Cabin insulation kits from Summerhouse24

A basic garden log cabin is a seasonal building, but with a very small amount of extra work you can insulate your cabin and use the space 365 days a year. It is much easier and cheaper to insulate your cabin at point of first install than fit it retrospectively.

Floor and roof insulation kit

Our cabin insulation kits are made for quick and easy DIY installation. These kits include all the necessary components and fixings for floor and roof insulation. Roof insulation sits above the cabin roof boards, is then covered with an OSB board and finally the roofing shingles, felt or with another suitable exterior roof covering. For the roof covering we offer various options at an extra cost or you can also visit your nearest DIY store and supply your own covering. See individual product pages for options on your chosen model.

An insulated cabin floor and roof will dramatically extend the period of cabin use throughout the year and improve comfort levels in both summer and winter months. Additional heating will ensure the cabin stays cosy and warm, even with freezing temperatures outside, thus enabling you to use your cabin all year around in most parts of the UK. Our floor and roof insulation kits not only keep the cabin warm in winter time, but they also do keep the cabin cooler during hot summer days.

Our insulation boards have been specifically designed to eliminate thermal bridging. Boards include low emissivity foil facings, offering effective thermal performance within cavity air spaces. They provide reliable thermal insulation and long-term energy savings for buildings.

How to insulate cabin roof

Roof insulation kit consists of 25mm insulation boards and 11mm OSB boards. Place insulation boards on top of roof boards. Starting from the lower end, cover the entire roof with insulation boards and cut the last boards to size. Place the boards tightly to each other. Then place OSB boards on top of insulation boards and fix with screws in all four corners of each OSB board and one in centre. Finally cover the roof with roofing felt, shingles or other types of roofing material. We recommend and supply Icopal self-adhesive roofing shingles for apex roofs and extra durable self-adhesive Firesmart roofing felt as well as EPDM roofing for pent and flat roof cabins.

Roof boards
Insulation boards
OSB sheets
Roofing shingles / roofing felt

How to insulate cabin floor

Floor insulation kit consists of 25mm insulation boards. We recommend using screws to support insulation boards and keep all boards on the same level beneath the floorboards. First fix the screws to foundation beams 25mm from the top of the beam, then cut the insulation boards to size, so that they will sit tightly between the foundation joists, install insulation boards and then the floorboards. Screws should be inserted on both sides of the internal floor beams approximately every 30cm along their length. The insulation boards should sit snugly between the beams and stay in place so the screws are an added mechanical fixing in case vibration from above or cabin movement causes the insulation board to fall.

The floor and roof insulation of a 20 m2 or larger garden room, depending on the roof type should be achievable to complete within 4-5 hours, which we think is a worthwhile extra to add to your garden room, garden office or to any other wooden building, if you’d like to use it year round.

Foundation beams
Screws
Insulation boards
Floor boards

And that will do it! Your garden room or home office is now well insulated. It is time to coat your cabin with wood preservative from the outside and all internal parts of the doors and windows. Don’t forget to treat the unseen top and bottom of doors and windows too! Finally add your personal touches or internal decoration and off you go with your all year round use garden building.

Hansa ISO Window Insulation & Seal System

The Hansa ISO window insulation system has been specifically designed to insulate the concealed voids between the window units and cabin wall logs, while still allowing natural movement to occur. This system is especially effective during winter months and if your cabin is located in an exposed area as the flexible seal is added protection from strong wind and driving rain being forced through the fascia boards.

Why have voids in the first place?

Due to the natural properties of wood, it expands and contracts throughout the seasons depending on moisture levels in the atmosphere and temperature. So, it is important that the building has the flexibility to move to compensate for these changes. Window units obviously must be rigid and fixing the window units to the wall logs would restrict the cabins movement and potentially damage the window units as the heavy wall logs try to pull against them. Voids are left around the sides and top of the units and this is called a floating frame system.

The window units are secured in place with the pre-cut fascia boards supplied for internal and external installation.

Why is the Hansa ISO Window Insulation system different?

Our system uses high-quality flexible materials to seal around the window unit and cabin walls and fill the void with a high thermal efficiency flexible foam. The materials remain flexible and breathable and will not hold moisture. You can see the system demonstrated in the following video:

Can I not just use expanding foam or Rockwool?

No! Most expanding foams become rigid or will over time and this will restrict the cabin’s movement and block the settlement gap. Rockwool retains moisture which will encourage mold and mildew to develop which will damage the wood.

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