In the last month we have been working alongside Osian Denman – a heritage carpenter – who has taken on the task of helping us to construct the roundwood frame and roof. This part of our build requires great expertise and skills to realise our design and to guarantee an excellent finish.
We are learning lots of new skills and are using an array of both traditional and modern tools. We’re enjoying learning about how the structure will all fit together.
We have been taking advantage of the long evenings where possible to pack in as much work as we can.
An essential characteristic of working with roundwood is to see both its roundness and the square inside at the same time. Roundwood carpentry is different from other woodwork in that the wood being used is in its natural state. Despite this it still relies on keeping things square and plum as in ‘normal’ carpentry.
An interesting aspect of carpentry is the use of inches rather than millimetres for measurements. Inches allow for easy subdivision – half, quarter, eighth, etc – are all useful and easily recognisable measurements to visualise rather than, say, 20 mils.
All parts of the timber frame are assembled beforehand on the framing bed, labelled and put to one side. These are then put together in the form of lay-ups (which is essentially a practice run where if there are any inaccuracies they can be corrected before the large beams are suspended in the air. Correcting at height will be more difficult and potentially dangerous, so time spent making adjustments on the ground is time well spent.
At the outset of our build we aimed not to use any concrete in its construction due to its large embodied energy and polluting production. Reducing the embodied energy in what we use is very important and this had led us to choose materials in their raw state so as to reduce our carbon footprint . However, we’ve had to compromise on this as our engineering specification for supporting the posts means we needed to use some concrete in order to achieve compliance and to ensure our house will be structurally sound.
We used 4 tons of concrete. I used an online calculator to calculate the amount we had to mix. Luckily our local hardware – Tullamore Hardware – allows returns of used bags of cement as it can be difficult to store on site.
We have enjoyed several visitors to our site in the last few months. It’s a great experience to share our ideas and dreams with friends and acquaintances.