Cavity wall insulation is available in a variety of insulation materials and is compressed into durable slabs. The chosen insulation material will depend on the area being insulated and what the insulation is required for. We sell a variety of cavity wall insulation products from top brands.
Cavity Wall Insulation
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Kingspan Kooltherm K118 42.5mm Insulated Plasterboard (2400 x 1200mm) – 51.84m2 pallet
£1,200.00 ex VAT90mm Thermaclass Cavity Wall 21 – Celotex Thermaclass (1190mm x 450mm x 90mm) – 3.21m2 (Pack of 6)
£79.99 ex VAT
Kingspan Kooltherm K118 57.5mm Insulated Plasterboard (2400 x 1200mm) – 40.32m2 pallet
£1,099.00 ex VAT
Recticel Eurowall Plus Full Fill Cavity Wall Insulation Board (1190mm x 450mm) – 115mm – 4.32m2 pack
£145.00 ex VAT
Recticel Eurowall Plus Full Fill Cavity Wall Insulation Board (1190mm x 450mm) – 140mm – 4.32m2 pack
£165.00 ex VAT
Recticel Eurowall Plus Full Fill Cavity Wall Insulation Board (1190mm x 450mm) – 90mm – 5.4m2 pack
£145.00 ex VATWhat is the difference between cavity slabs and cavity boards?
Cavity boards and cavity slabs are both types of insulation that are used to fill the empty space between the inner and outer walls of a building, known as a cavity. The main difference between the two is the material they are made of and the method of installation.
Cavity boards are made of rigid insulation material and are installed in the cavity by being cut to the appropriate size and shape, then inserted and secured in place. They are typically made of materials such as polystyrene or polyurethane and are available in different thicknesses to suit different needs. Cavity boards are ideal for use in new builds and as part of a retrofit insulation project. They are also suitable for use in solid walled properties, which do not have a cavity.
Cavity slabs, on the other hand, are made of a flexible insulation material and are installed by blowing the insulation material into the cavity using specialized equipment. The insulation material used in cavity slabs is typically made of cellulose, mineral wool, or polyurethane foam. Unlike cavity boards, cavity slabs do not need to be cut to size, making them a more flexible and versatile insulation option. Cavity slabs are ideal for use in existing properties as they can be installed without disturbing the internal decor.
Both cavity boards and cavity slabs have their own advantages and disadvantages. Cavity boards offer a higher thermal resistance, and are less likely to settle or compress over time, which can affect their insulation properties. They are also ideal for use in properties where access to the cavity is limited. However, cavity boards can be more difficult to install and require a higher level of skill to ensure they are securely fitted.
Cavity slabs, on the other hand, are easy to install and are a good option for properties where access to the cavity is limited. They are also less disruptive to install, as they can be installed without the need to disturb the internal decor of the property. However, cavity slabs are not as effective as cavity boards and may settle over time, which can affect their insulation properties.
In conclusion, both cavity boards and cavity slabs are effective options for insulating the cavities in a building, but the choice between them will depend on the specific needs of the property and the desired level of insulation. It is important to consult a professional insulation contractor to determine the most suitable option for your property.
How is cavity wall insulation installed?
Cavity wall insulation can be installed in a variety of methods.
Its can be fitted into joists or rafters in the building, it can be installed into stud walls, or in layered insulation, and masonry partial fill applications. The method used depends on the area being insulated.
How to insulate cavity wall slabs into masonry partial fill cavity walls
When installing cavity wall insulation into a new build or extension, cavity wall slabs are recommended. The slabs should be fitted between the building's outer leaf (breeze blocks) and inner leaf (brickwork) and should be installed as the walls are being built and should start between 100mm and 300mm beneath floor level. It can be held into place using wall ties.
Each board should be secured with a minimum of three wall ties and extra wall ties should be applied around windows and door frames. At all horizontal and vertical joints where slabs are butted together and board edges, suitable tape should be applied. This will provide your building with excellent thermal quality and will last for as long as the building does.
How to insulate cavity wall slabs into a timber frame wall
When installing cavity wall insulation into a wall ensure all timber is installed and all studs and rails are sitting flush with nothing jutting from the wall. Then insert the insulation boards into the frames pushing back the plywood sheathing. If necessary, cut the cavity boards to size to fit firmly into the stud walls. Ensure the wall insulation continues with the floor perimeter.
Use any leftover boards for infill panels and use any cut-offs to fill any gaps in the wall. Foil tape can be applied over any joints or boards butted together to provide extra protection from thermal bridging. Then install a vapor control layer over the warm side of the stud work.
Then apply plasterboard lining over the vapor control layer using suitable plasterboard fastenings.
Building Regulations
The limiting U-value for walls in new dwellings is 0.3 W/m2K
The U-value for buildings other than dwellings is 0.35 W/m2K
Where new thermal elements are constructed, such as in a new extension, they should be at least 0.28 W/m2K
Why use cavity wall insulation?
