Matty and I starting to weave the roof support layer. We nailed lengths of willow to each rafter then wove them round in a giant structure. Their length and solidity made it strenuous work to bend each branch into position.
As the willow would be seen from underneath, it was important to check that it looked good from below.
Three days later the weaving is complete. It got more and more challenging to bend the branches into position, even choosing lighter more supple lengths made for interesting work. The surface covered a multitude of unevenness underneath and looked almost too good to support further layers.
From ground level the structure is starting to resemble a building.
Layers of protective material, waterproofing and further protective surfaces are added to make the structure waterproof. Folding the layers proved challenging as there was a huge surplus at the centre that had to be folded to keep the whole thing water tight.
Doing battle with the final layer of geotextile membrane
Finishing touches to the layer of earth. We barrowed about 6 tons of soil onto the roof, sufficient to suport vegetation throughout the year with a bit of watering through the summer. The whole building remained solid and comfortable to walk on even with all this weight. Most of the planting will happen in the autumn as it is a better time to get plants to establish. By this time next year the roof should be vibrant and green.