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Wall Insulation Board

Wall insulation boards are perfect for people who want to reduce their energy consumption. We stock internal wall insulation and external wall insulation boards that are made from materials that have low thermal conductivity values. Our PIR and phenolic wall insulation will trap heat inside your home and improve the thermal envelope of your property. Invest in our range of partial and full-fill cavity wall insulation to improve your home in time for winter.

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What Are Wall Insulation Boards

The term ‘wall insulation boards’ covers any insulation board that is intended for installation in a wall. Lots of homeowners invest in insulation products to reduce the amount of energy that they lose through their walls, floors, and roofs. All insulation slabs, boards, and rolls have a thermal conductivity value that is measured in Watt per meter Kelvin (W/mK). The lower the value, the better the material will work to insulate a house or building and reduce heat loss, making it more energy efficient.

We stock insulation boards that are designed for both internal and cavity walls. Our customers can choose from general-purpose, partial fill, and full-fill boards to meet all their insulation needs.

Different Types of Wall Insulation Boards

There are two main materials that dominate the wall insulation board market. PIR and phenolic create the best wall boards because they have very low thermal conductivity values. Both materials are manufactured in similar ways but have slightly different properties.

PIR, or polyisocyanurate, is a closed-set thermoset polymer. In simple terms, PIR is a rigid foam. Manufacturers apply one layer of wet PIR foam to a facing. The foam expands and adheres itself to another facing. Manufacturers stop this process at different times depending on the thickness that they want to achieve. To complete the board, manufacturers cook it under immense heat. PIR insulation boards have a thermal conductivity value of 0.022 W/mK.

Kingspan use similar techniques to create phenolic insulation boards. They apply wet phenolic foam to a facing. The foam is tacky, and when it expands and dries it adheres itself to another facing. The last stage in the process involves cooking the board and curing it. Whereas PIR insulation is yellow, phenolic insulation is pink. It has a thermal conductivity value of 0.018 W/mK, making it the go-to choice for people who want the best wall insulation products on the market.

General Purpose Internal Wall Insulation Boards

General-purpose boards are designed for installation in internal walls. Celotex and EcoTherm are two of the most popular internal wall insulation board suppliers. Each board is 2400mm by 1200mm.

Celotex creates the best internal wall insulation products for people who want eco-friendly products that do not compromise on thermal performance. Celotex TB4000 boards contain environmentally friendly blowing agents and have zero ozone destruction potential. They are designed to eliminate thermal bridges. These rigid, lightweight boards are easy to handle and have a thermal conductivity value of 0.022 W/mK. 

They can be installed directly onto a wall or a stud wall can be constructed to apply.


Cavity Wall Insulation Boards

Homeowners lose around 35% of the heat in their homes through walls, which increase heating bills. Masonry walls are comprised of two walls with a space in between. The term cavity insulation refers to insulation that is designed to slot between masonry walls. Lots of people buy cavity insulation wall boards to ensure their homes stay cool in the summer and hot in the winter. Investing in masonry wall insulation also reduces energy bills.

We have lots of external wall insulation boards for sale. These 1200mm by 450mm boards are made from both PIR and phenolic foam. Kingspan creates one of the best insulation boards for exterior walls. Kingspan Kooltherm K108 partial-fill cavity boards are made from phenolic foam, which has an even better thermal conductivity value than PIR insulation. The K108 boards have a thermal value of 0.018 W/mK. Kooltherm boards are manufactured using a blowing agent that has a low global warming potential (GWP) and zero ozone destruction potential (ODP).

We also stock full-fill cavity wall insulation. Full-fill boards are ideal for people who need to install insulation quickly. You can simply slot the boards in place, without having to leave the air gap required in partial-fill walls. The boards are held in place by the masonry walls, meaning you do not need to spend time and money securing them.

Frequently Asked Wall Insulation Boards Questions

How to Fit Wall Insulation Boards?

One of the most common questions that customers ask us is how to fit wall insulation boards. Whether you are installing internal or external wall insulation boards, you need to choose an effective method.
When insulating interior walls, we encourage people to steer clear of the traditional wet plaster technique as it is not suitable for direct application to boards. The dot and dab technique is a far quicker and more effective option when installing insulation on a masonry wall. It involves applying dots and dabs of adhesive directly to the wall. This technique is proven to work and can hold insulation boards with ease.
Always consult with a professional for detailed guidance.

How to Fit Insulation Board to External Walls?

External wall insulation has thermal properties and can also protect your property from the elements. It is most common on commercial buildings that need to meet rigid legal requirements. We stock the best solutions for external wall insulation. Kingspan is one of the leading wall insulation board suppliers. They are the only manufacturer of phenolic insulation in the UK. Kingspan Kooltherm K5 is designed for installation on external solid walls alongside traditional and lightweight polymer modified renders.
Unqualified homeowners should not attempt to install exterior wall insulation themselves. There are lots of stages in the installation process that require specialist knowledge and experience. Professionals can conduct the appropriate render tests and protect your windows during the process.

Where Can I Shop Online for Wall Insulation Boards?

You can buy insulation wall boards directly from our online shop. We have one of the widest ranges of general-purpose boards in the UK. You can buy general-purpose internal wall insulation boards from the EcoTherm Eco-Versal range. Kingspan Kooltherm K108 is ideal for cavity wall insulation and is available in a range of thicknesses from 50mm to 100mm.
Our online shop is an easier, quicker alternative to brick and mortar construction supply shops. We can deliver internal wall insulation and external boards straight to your home or commercial construction site.
We also stock wall insulation roll here.