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Shed cred – welcome to the treehouse

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Shed Zeppelin replaced an old caravan. The caravan was ugly and badly insulated. There was no fire and in the winter we shivered around a gas cooker, grilling tomatoes or cheese on toast. Kevin’s straw bale structure was a luxury apartment compared to this. It was big enough to function as store room, mess house, meeting place and, occasionally (more in the summer than winter), crash pad for tired gardeners with early morning duties to perform. It was a good multi-function space for the whole year.

Jenny and Mehdi’s garden structure in Kay Zitron’s garden in Aberdovey is quite a different affair. Not at all chunky, it shows off the elegance of wood in an open summer stage topped with a curved roof garden and complemented by an enchanting (noises off) room for grandchildren. Kay wanted a structure that would connect an existing patio to a courtyard garden below, that would give her panoramic views of the Irish sea, that would allow her husband to do his office work outside during the warmer months, and provide a place for her grandchildren to play. She also wanted something that would give her the feeling of being in a treehouse.

Although I don’t imagine many people will have the space or time to take on a project like this, it shows off all the main features of ecological design extremely well. It provides an example of a small shed project (the children’s room), which is feasible in any small garden, and a larger open structure that would provide shelter with a minimum of materials.

Let’s take a quick tour. Entering the garden courtyard you are immediately struck by the drop from the house to the garden. Before the structure was built the only way to get to the garden was down a set of old concrete steps. These did not sit well with the rest of the garden.

The solution was to incorporate a new set of steps into the overall design, to take people from the house, through the stage area and down to the garden. The whole structure is made out of green oak, which means it has been used freshly cut. Green oak lasts for decades without artificial preservatives and is extremely strong. Other woods, such as hazel, become brittle within a few years and cannot be used for this sort of structure. Most manufactured and homemade sheds are made out of seasoned wood, timber that has been left to dry for at least a couple of years. Green oak has a high moisture content and dries in situ. This means it shrinks on the job so you have to allow for this process. The green oak used here was cut to order from Powys Castle and sawn locally but there are numerous suppliers around the country. The structure is held together with green oak pegs too.

The stairs are shaped inwards at the top to create a sense of being drawn towards the rest of the structure. Standing at the bottom, it almost feels like you are climbing into a painting by Escher.

The stage is a triumph of space saving and space enhancement. It is supported on four posts of green oak placed on four concrete pads. Because the load is borne by these four stilts there was no need to lay trenches for concrete foundations. This saved on labour, energy and materials. The stilts also freed up the space underneath the structure (for shade-loving plants, and a cool place to sit on very hot days). The structure itself is a vertical space for plants, with climbers trailing up to the roof. In a sunny, south-facing garden this is a perfect place to grow sun-loving fruits and maximise your home harvest.

Climbing to the top of the stairs you can turn left or right. Take the right turn and you come to the stage, but let’s take a little detour first. Stroll along the boardwalk under the clematis bower a moment and you’ll come to a small handmade wooden door. Open it and you enter the children’s playroom – a magical little space with a unique view of the garden through a square window. It’s made using a green oak frame and topped and sided with oak shingles cut by English company Carpenter Oak. To ensure

The Organic Garden

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