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Insulated Summer Houses

Insulated summerhouses for year-round comfort and use. Temperature-controlled outdoor retreat perfect for all seasons. Free assembly available throughout England.

FREE Installation

Toughened Glass

Bespoke Options

Coloured Paint Option

Insulation Options

Base Building Option

Insulated Sunroom Showsite

Wooden Floor & Roof

Double Door Option

Apex or Pent

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Interior lining options for garden summer houses

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Our fully insulated summerhouse is made from redwood deal (not cheap whitewood) with solid wooden floors and include free installation. Available in sizes from 7×5 right up to 28×16. Bespoke designs available. Toughened glass is standard. Base building service. Free site surveys. VIEW at our summer house display site, near Guildford, Woking and Ripley in Surrey.

Showing 1–28 of 38 results

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View More Insulated Summerhouses Images

Horizontal T&G Lining

Shows image of summer houses insulated with horizontal T&G boards

Insulated Ply Lining

Shows image of summer houses insulated with MDF boards boards

MDF Lining & Insulation

Shows image of summer houses insulated with vertical T&G boards

Vertical T&G Lining

Shows image of garden sheds insulated with plywood boards

Click on images below to see larger versions of summerhouses

image of Diamond Arlington Summer building

image of Diamond Ashington sun room

image of Diamind Bolney summer building

image of Diamond Bracklesham octagonal building

Click on images below to see larger versions of summerhouses

image of Diamond Eastbourne Summer building

image of Diamond Keymer apex or pent

image of Diamond Washington summer building

image of Diamond Worthing corner building

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Click on images below to see larger versions of combination garden rooms with shed

Choose from a large range of Sadolin colours and make your new Diamond painted summerhouses special.

We recommend OPTIONAL Demidekk Ultimate log cabin paint range which can be colour matched to suit. See examples in our photo gallery.

Image gallery of painted summerhouses - 1st Choice Leisure Buildings

Royal treatment chart available for pre-painted summ houses - 1st Choice Leisure Buildings

Image gallery of painted summerhouses - 1st Choice Leisure Buildings

Royal treatment chart available for pre-painted summ houses - 1st Choice Leisure Buildings

Please note that all colour shown are indicative only and will vary depending upon the light on the day the photo was taken. Additionally all screens will display the image differently. If exact colour is essential then please order a sample pot.

Why Invest in a Insulated Summerhouse?

Our insulated summerhouses have become a popular choice amongst homeowners due to their year-round usage. From pressure-treated summerhouses to stylish painted summerhouse options, all of our insulated summer houses provide you with ample room for a garden workspace, storage for your tools or sheltered areas for a children’s playroom.

The higher level of insulation can make it comfortable to use year-round, including summer, by helping regulate temperatures and providing added protection from the elements. If you use your summer building in winter, insulation reduces the energy needed to warm it by conserving heat and limiting cold air entry.

With our vast selection of insulated summer houses for sale, it’s easy to take those first steps in creating your dream garden building for you and your family. Browse our collection below and contact us for bespoke summerhouse options.

We have a large range of buildings to view at our showrooms near Guildford in Surreya>, so you can see the benefits insulation brings.

Should I Order an Insulated Summerhouse?

Investing in an insulated summerhouse from 1st Choice Leisure Buildings is more than just adding a garden structure — it’s improving your property and providing daily comfort. Some benefits include:

* Comfort All Year Round: Unlike traditional summerhouses, which are limited to fair-weather use, our insulated models are fully lined and designed for year-round enjoyment. * Versatile Usage: An insulated summerhouse offers incredible flexibility, adapting easily to your work or leisure needs. * Enhanced Property Value: As more homeowners seek versatile outdoor spaces, having a year-round usable summerhouse in your garden is a significant selling point. * Cost-Effective Expansion: If you’re running out of space at home, a summerhouse offers a smart alternative to expensive home extensions or loft conversions. * Personalised Retreat: Every 1st Choice Leisure Buildings summerhouse can be designed to your needs. * Energy Efficiency: Our insulated summerhouses are built with materials that effectively trap heat in colder months, lessening the need for electric heaters or costly portable units.

DIY vs. Professional Insulation: What’s Best for Your Summerhouse?

Contrary to its name, a summer house is for more than just the summer. With the right insulation, you can enjoy your summer house year-round, feeling secure and content. Insulating your summer house or garden structures makes them usable year-round, ensuring you get more value from your property.

