Hot Tub Enclosure Guide: Is a Spa Dome Worth It?

A hot tub on a crisp winter evening sounds idyllic. The reality, in a British garden, often involves a sprint across the patio in your dressing gown, a wrestle with a heavy, dripping lid and a face full of drizzle. A hot tub enclosure changes all that, but is a full spa dome really worth the investment?

Let's look at what a spa dome actually does, why it matters even more for a hot tub than for a pool, and how it compares with a gazebo.

Why Enclose a Hot Tub at All?

Most people buy a hot tub to use it all year round, not just on the handful of balmy summer evenings we get. Yet the weather has a habit of getting in the way. Wind whips the heat off your shoulders, rain turns the steps slippy, and leaves find their way into the water whatever you do.

An enclosure puts a proper, weatherproof structure around the tub. You get shelter, privacy and a space that feels like part of the house rather than an expedition into the garden. Rain rattling on the dome while you're sitting in hot water is, frankly, one of life's small pleasures.

Why Does Heat Retention Matter More for a Hot Tub?

This is the big one. Hot tubs run at higher temperatures than swimming pools, so the gap between the water and the air around it is bigger. And the bigger that gap, the more heat the water is trying to lose, especially when a cold breeze is blowing across the surface.

That's why heat retention matters even more for a hot tub enclosure than it does for a pool enclosure. A spa dome keeps the wind off the water and holds a sheltered pocket of air around the tub, so you're not heating water only for the British weather to carry the warmth away.

We won't throw savings percentages at you, because how much of a difference it makes depends on your tub, its insulation, your garden and how you use it. What we can say is that keeping the wind and rain off a hot tub is exactly what an enclosure is designed to do, and it makes getting in and out a lot more comfortable too.

What Is a Spa Dome?

A spa dome is a curved, freestanding enclosure made from an aluminium frame and polycarbonate panels, built to sit over and around a hot tub. Our made-to-measure spa domes are made to order after a site survey and professionally installed by our team. We offer two main designs.

The Orlando: A Dome That Rotates

The Orlando spa dome sits on a circular track, and its clever party trick is that the whole dome rotates in either direction. You choose exactly how open or closed it is: a small gap for fresh air, a wider opening for a stargazing soak, or fully closed when the weather turns.

• Two sizes: small (4 m internal width) and large (5 m external width)
• Compact polycarbonate glazing in clear, structured or smoky finishes
• A choice of frame and track colours
• Needs a solid, flat base, ideally concrete or ceramic tiles
• At the time of writing, guide prices start from £21,136 (4 m) and £25,987 (5 m)

It's the perfect choice if you want your hot tub sheltered and cosy, with the flexibility to open it up on a nice day.

The Sunhouse: A Garden Room With a Spa in It

If you want more space, the Sunhouse spa dome stretches the idea into a generous oval, made from two half-domes joined by straight segments. There's room for the hot tub plus loungers, a side table and a stack of towels that don't get rained on.

• Two sizes: Spa Sunhouse (6 x 4 m) and Spa Grand Sunhouse (8 x 5 m)
• A sliding roof canopy so you can let in fresh air and sunshine on warmer days
• Sliding doors on both sides for easy access
• Polycarbonate panels in clear, structured or smoky finishes
• At the time of writing, guide prices start from £28,255 (Standard) and £37,632 (Grand)

Think of it less as a hot tub cover and more as your own private wellness space.

Can a Pool Enclosure Work Over a Hot Tub?

Sometimes, yes. Our circular Orient Dome is designed for both swimming pools and hot tubs. It's larger than a dedicated spa dome, so it's usually one to consider if you have a bigger space or want a showpiece feature.

Spa Dome or Hot Tub Gazebo: Which Is Better?

It depends on what you want from the space, and both have their place.

A timber gazebo or cabin gives you a roof overhead and a lovely garden feature. Our hot tub gazebos range currently includes a log cabin with a veranda that's designed with a hot tub in mind. It's a more affordable route to a covered hot tub, and it suits people who love the look of timber.

A spa dome does a different job:

• It encloses the tub. Rather than just a roof, you get a closed structure that keeps wind and rain off the water and off you.
• It holds the heat around you. For a hot tub, keeping the cold air out matters, and that's where a closed dome comes into its own.
• It lets the light in. Polycarbonate panels keep the space bright, so it doesn't feel like sitting in a shed.
• It opens up when you want. Rotate the Orlando or slide back the Sunhouse roof on sunny days.
• It's made for you. Each dome is made to order and installed by our team, rather than assembled over a weekend.

In short, a gazebo is a covered spot for your hot tub. A spa dome is a proper hot tub enclosure.

What Should You Check Before Buying a Spa Dome?

A little planning now will save headaches later.

Is Your Base Solid and Level?

The ground must be flat and able to take the weight. The Orlando page recommends a solid base such as concrete or ceramic tiles. If you're not sure about yours, we'll look at it during the site survey.

How Much Space Do You Have?

Measure the hot tub and the area around it. Think about whether you just want the tub covered (Orlando) or a bigger space with room to relax (Sunhouse).

How Will You Keep It Fresh?

Hot water and a closed dome mean warm, moist air. Open a gap in the Orlando or slide back the Sunhouse roof to let fresh air through. Our enclosures use anti-drip polycarbonate, which means fewer drips, although no polycarbonate can be completely drip-free, especially in winter.

Do You Need Planning Permission?

A spa dome is a structure, so it's worth checking with your local planning authority before you order, particularly if your property is listed or in a designated area.

How Long Will It Take?

Every dome is made to order. Our product pages currently show a delivery time of 10 to 12 weeks, so if you're dreaming of a winter soak, get the ball rolling early.

So, Is a Spa Dome Worth It?

A spa dome is likely to be worth it if:

• You want to use your hot tub all year round, not just when the weather behaves
• You want to keep the heat around the tub, where it belongs
• You'd like privacy and shelter without losing the light
• You want something made to order, professionally installed and supported afterwards

A gazebo may suit you better if:

• You mainly want a roof over the tub and love the look of timber
• You're working to a tighter budget

Frequently Asked Questions

Does a spa dome keep a hot tub warmer?

A spa dome keeps wind and rain off the water and holds a sheltered pocket of air around the tub, which helps limit heat loss. We don't quote savings figures, because results depend on your tub and garden.

Should I still use my hot tub cover under a dome?

Check your hot tub manufacturer's guidance. A dome makes getting in and out far more pleasant, but the tub's own cover and its insulation are a separate matter.

Can I get a motorised spa dome?

No. According to our product pages, motorised operation isn't available on the Orlando or the Sunhouse. The Orlando simply rotates by hand on its circular track, and the Sunhouse has a sliding roof and doors.

How do I clean a spa dome?

Simply spray the polycarbonate panels with water rather than wiping them, as wiping can scratch the surface. The aluminium frame can be wiped if needed.

Ready to Make Your Hot Tub an All-Year Retreat?

Get in touch with your hot tub's size and a few photos of the space, or call us free on 0800 8611 679. We'll help you choose between the Orlando and the Sunhouse and arrange your site survey.