Different Types of Cavity Wall

Cavity Wall

Many types of cavity wall are a common type of construction used in modern buildings. They consist of two parallel walls with a gap (cavity) between them, and they offer a range of benefits such as improved insulation, increased energy efficiency, and better soundproofing. In this blog post, we’ll explore the different types of cavity walls available and their unique characteristics.

Full Fill Cavity Walls


Full fill cavity walls are also known as fully insulated cavity walls. They are constructed by filling the cavity between the two walls with insulation material, such as mineral wool or foam. This type of cavity wall offers excellent thermal insulation and can significantly reduce energy costs. However, it’s essential to ensure that the insulation material is installed correctly to avoid any gaps that could reduce the effectiveness of the insulation.

Full fill cavity walls are a type of construction that offers excellent thermal insulation and energy efficiency. They consist of two parallel walls with a gap (cavity) between them, which is then filled with insulation material, such as mineral wool or foam. In this blog post, we’ll explore the benefits of full fill cavity walls and why they are an excellent choice for modern buildings.

  1. Improved Thermal Insulation
    Full fill cavity walls offer excellent thermal insulation, which can significantly reduce energy costs. The insulation material used in full fill cavity walls is typically more effective than that used in other types of cavity walls, such as partial fill cavity walls. This means that full fill cavity walls can help keep your building warm in the winter and cool in the summer, reducing the need for heating and air conditioning.
  2. Better Energy Efficiency
    Full fill cavity walls offer better energy efficiency than other types of cavity walls. By reducing the amount of energy needed to heat or cool your building, full fill cavity walls can help you save money on your energy bills. They can also help reduce your carbon footprint, making them an environmentally friendly choice.
  3. Improved Soundproofing
    Full fill cavity walls can also provide improved soundproofing, which can be beneficial for buildings located in noisy areas or near busy roads. The insulation material used in full fill cavity walls can help absorb sound waves, reducing noise levels inside the building.
  4. Reduced Risk of Dampness and Mould Growth
    Full fill cavity walls can also help reduce the risk of dampness and mould growth. By filling the cavity with insulation material, full fill cavity walls can prevent moisture from entering the building and causing damage. This can help maintain the structural integrity of the building and prevent health problems associated with dampness and mould.

In conclusion, full fill cavity walls are an excellent choice for modern buildings. They offer improved thermal insulation, better energy efficiency, improved soundproofing, and reduced risk of dampness and mould growth. If you’re considering constructing a new building or renovating an existing one, full fill cavity walls are definitely worth considering. By choosing full fill cavity walls, you can create a comfortable, energy-efficient, and healthy environment for your building’s occupants.

Partial Fill Cavity Walls


Partial fill cavity walls are constructed by partially filling the cavity with insulation, leaving an air gap between the insulation and the inner wall. This type of cavity wall is easier to construct and is typically more cost-effective than full-fill cavity walls. However, it offers lower thermal insulation than full-fill cavity wall.

Partial fill cavity walls are a popular way to insulate your home. They’re a great option if you want to save money on energy bills and reduce your carbon footprint, but don’t want to commit to a whole-house renovation.
Partial fill cavity walls consist of two layers: an outer layer made up of bricks or blocks, and an inner layer that’s filled with insulation. When these two layers are combined, they create a barrier against heat loss through the exterior wall surface while still allowing moisture from inside the house to escape through the brickwork or blockwork (the “cavity”).

Advantages of Partial Fill Cavity Walls

  • Ease of construction
  • Cost-effectiveness
  • Thermal insulation

Disadvantages of Partial Fill Cavity Walls

There are a few disadvantages to this type of wall construction. First, it’s not as energy efficient as other types of walls. The insulation value is lower because there is less space between the studs and the cavity. This means that you’ll be paying more on your utility bills each month during the winter months when you need more heat in your home.
Another disadvantage is increased risk of moisture and mould growth within the wall cavity itself due to its open nature (the same goes for full fill). Moisture can get trapped inside the walls and cause damage over time if not properly maintained or dried out regularly by using fans or dehumidifiers during rainy seasons like springtime when there’s an increase in humidity levels outside due to rainwater runoff from roofs into gutters which then flows into storm sewers leading directly into streams/rivers/lakes etc…

Cavity Wall with Rigid Foam Insulation

Cavity walls with rigid foam insulation are constructed by adding rigid foam insulation to the cavity between the walls. This type of cavity wall offers excellent thermal insulation and is often used in commercial buildings. However, it’s essential to ensure that the foam insulation is installed correctly and that it’s the right type of insulation for the building’s needs.