Also, a higher level of insulation can make it more comfortable to use year-round, including in summer, as it helps you regulate temperatures and provides added protection from the elements. Plus, if you are using your summer building in the winter, you can reduce how much energy you use to warm it, thanks to the insulation, which helps conserve heat and keep cold air out of your insulated summer house.

Please consider the pros and cons of each option. Do you do it yourself and potentially save money, or let the experts use their expertise, ensuring complete peace of mind?

Is It Possible To Insulate Summerhouse After Delivery?

If you are handy with DIY projects, you can transform your summerhouse with insulation after delivery. Pick up fibreglass or polystyrene insulation, along with internal cladding such as plywood, hardboard with a stylish veneer, or classic tongue-and-groove panels. To install, cut the insulation to fit snugly between the shed’s timber framing. Polystyrene holds its shape, while fibreglass may need tacks to prevent sagging.

When insulating the shed roof, polystyrene is recommended, as it can be cut slightly oversize and pushed into position, making it self-supporting. It is helpful to have one or two friends assist, as they can hold the roof sheets or tongue-and-groove panels in place while you secure them.

Whether DIY is the best option compared to a professional installing it is for you to decide. Consider if peace of mind is worth the price. More info:-

Will My Insulated Summerhouse Be Cosy In The Winter?

Adding insulation and lining will keep it warmer all year. You will need heating like in your home, but with that it should be nearly as warm. Whether you do it yourself or we do, this is a great option.

For heating, we recommend an electric radiator because it produces dry heat. Do not use a Calor gas heater since it produces moisture and poses a fire risk. Don’t attempt this.

Another benefit of insulation is that the building stays cooler in summer. Few people know this and focus only on keeping it warm. I wasn’t aware of it until I moved from an insulated summer room to an uninsulated one at our display site. I was staggered by the difference.

I even double-checked. This is why it will be a good investment for your shed and a wise decision. You won’t regret it. The insulation option is worth considering.

Choosing the Best Heating System for Your Insulated Summer Building

Heating solutions can turn your insulated summer building into a relaxing space. There are several options for warmth, but they also add an air of refinement to your outdoor building. However, selecting the best one might be challenging with so many options available. That’s why we’re here to help you navigate the maze of heating options and find the best fit for your garden.

It is not advisable to choose any heating system. You should weigh your options carefully. Grab a cup of tea and prepare to learn about summer building heating. So much has to be done, and if you want to stay busy while saving money, we’ve got you covered. So, without further ado, our article on heating systems has everything you need to choose the best heating system for your outdoor haven! More details.

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FAQs For Insulated Summer Buildings

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Can I install electricity and plumbing in my insulated summerhouse?

Yes. Electricity can be safely installed and is often included as a custom option.

Plumbing (e.g., for a sink or toilet) is also possible but requires professional planning and installation to meet building regulations.
Do insulated summerhouses require planning permission in the UK?

In most cases, insulated summerhouses fall under permitted development rights and don’t require planning permission, especially if they’re under 2.5m in height, within 2m of a boundary, not exceeding 15m² in size, and not used as living accommodation.

However, exceptions apply in conservation areas or for large structures, so always check with your local authority.
How effective is the insulation in insulated summerhouses in winter/summer?

Insulated summerhouses are highly effective year-round. With proper insulation and double-glazed windows, they retain warmth in winter and stay cool in summer.

Many models, like the Platinum Odiham, are built for year-round use. For optimal comfort, you can add electric heating or air conditioning.
How long do insulated summerhouses last?

A well-maintained insulated summerhouse can last 15 to 30 years or more, especially if constructed with pressure-treated timber and other high-quality materials.

The lifespan depends on factors like environmental conditions and upkeep, with longer durability achieved through regular maintenance.
What is the difference between an insulated summerhouse and a garden room?

While both can be insulated, summerhouses are typically simpler structures used for leisure.

Garden rooms often offer a higher spec, more insulation, and are tailored for more demanding functions.
What maintenance is required for an insulated summerhouse?
Regular maintenance is essential for longevity. This includes:
- Treating timber every 2–3 years (even pressure-treated models)
- Ensuring proper ventilation or using a dehumidifier
- Sealing gaps to prevent moisture and heat loss
- Inspecting roofs and gutters for leaks
- Keeping the interior at a consistent temperature
- Using a vapour barrier to reduce damp from the ground

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Our Location

Woking Show Site
1st Choice Leisure Buildings
Woking Garden Buildings Show Site
Sutton Green Garden Centre,
Whitmoor Ln, Sutton Green,
Guildford,
GU4 7QA
Phone: 01483 237550

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