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What is Cavity Wall Insulation?

Optimised for homes with cavity walls, this insulation fills the gaps between your home’s exterior layers, significantly reducing heat loss and improving overall energy efficiency.

Understanding cavity wall insulation

Designed to reduce heat loss through a cavity between the inner and outer leaf of external walls of homes, it involves filling the gap with insulating material, which can significantly improve the house’s energy efficiency.

Suitable for many homes built after the 1920s in the UK, this process not only helps in maintaining a comfortable temperature throughout the year but also can lead to substantial savings on heating bills. Cavity wall insulation is a cost-effective way to enhance the property's comfort, energy performance and value.

Cavity wall insulation

Inner wall

Polystyrene beads

Polystyrene beads (EPS) offer lightweight and efficient thermal insulation. Alternatively, rock wool provides excellent thermal resistance and soundproofing benefits.

Cavity

Outer wall

Injection tube

Polystyrene beads are injected into the cavity walls through a small tube, a process that efficiently fills gaps to enhance insulation without major disruption to the property.

Key benefits of wall insulation

Energy efficiency

Energy efficiency

By reducing heat transfer through the walls, it can lower heating and cooling costs.

Condensation control

Condensation control

By increasing the wall’s temperature, it minimises condensation, dampness, and mould growth.

Noise reduction

Noise reduction

The added insulation acts as a sound barrier, creating a quieter home environment.

Increased property value

Increased property value

Besides saving money on utility bills, it but can also make the property more appealing to energy-conscious buyers.

Frequently asked questions

How long does it take to fit cavity wall insulation?

For most homes, the entire installation can be completed in just a few hours. However, larger or more complex properties might take longer. This makes cavity wall insulation a convenient option for homeowners looking to improve energy efficiency without significant disruption.

Who are the best wall insulation installers?

The best wall insulation installers are those with experience, training, and proper accreditation. We only work with installers who are members of reputable trade associations and have positive customer reviews regarding their service, quality, and pricing.

What are the disadvantages of cavity wall insulation?

Installation challenges

Installation challenges

Installation must be done correctly to avoid uneven insulation, which might create cold spots within the walls, reducing its effectiveness.

Installation issues

Incompatibility

Cavity wall insulation is not suitable for all types of buildings, especially older homes with narrower cavities or walls that are prone to moisture.

Removal difficulty

Removal difficulty

If problems do arise from cavity wall insulation, such as dampness or poor installation, removing the insulation can be difficult and costly.

Maintenance

Maintenance

Over time, it may need periodic checks and maintenance to manage moisture, ensure effectiveness, and prevent degradation or pest issues.

What are some cavity wall insulation problems?

Poor installation

Poor installation

If not installed correctly, cavity wall insulation can lead to issues such as cold bridging, dampness, and reduced insulation performance.

Water ingress

Water ingress

If the external finish or sealant is damaged, water may penetrate the insulation system, causing dampness and reducing the insulation’s effectiveness.

Structural issues

Structural issues

In rare cases, adding it may exacerbate existing structural problems or create new ones if not properly assessed and addressed before installation.

Ventilation issues

Ventilation issues

Improperly installed, it can block ventilation paths. The buildup of humidity within the home, would then lead to condensation and mould problems.

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