Cavity wall insulation will prevent heat escaping through the walls. It keeps your property warmer in the winter and cooler in the summer. Different types of cavity wall insulation are available to suit every need such as acoustic advantages, safety measures and thermal efficiency. These components will make your living or working space a more comfortable environment. It also means lower monthly energy bills and making your residential building more energy efficient.
When installing cavity wall insulation remember to take the buildings fixtures and fitting into consideration as it can increase or decrease the wall depth. This can affect factors such as the space in the room. Also take safety measures to ensure insulation is fitted correctly around electrical sockets, wires and ventilation spaces, or the correct procedures are put into place to remove these components.
Always consult a building professional when insulating your walls to prevent the wrong insulation being installed and the possibility of damaging your property. Insulation being applied to existing damage such as mould, wood rot, or damp it can worsen the condition.
ROCKWOOL RWA45
Rockwool RWA45 insulation are high-quality resin bonded slabs. They are available in a variety of densities and thicknesses to suit your properties requirements. They provide excellent acoustic, thermal, and fire performance and can be applied to variety of uses such as in walls, ceilings, floors, roofs and so on. They can also be used for soundproofing purposes. They have a thermal conductivity of 0.035 W/mK.
KINGSPAN K106
Kingspan Kooltherm K106 Cavity Board is made of premium performance insulation with a fibre-free rigid thermoset phenolic core. It also has a low emissivity composite foil bonded to one side which is the inner facing and should be applies to the inner leaf of the building structure. It has a thermal conductivity of 0.018W/mK and is available in widths from 90mm and 125mm.
CELOTEX CAVITY WALL BOARD
Celotex CW4000 is an insulation board specifically designed for partial fill cavity wall applications. CW400 is made from rigid polyisocyanurate and has a low emissivity foil facing bonded to one side. It has a thermal conductivity of 0.022W/mK.
Other cavity wall insulation materials include frametherm slabs and acoustic slabs.
How Cavity Wall Insulation Works?
Cavity wall insulation involves filling the gap between the inner and outer walls of a property with an insulating material. The primary purpose of this insulation is to create a barrier that prevents heat from escaping through the walls. This process helps to maintain a comfortable temperature inside the house, regardless of the external weather conditions.
The insulation material used for cavity walls is typically a special foam made of polystyrene beads or mineral wool. These materials have excellent insulating properties and are capable of trapping air within their structure. The air pockets formed in the insulation material act as a barrier, preventing the transfer of heat from the inside to the outside and vice versa.
Cavity wall insulation is suitable for both new and existing buildings. For new constructions, the insulation is installed during the building process. However, for older homes without existing insulation, retrofitting can be done by drilling small holes in the external walls and injecting the insulation material into the cavity.
On our website, we sell both cavity wall insulation boards as well as cavity wall insulation slabs.
Benefits of Cavity Wall Insulation
Cavity wall insulation is a simple and cost-effective way to improve the energy efficiency of your home or building. By filling the empty space between the inner and outer walls of a building, cavity wall insulation can help to reduce heat loss and lower heating costs.
One of the primary benefits of cavity wall insulation is energy savings. During the winter, warm air inside your home can escape through the walls, causing your heating system to work harder to maintain a comfortable temperature. This can lead to higher energy bills. By insulating your walls, you can reduce the amount of heat that is lost, which can lead to significant savings on your energy bills.
Another benefit of cavity wall insulation is improved thermal efficiency. Insulating your walls can help to keep the warm air inside your home, making it more comfortable to live or work in. This can be especially beneficial in older homes or buildings that may not have been designed with energy efficiency in mind.
Cavity wall insulation can also help to reduce noise transmission through the walls. This can be especially beneficial if you live in a busy or noisy area, or if you have neighbours ors who are particularly loud. By reducing the amount of sound that can pass through the walls, cavity wall insulation can help to create a more peaceful and comfortable living or working environment. For more information on why you should use Cavity Wall Insulation, you should visit the Energy Saving Trust's article on Cavity Wall Insulation.
In addition to these benefits, cavity wall insulation can also have a positive impact on the environment. By reducing energy consumption, insulation can help to lower greenhouse gas emissions and contribute to a more sustainable future.
Installing cavity wall insulation is a relatively simple and straightforward process. It can be done by a professional insulation contractor, and many companies offer free or low-cost assessments to determine whether your home or building is suitable for insulation.
Overall, cavity wall insulation is a cost-effective and easy way to improve the energy efficiency of your home or building. It can lead to energy savings, improved thermal efficiency, reduced noise transmission, and a positive impact on the environment. If you're looking to improve the energy efficiency of your home or building, consider installing cavity wall insulation.
We take pride in providing the nation with cheap cavity insulation. Our motto is top brands at trade prices. We are a dedicated supplier of insulation, which means we save money by dealing with bulk orders. This saving we pass directly onto our customers, which is why we can offer the best price on cavity insulation.