In recent years, rigid foam insulation has become increasingly popular as an insulation material for cavity walls. Rigid foam insulation is a type of insulation made from polystyrene, polyurethane or polyisocyanurate foam. It is rigid and provides a high level of insulation, making it an ideal material for cavity walls.

There are several benefits to using rigid foam insulation in cavity walls. Firstly, it provides a higher level of insulation compared to other types of insulation such as mineral wool or fiberglass. This means that buildings with cavity walls insulated with rigid foam insulation will be more energy-efficient, resulting in lower energy bills for the building owner.

Secondly, rigid foam insulation is water-resistant, making it ideal for use in cavity walls. This means that it will not absorb moisture, preventing the growth of mould and mildew. Moisture can also cause other problems such as structural damage to the building, so using rigid foam insulation can help to prevent this.

Thirdly, rigid foam insulation is easy to install. It can be cut to size and inserted into the cavity between the two walls. The foam will then expand to fill the space, providing a tight and effective insulation layer. This makes it a popular choice for new construction projects as well as retrofitting existing buildings.

Finally, rigid foam insulation is durable and long-lasting. It will not degrade over time, so it will continue to provide effective insulation for the life of the building. This means that it is a cost-effective solution for building owners as they will not need to replace the insulation in the future.

Using rigid foam insulation in cavity walls is an excellent way to improve the energy efficiency of buildings. It provides a higher level of insulation, is water-resistant, easy to install and long-lasting. If you are building a new property or renovating an existing one, consider using rigid foam insulation in your cavity walls to improve energy efficiency and reduce your energy bills.


Cavity Wall with Reflective Insulation


Cavity walls with reflective insulation are constructed by adding a reflective material, such as foil, to the cavity between the walls. This type of insulation reflects heat back into the building, which can improve energy efficiency. However, reflective insulation can be sensitive to moisture, so it’s important to ensure that it’s installed correctly to avoid any problems with dampness or mould growth.

Reflective insulation consists of a thin layer of aluminium foil laminated to a layer of polyethylene bubble wrap or foam board. This insulation is ideal for cavity walls because it reflects heat away from the building, keeping it cool in the summer and warm in the winter.

Reflective insulation works by reflecting radiant heat, which is the type of heat that travels in waves, rather than convection or conduction. When sunlight hits a building, it heats up the roof and walls, which then radiate the heat into the interior. Reflective insulation reflects this heat away, keeping the building cooler.

One of the main benefits of reflective insulation in cavity walls is its ability to improve energy efficiency. Reflective insulation can reduce energy consumption by up to 40% by reducing the amount of heat transferred into the building. This means that homeowners can save money on their energy bills while also reducing their carbon footprint.

Another benefit of reflective insulation is that it is easy to install. It can be cut to size and inserted into the cavity between the walls, where it will remain in place. This makes it an ideal option for both new construction and retrofitting existing buildings.

Reflective insulation is also highly durable, and it will not degrade over time. This means that it can last for the life of the building, providing consistent energy efficiency for years to come.

Reflective insulation is an excellent choice for cavity walls. It provides excellent energy efficiency, is easy to install, and highly durable. Homeowners looking to improve the energy efficiency of their homes should consider reflective insulation for their cavity walls. By reducing energy consumption, reflective insulation can save homeowners money while also helping to reduce their carbon footprint.

In conclusion

Cavity walls offer many benefits, including improved insulation, energy efficiency, and soundproofing. The type of cavity wall you choose will depend on the specific needs of your building, as well as your budget and other factors. By understanding the different types of cavity walls available, you can make an informed decision and ensure that your building is constructed to the highest standards of quality and efficiency.