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Heavy-duty The Thoresby 5m X 3m Premium Insulated Garden Room With A 80% Price Cut [y6idFc3u]

$130.99 $419.99 -69%

The 5m x 3m Thoresby Insulated Garden RoomThe exterior of the Thoresby showcases a modern interpretation of the classic apex design, complemented by a welcoming sheltered veranda at the front. Inside, the space is open and breezy, with a lofty ceilin

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Heavy-duty The Thoresby 5m X 3m Premium Insulated Garden Room With A 80% Price Cut [y6idFc3u]

The 5m x 3m Thoresby Insulated Garden Room

The exterior of the Thoresby showcases a modern interpretation of the classic apex design, complemented by a welcoming sheltered veranda at the front. Inside, the space is open and breezy, with a lofty ceiling providing an ideal backdrop for a striking feature light.

Benefits of an Insulated Garden Room

Insulated garden rooms are a cost-effective way to create versatile extra living space which is easily customisable to your needs. Because a garden room is separate from your home, it offers a measure of peace and privacy that’s perfect for uses like a garden office, a home gym, an art studio, or a relaxing retreat from which to enjoy your garden.

Thanks to its insulate, double-skinned design, they are ideal for all round use meaning you get maximum use from your latest investment. In addition to its double-skinned design, the roof and floor are also fully insulated, meaning all sides of your building are wrapped up from the elements. In addition, double glazed windows not only contribute to the temperate regulation inside your new space, but also offer a sound barrier to outside noise, creating a calm and relaxing environment. 

Garden rooms are also proven to add value to your home. You can typically expect 1.5x the cost of the garden room to be added to your house in value, so it really does pay to have additional space! With working from home and home businesses becoming increasingly popular, a space away from the house is often on the shopping list of prospective buyers.

Fully Insulated Structure

Our Insulated Garden Rooms offer fully insulated walls, roof and floor not only to make sure your new space is comfortable during the colder months, but also to encourage it to stay cool during the warmer months.

Our Sherwood Range boasts 100mm thick walls, with EcoQuilt insulation nestled in between the timber cladding. You can also find EcoQuilt in the roof. EcoQuilt is a multi-foil insulation, manufactured in the UK which also includes a high-performance vapour control layer helping ensure your building remains free from damp and moisture. In addition to EcoQuilt, the floor is insulated with AirTec insulation which boasts a 50% reduction in heat loss by trapping air within its bubble structure.

Customisable Design

Available in multiple sizes, this garden room is versatile and customisable. Looking for more windows? Not a problem. Wanting to move the door location? We can do that. Simply add them on from our upgrades list, or give us a call and we can talk this through until you achieve your perfect design.

EPDM Roof Covering

As standard with our Sherwood Range of garden rooms, you will receive an EPDM roof covering, rather than traditional mineral felt. EPDM is an impermeable synthetic rubber which boasts a 50-year lifespan, keeping your garden room’s roof dry and damp free for decades to come. It’s pliable in both the heat and the cold, meaning cracks and areas of weaknesses do not form like they may do with traditional roof coverings. It’s also resistant against harmful UV rays. In addition, in the chance of any small tears or holes, unlike traditional felt where the whole roof covering would need to be replaced, EPDM can be simply patch repaired, which is far more efficient and cost effective than an entire roof covering replacement.

Double Glazed Windows as Standard

Featuring double glazed, opening windows as standard, you’re able to easily let fresh air flow throughout your new garden escape and welcome the quintessential smell of freshly cut lawn into your new relaxing retreat.

Traditional Insulated Garden Rooms

Elevate the attractiveness of your garden with a traditionally designed Insulated Garden Room that emanates Alpine charm. Featuring timeless elements such as a peak roof and charming casement windows, its enduring aesthetic seamlessly integrates with your outdoor space.

Anti-Rot Guarantee

Enjoy peace of mind with our Insulated Garden Rooms, backed by a 10-year anti-rot guarantee at no extra cost. You can relax in your new outdoor space knowing your building is protected by us. 

Home Installation Included

So you can sit back and relax, Home Installation Service by our expert installers is included with the price of this building as standard. They will arrive ready to put up your new retreat to our exacting standards. They’ll tidy up after themselves, so the only thing you have to do is step in and enjoy your new space.

Sustainable Timber

Each insulated garden room in our selection is exclusively crafted from ethically sourced and certified timber, meticulously manufactured right here in the UK by our experienced team.

The History of Waltons

Here at Waltons, we've been handcrafting garden buildings since 1878. Starting from humble beginnings, we started life manufacturing bee hives and then quickly expanded to a whole range of garden buildings to suit a whole range of needs. In the almost 150 years we've been making beautiful structures out of wood, we've certainly learnt a thing or two! So, you can trust us to bring all your garden dreams to life. 

Still have questions?

If you're still unsure, why not call our expert, friendly sales team on 01636 821 135 Alternatively, visit our showsite based in Nottinghamshire.

What Our Customers Say

January 27, 2026

Absolutely no complaints!

It’s a very well-made, very quality product.

- Kane N..

January 27, 2026

Absolutely no complaints!

An outstanding item with a truly great build.

- Aliyah Q..

January 27, 2026

Absolutely no complaints!

This has become my absolute favorite gadget.

- Adam V..

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