Construction
At Cosy Garden Rooms, we pride ourselves on delivering a seamless experience from start to finish.
From the ground preparation and foundation to the final trim around the roof, every detail is handled with care. We are committed to using sustainable, high-grade materials in all our buildings coupled with exemplary customer service. We pride ourselves on being a company that truly cares about its customers.
Step-by-Step Construction Guide
Foundations
We build a concrete foundation as standard that ensures your room is stable, level, and will last for years.
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Structural Framework
Once the foundation is in place, we begin building the framework. The structure of our garden rooms is made from timber, ensuring strength and longevity. This is custom-built to suit your design, with quality insulation integrated into the walls, floor, and roof for maximum comfort year-round.
Insulation and Cladding
For energy efficiency, we use high-quality insulation materials. This keeps the room comfortable in all seasons. The outer cladding is available in a range of finishes, including composite, cedar, redwood and brick.
Roof
Our garden rooms come with a strong standard roof with EPDM and Rockwool insulation. All our roofs are capable of supporting a sedum green roof, if you choose that option. The green roof is not only eco-friendly but also helps with insulation and stormwater management.
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Windows and Doors
We use high-quality double-glazed windows and doors; either UPVC or aluminium. These can be customised to your design—whether you want large corner windows and bifold doors or a more compact design for privacy.
Interior Finish
Inside, we offer a range of finishes. From brilliant white painted walls to bespoke feature walls. You can also choose flooring in a range of colours.
Wall Construction
Cosy Garden Rooms walls are made up of at least 5 different layers giving superior insulation. The layers are:
Roof Construction
Although appearing to be flat roofs, there is a slight pitch which is created on the strong timber frame; this runs to the back of the building so rain water can flow into the gutter. The roof is covered in one seamless piece of EPDM rubber whenever possible, so no joins or gaps that can leak. This helps to guarantee the longevity of your garden building. Fascia boards finish the roof off.
Between the rubber roof on the outside and the MDF boarded ceiling on the inside, the roof structure is filled with rockwool insulation to keep the rising warmth inside the building and the cold air out.
Cladding
Cladding is the first line of defence for your garden room walls. This can be maintenance free Hardie board, cedar, redwood, composite, vertical slat cladding or composite brick and stone effect. If you wanted to use zinc or Swiss Pearl this could also be fitted.
A Breathable Membrane
The one-way vapour barrier prevents any water ingress from outside so your internal walls will never get damp. However, it does allow moisture to pass through it the other way, from the inside to outside. This helps to reduce internal condensation on the windows.
Security Cladding
Our garden rooms are built using a timber frame construction method, enhanced with an 11mm OSB layer on the exterior for added security, strength, and insulation. This layer acts as a solid barrier behind the external cladding, preventing easy removal and improving overall security. It also reinforces the building, reducing frame movement around windows and doors while providing extra support for fragile composite boards, making them more resilient to impacts. Additionally, the OSB layer enhances sound and heat insulation, ensuring a quieter, more energy-efficient space.
Grooved or smooth MDF Board
We use MDF for the internal boarding to our buildings. It is strong and durable, it is far easier for you to hang things; pictures, shelving etc, and it is made of tightly packed fibres, there are lots of tiny air pockets; these boards are thermally better than plasterboard. Our walls feel warm to the touch, they are then finished with skirting boards.
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Sedum green roofs
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Solar panels
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Halo lighting
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Wall mounted radiator
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Track lighting
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Aluminium windows and doors
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Bespoke wall coverings and wallpaper graphics
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Windows with integral blinds
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Higher than standard buildings
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Roof lanterns
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External lighting options
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Drinks bar
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Additional electrical components
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Composite and timber grip decking
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Skylights, pitched roofs and bi-fold doors
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Composite vertical slat, stone and brick cladding
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Underfloor heating and air conditioning
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Internal partition walls and doors
More options and choices than any other supplier
We believe we are the most bespoke garden room designer and builder in the UK. Innovative, contemporary options include:
The Frame
This is a 90mm thick frame, structurally very strong, if you want to put TV’s on the walls, cabinets etc they will take the weight.
50mm Insulation
Over half the wall is filled with silver-backed insulation, similar to that used in supermarket refrigeration units, ensuring excellent thermal performance. The remaining cavity provides additional insulation and space for electrical wiring and fittings.
