Cavity Wall

What is a Cavity Wall?

A cavity wall is a type of wall construction that consists of two parallel walls separated by a gap or cavity. The cavity is typically filled with insulation material to improve the thermal performance of the wall. The outer wall is usually made of brick or stone, while the inner wall is made of concrete blocks or bricks. The cavity between the walls can vary in width, but it is typically around 50mm to 100mm.

What is the purpose of a Cavity Wall?

The purpose of a cavity wall is to improve the thermal performance of a building by reducing heat loss through the walls. The cavity acts as a barrier to prevent heat from escaping through the walls and into the external environment. This is important because around 30% of heat loss in a building occurs through the walls. By using a cavity wall, the heat loss can be reduced, which can result in lower energy bills and a more comfortable living environment.

What are the benefits of a Cavity Wall?

Cavity walls also provide other benefits, such as improved sound insulation and increased resistance to moisture penetration. The cavity helps to reduce the transmission of sound from the external environment into the building, which can result in a quieter living or working environment. Additionally, the cavity provides a barrier to moisture penetration, which can help to prevent dampness and mould growth inside the building.

Cavity walls provide a barrier to protect the internal walls

Cavity walls were first used in the UK in the late 19th century as a solution to the problem of dampness in buildings. The cavity provided a barrier to moisture penetration, which helped to prevent dampness and mould growth inside the building. However, it wasn’t until the 1920s that cavity walls became a common form of wall construction in the UK.

Why it’s important to keep the cavity clear or hollow

In summary, a cavity wall is a type of wall construction that consists of two parallel walls separated by a gap or cavity. The purpose of a cavity wall is to improve the thermal performance of a building by reducing heat loss through the walls. Cavity walls also provide other benefits, such as improved sound insulation and increased resistance to moisture penetration. The use of cavity walls has become increasingly popular over the years, particularly as energy efficiency has become a key concern for building owners and occupants.

Frequently Asked Questions

Q. Why might I need cavity wall insulation extraction?

A. Cavity wall insulation extraction may be necessary if the existing insulation is causing problems such as dampness, mold growth, or reduced insulation effectiveness. It may also be required if the insulation was installed incorrectly or with faulty materials.

Q. How is cavity wall insulation extraction carried out?

A. The extraction process typically involves drilling small holes in the external wall of the building and using specialist equipment to remove the insulation material from the cavity. The extracted material is then disposed of in an environmentally responsible manner.

Q. Is cavity wall insulation extraction a messy process?

A. The extraction process can be messy, as small amounts of insulation material may escape through the holes drilled in the external wall. However, a professional insulation removal company will take steps to minimize the mess and clean up any debris after the job is complete.

Q. How long does cavity wall insulation extraction take?

A. The duration of the extraction process will depend on the size of the building and the amount of insulation material that needs to be removed. In general, a typical house can be completed in one to two days.

Q. Can I get a grant for cavity wall insulation extraction?

A. There may be financial assistance available for cavity wall insulation extraction through government schemes or utility companies. However, eligibility criteria and available funding can vary depending on location and other factors.

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