Cob Restoration and Construction

Cob has been used to build homes since ancient times. By using earth and natural fibers (typically straw) which are easily available in the surrounding area cob was traditionally seen as quick and cheap building material. British cos is quite similar to the adobe used in hotter climes. Like adobe the basic ingredients are are clay and sand is the same, but cob uses far more fiberous material.

Also, rather than make regular blocks or bricks from cob to construct the house, cob is typically built up by hand. Cos is mixed as large lumps (or cobs) small enough to be handled with ease throughout the construction process. These cobs are a mixture of the the clay, sand and straw. This mixing is done by foot (like crushing grapes). Because of this making the cob is fairly labour intensive.

Many cob properties across Devon which have stood for centuries, were originally built by their original inhabitants. Now, however, the art of building with cos is restricted to a few specialist builders. Corbel conservation are one of these specialist building firms. Corbel offer a wide range of period and traditional techniques, for new builds with that historic look, to restoration and renovation of genuine historical buildings. They can also carry out work with lime renders, stonework cleaning, masonry repairs, traditional roofing techniques and full conservation management. Corbel Conservation also work closely with the relevant authorities, ensuring that all work carried out on listed or otherwise protected properties is carried out using traditional techniques and materials.

Many cob properties have a thick lime render to provide better protection from the elements. This lime render will last for years with nothing by the odd coat of paint, but occasionally it will need patching or even replacing. Damaged render will need to be properly checked, especially if it has been damaged for a while. Damaged render can trap water between it and the cob underneath, this can lead to structural problems in extreme cases and needs to be checked as soon as possible.