, with an average of around $300. Hard covers are typically $250–$1,000, walk-on covers $700–$1,500 and automated systems $2,000–$12,000. A cover lifter adds around $100–$300.
• UK: I couldn’t find an independent UK price survey, but UK retailers list standard replacement covers from about £299 to £399 upwards, depending on size and spec. Custom sizes and shapes cost more.

Custom-made covers for DIY tubs cost more than off-the-shelf sizes. That’s one reason I’d think about the cover when you design the tub (more on that below).

How to measure for a replacement cover

If your current cover still fits well, you can measure it. But the Canadian Spa Company points out that old covers can stretch, warp or shrink, so it’s safer to measure the tub itself.

Length and width

Measure the length and width at the widest points, staying away from the rounded or cut corners.

If you’re measuring the tub itself, measure to and from the outside edge of the acrylic, so the skirt will hang straight down.

Rounded corners

Measure the corner radius. Use a slightly smaller radius measurement to give the cover’s corner a little extra slack.

On the tub itself, measure where the measuring device first touches the side of the spa.

Don’t forget

• Skirt length: how far the vinyl flap should hang down the side.
• Fold direction: which way the hinge should run, so the cover folds towards your lifter or away from the steps.
• Strap positions, so the clips line up with the cabinet or your surround.

Covers for DIY and in-ground hot tubs

This is where a lot of builders come unstuck, because an off-the-shelf cover assumes an off-the-shelf tub.

• Measure the opening, not the water. The cover needs to sit on your coping or surround, so measure where it’ll rest, and agree with the maker whether you want a skirt or a flush fit.
• Flush and in-ground tubs suit walk-on covers, because people will inevitably step on them. Plan for somewhere to put the cover when it’s off, too.
• Design with the cover in mind. If you’re still planning, a square or rectangular tub near a standard cover size is much easier (and cheaper) to cover than an unusual shape. Plan the space for a lifter behind it, too.

Custom covers

If you need a cover made to measure for your own build, you can request a quote using the form below.

What about a DIY cover?

Plenty of the DIY covers you’ll see online are made from a sheet of insulation board, wrapped in pallet wrap and stuck to a bit of hardboard. They just don’t look good, and they don’t last, so I’d steer clear of those.

But I’ve seen customers do a proper job of it. Niel built a hard-top cover with a foam core, fibreglass and epoxy that genuinely looks the part, and it cost a fraction of a custom walk-on cover. If you’re handy and your tub is an unusual size, it can make sense. Have a read of How to make a DIY hot tub cover before you decide.

Cover lifters

A decent cover on a big tub is heavy. As I said, mine is too heavy for the kids (or the wife) to move. A cover lifter makes a huge difference to how often you’ll actually use the tub, and it stops the cover being dragged around, which is what wrecks hinges and skirts. Angi puts lifters at around $100–$300. Check you’ve got the clearance behind the tub before you buy one.

When is it time to replace your cover?

Most new hot tubs come with a cover, and quality varies. Buyers tend to focus on the jets and the seats, not the cover’s thermal efficiency, so some cheaper tubs come with covers that won’t last. Signs yours is on the way out:

• It’s much heavier than it used to be. The foam is waterlogged.
• It sags in the middle, or water pools on top.
• The vinyl is cracked, split or brittle, or the hinge has torn.
• You can see steam escaping, or it smells musty inside.
• Your heater is running more than it used to (see hot tub heating and energy efficiency).

Once foam is waterlogged, you can’t really restore it. You can make a good cover last a lot longer, though. My hot tub cover maintenance guide covers cleaning, conditioning and drying it out, and A guide to removing hot tub cover stains helps with marks on the vinyl. Keeping your water balanced helps too, as harsh chemistry attacks the underside (see the ultimate guide to balancing chemicals).

Planning your own build?

If you’re building a tub, the cover is far easier to get right at the design stage. My DIY hot tub plans come in standard sizes with full CAD drawings, the plumbing layout and a parts list. If you want something bespoke, try the free Tub & Pool Designer Pro software, and I can turn your design into architectural CAD and a 3D plumbing design, with the coping and cover dimensions worked out.

FAQs

How long does a hot tub cover last?

It depends on quality, climate and care. A good foam cover that’s looked after lasts far longer than a cheap one. Replace it when it gets noticeably heavier, sags or splits, as those are signs the foam has taken on water.

What thickness of hot tub cover should I get?

A 4″–2″ taper is standard. In cold climates or with heavy snow, go for 5″–3″ or thicker, with 1.5lb or 2lb foam.

Can you stand on a hot tub cover?

Not a standard foam cover. Only a cover specifically designed and rated as walk-on should take any weight, and even then, don’t let children play on it.

Why is my hot tub cover so heavy?

Usually because the foam has absorbed water through a damaged vapour barrier. A waterlogged cover insulates badly and is hard to dry out properly, so it’s normally time to replace it.

Is a floating thermal blanket worth it?

It can be. It’s a cheap extra layer that sits on the water under your main cover, reducing heat loss and protecting the underside of the main cover from steam and chemicals. It isn’t a safety cover, though.

Can I make my own hot tub cover?

Yes, if you do it properly. A foam core with a waterproof, rigid skin can work well, but a sheet of insulation in plastic wrap won’t. See How to make a DIY hot tub cover.

Got a question about covers, or a cover you love (or hate)? Let me know in the comments below. I read them all.

Cheers,
Andi

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Hi, Andi here. I own Buildahottub.com and also write all of the articles and info pages on the site. Some years back now, I built my own hot tub but struggled to find the information I needed. So, once my tub was complete, I started this website to help others in their own pursuit of hot tub and plunge pools DIY building information.

Fast forward to 2025, I've helped over 1400+ DIY customers just like you all over the world build hot tubs and pools. Have a good look around the site, there are lots of resources here. Please do get in touch if I can help you. - Cheers, Andi