After discussions with Mark, our architect, and Ellie, our project manager from the timber frame company, we decided on an approach which would both minimise the number of heavy vehicles which needed access to the site, and which reduced the amount of concrete being poured or otherwise assembled into the ground to an absolute minimum. These priorities came from pragmatism (our access is a bit narrow, and shared with our neighbours – it was important to minimise damage to the drive and above all nuisance to our neighbours) and also out of our desire wherever possible to make environmentally responsible choices.
We hoped to minimise excavations; thankfully the building regulations inspector came and peered into our relatively shallow foundation trenches and was content with what he found there – a subsoil commonly found locally known as ‘shillet’, made up of broken up soft slate and shale. This meant we could get on with pouring a relatively small amount of concrete – a layer about 20cm deep. Continue reading