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Period Restoration
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Cob Building Repair
Cob Building and Repair
Cob is still successful and being sustainable, it is an effective material for construction
Cob Building
Working with English Cob
English Cob was traditionally made by mixing chalk or clay with straw and water which was then trampled on by oxen. While putting the mixture onto a stone foundation in courses, the mixture would be trodden onto the wall by the workers, known as cobbing. 

Once the wall was dry, it would be trimmed, ready for the next course with oak lintels ready for doors and windows to be placed. A cob house generally had walls around 24 inches thick with deep set windows, creating character. The thick walls make the house easy to keep warm in the winter and cool in the summer.

Cob Building and Repair Specialists
Cob Building

English Cob Buildings

Cob is still successful and being sustainable, it is an effective material for construction. Without proper maintenance, cob walls will develop cracks and holes resulting in vermin and erosion. Cement render is very deceiving and often surveyors and homeowners do not realise that the wall is actually made from cob.

Dips and hollows in the Cob surface is often the result of water damage. To carry the forces acting from above, repairs should be made up in horizontal layers which can be done by making cob blocks. The blocks can be bedded in an earth mortar made from sub soil. A sticky mortar is formed after the earth has been sieved to remove larger stones and been mixed with water. This then gives the blocks good bedding.

Lime Mortar Specialists Cornwall
Traditional and Modern Heritage Builders
Helston, Cornwall
Tel: 01326 280 405
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