QA

Question: How To Build With Cob

Can I build a cob house?

With cob house construction, a poured concrete foundation can be used or you can form a cob floor. Another great thing about cob is that it’s very durable once dried. You can also use concrete color when you mix the cob.

How long does it take to build a cob house?

Cob building lends itself to incorporating salvaged and eclectic building materials. This ìhobbit houseî in Wales was built in four months and cost about $4,600 in building materials.

Do you need planning permission for a cob house?

As with all builds, it is necessary to get planning permission and satisfy Building Regulations. While this may be complicated there is no reason why you should fall short of meeting the Building Regulations, but obtaining planning permission will depend on the outlook of your local planning office.

How long can a cob house last?

How long does cob last? The oldest cob house currently standing is 10,00 years old. If this doesn’t speak to how strong and durable cob houses are, then nothing will. Cob houses are built to stand forever as long as their roofs are maintained, and they are properly looked after.

Are cob houses safe?

Since soil is used as the base material for the building it is almost completely fireproof and termite-proof. This makes cob house one of the safest DIY homes that one can go for.

Are cob houses waterproof?

Cob is very resistant to weathering. Because of its porous nature, it withstands long periods of rain without weakening. However, too much exposure is best avoided by the “boots and cap” strategy: wide roof eaves to protect the walls and an impervious foundation.

Did Kevin ever finish his cob house?

Grand Designs UK’s Kevin McCloud revisits a cob castle in East Devon that first featured on the show five years before – and is now finally finished.

How thick should cob walls be?

The walls of a cob house are generally about 24 inches (61 cm) thick, and windows were correspondingly deep-set, giving the homes a characteristic internal appearance. The thick walls provided excellent thermal mass which was easy to keep warm in winter and cool in summer.

What is the difference between cob and adobe?

How is cob different from adobe? Cob is only one of many methods for building with raw earth, the world’s commonest construction material. The most basic difference is that adobe is formed into rectangular bricks which are dried in the sun before being used, while cob is built wet.

Can you get a mortgage on a cob house?

Cob houses are generally acceptable to most mortgage companies, but it is worth checking with a financial advisor before making a mortgage application. Like many other older building methods, thatched roofs offer excellent thermal properties, as well as looking particularly attractive on the top of an old cottage.

Do cob houses have electricity?

Electricity and Internet in Cob Homes Many people think that by building a cob home you are committing to a life of ‘living off the grid’ but in fact you can actually have all the things normal homes have including plumbing, electricity, cable and internet.

How fast can you build with cob?

In dry weather we build up to a foot (30 cm) of height per day.

Is building a cob house cheaper?

A: Cob building can be extremely inexpensive if you do it yourself. The materials for the walls are very cheap. However, keep in mind that walls are only a small cost of any building: foundations, roofs, windows, doors, floors, finishes, cabinetry and so on are typically a much higher portion of the cost.

Where can you build with cob?

Cob has been built successfully in very wet places like British Columbia and Wales. If you get very frequent rain you may want to put up a big tarp over the site during construction, or build the roof first.

Is cob a good building material?

Cob is fireproof, resistant to seismic activity, and uses low-cost materials, although it is very labour intensive. It can be used to create artistic and sculptural forms, and its use has been revived in recent years by the natural building and sustainability movements.

How long will a cob house last?

How long does cob last? The oldest cob house currently standing is 10,00 years old. If this doesn’t speak to how strong and durable cob houses are, then nothing will. Cob houses are built to stand forever as long as their roofs are maintained, and they are properly looked after.

How hard is it to build a cob house?

Cob house construction is an ancient building technique mixing lumps of earth with sand, straw, and water. Cob building is easy to learn, requires no special equipment, and uses sustainable materials.