Asked By: Miguel Richardson Date: created: Nov 24 2021

What is COB made out of

Answered By: Neil Evans Date: created: Nov 24 2021

Cob, cobb or clom (in Wales) is a natural building material made from subsoil, water, fibrous organic material (typically straw), and sometimes lime. The contents of subsoil naturally vary, and if it does not contain the right mixture it can be modified with sand or clay.

Asked By: David Griffin Date: created: Nov 01 2021

What is the difference between adobe and cob

Answered By: Carter Jones Date: created: Nov 01 2021

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. Cob therefore lends itself to organic shapes: curved walls, arches and vaults. Building with cob is a sensory and aesthetic experience like sculpting with clay.

Asked By: Cody Hall Date: created: May 02 2022

How long do cob walls last

Answered By: Timothy Hughes Date: created: May 05 2022

Any type of clay can be used, but be careful not to use silt which can sometimes appear like clay. The oldest cob house still standing is 10,000 years old. Cob is strong, durable and cob houses should stand forever as long as their roof is maintained and the property is looked after properly.

Asked By: Christian Richardson Date: created: Jan 12 2022

Where is the oldest cob house

Answered By: Cyrus Turner Date: created: Jan 15 2022

Cob is one of history’s oldest building materials, and has been used all over the world. Many of the oldest standing structures in places like central Asia, the Middle East and sub Saharan Africa are made of cob. Known regionally as “tabya” cob was also used commonly in the Maghreb and al Andalus regions.

Asked By: Nicholas Powell Date: created: Jul 16 2021

Is cob a good insulator

Answered By: Dylan Green Date: created: Jul 17 2021

Cob has great thermal mass but poor insulation value. In very cold weather, especially when the sun doesn’t shine for extended periods, you will lose a lot of heat through those cob walls. A more efficient approach would be to make most of the exterior walls out of a more insulating material such as straw bale.

Asked By: Raymond Gray Date: created: Feb 14 2021

How do you waterproof a cob

Answered By: Andrew Taylor Date: created: Feb 15 2021

0:19

6:02

Suggested clip 94 seconds

WATERPROOFING a COB wall (earthen plaster) with linseed oil

YouTube

Start of suggested clip

End of suggested clip

Asked By: James Jackson Date: created: Jan 31 2022

Does cob wash away

Answered By: Isaac Hernandez Date: created: Feb 02 2022

Why doesn’t it wash away in the rain? Cob is very resistant to weathering. Because of its porous nature, it withstands long periods of rain without weakening.

Asked By: Jack Cox Date: created: Jun 02 2021

How long does it take for COB to dry

Answered By: Logan Ward Date: created: Jun 04 2021

Once you make your cob, it will need to dry out full and that can take months to years. The bulk of the moisture will dry out of the walls in the first year, but will not fully cure for 1-2 years past that.

Asked By: Brian Walker Date: created: Feb 26 2022

How do you mix cob

Answered By: Keith Carter Date: created: Feb 27 2022

Mix dry sand & sifted clay together first, then add water and start stomping. Use the tarp to roll drier mix on top of the wetter mix, keep stomping, and continue adding water until the cob is sticky but stiff.

Asked By: Xavier Russell Date: created: May 27 2022

How much does a cob house cost

Answered By: Oscar King Date: created: May 27 2022

Cob house cost

A decent cob house can be built for anything ranging around $4,000 – $10,000. However the cost can vary depending on the climatic condition, location and the size of the house. The basic cost, however, may lie somewhere around $2000 – $5000.

Asked By: Lucas Howard Date: created: Sep 02 2021

Are cob walls waterproof

Answered By: Isaac Allen Date: created: Sep 03 2021

I live in Portland, OR, a cool, rainy climate. A: What you’re referring to is an earthen plaster, rather than cob. Cob is a structural mixture of clay, sand, and straw, used to build walls. Lime plasters are waterproof in the sense that they do not get soft when soaked, but they are also very breathable.

Asked By: Wyatt Bell Date: created: Nov 05 2021

Can cob houses be built in cold climates

Answered By: Leonars Phillips Date: created: Nov 08 2021

A: In places with cold winters, the most efficient homes are well-insulated to keep heat inside. Cob has excellent thermal mass for heat storage, but poor insulation. So an all-cob building will slowly leak heat through the walls in cold weather.

Asked By: Elijah Sanders Date: created: Jun 17 2021

How long will a straw bale house last

Answered By: Oswald Phillips Date: created: Jun 20 2021

100 years

Asked By: Isaac Ward Date: created: Nov 10 2021

Are cob houses waterproof

Answered By: Samuel Hernandez Date: created: Nov 12 2021

It’s also water-resistant. The area containing the cob oven and seat isn’t protected from the rain. Yet the cob has stood its ground. How did they do it?

Asked By: Evan King Date: created: Mar 20 2022

How is a cob house made

Answered By: Alfred Gonzales Date: created: Mar 22 2022

Cob houses are made of clay-like lumps of soil, sand, and straw. Unlike straw bale and adobe construction, cob building does not use dried bricks or blocks. Instead, wall surfaces are built up with lumps of damp cob mixture, compressed, and sculpted into smooth, sinuous forms.

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