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Discover our wide range of wall insulation available at Trade Insulations. We stock top brands of insulation for walls at trade prices. The best part is, you don’t need to be in the trade to get the best prices. As a dedicated supplier of insulation, we pass our savings directly on to you. You can purchase a wide variety of insulation for walls in minutes. This includes both external and internal wall insulation as well as stud wall insulation and cavity insulation. On our website we sell all types of insulation for walls. This includes PIR boards as well as mineral wool slabs.

Trade Insulations is the go to place all your wall insulation needs in the UK. Whether you’re a homeowner looking to improve energy efficiency or a contractor seeking top-quality insulation materials, we have you covered. With a wide range of cutting-edge products from leading manufacturers, we are committed to providing sustainable and cost-effective solutions to keep your property warm, cosy, and eco-friendly. Explore our user-friendly website, find the perfect insulation materials tailored to your requirements, and embark on a journey towards a more energy-efficient future. Trust Trade Insulations for excellence in service and insulation expertise.

Below you can filter between the different types of wall insulation categories as well as products. The product pages feature full descriptions as well as technical information and data sheets so that you can be well informed when purchasing insulation from us. We offer express delivery on a wide range of our products. Get insulation delivered straight to your home or site – it could not be easier.

POPULAR
25% OFF
-25%
Celotex PIR Insulation Board

Celotex 100mm PIR Insulation Board – GA4100 (2400mm x 1200mm x 100mm) 2.88m2

£29.99 ex VAT
POPULAR
Acoustic Insulation Roll

100mm Knauf Acoustic Roll – (2x 600mm) – 12.36m2 roll

£54.99 ex VAT
POPULAR
25% OFF
Recticel Insulation Board

100mm Recticel GP Insulation Boards (1200x2400mm) – 2.88m2

£29.99 ex VAT
POPULAR
Bulk Plasterboard by Knauf

12.5mm Plasterboard – Knauf Wallboard (12.5mm x 2400mm x 1200mm) (2.88m2) Tapered Edge

£9.30 ex VAT
POPULAR
14% OFF
Celotex Insulated Plasterboard

Celotex 37.5mm Insulated Plasterboard (2400mm x 1200mm x 37.5mm) – PL4025

£34.99 ex VAT
Celotex Cavity Wall Insulation Boards

Celotex CW4100 100mm Cavity Wall Board (1200mm x 450mm) – 3.24m2 pack

£46.64 ex VAT
Kingspan K118 Insulation Board

Kingspan Kooltherm K118 37.5mm Insulated Plasterboard (2400 x 1200mm) – 2.88m2

£65.00 ex VAT
Acoustic Insulation Roll

Knauf 25mm Acoustic Roll (2x600mm) – 26.64m2 roll

£43.40 ex VAT
POPULAR
22% OFF
Knauf Dritherm 32 Ultimate Slab

Knauf Dritherm 32 100mm Ultimate Cavity Slab (1200mm x 455mm) – 3.27m2 pack

£31.99 ex VAT
POPULAR
22% OFF
Knauf Dritherm 37 Cavity Slabs

Knauf Dritherm 37 100mm Standard Cavity Slab (1200mm x 455mm) – 6.55m2 pack

£30.99 ex VAT
POPULAR
Rockwool RW6 Slabs

Rockwool 100mm RWA45 Acoustic Insulation Slab (1200 x 600mm) – 2.88m2 pack

£23.05 ex VAT
Rockwool Flexi Slab

ROCKWOOL Flexi – 1200 x 400 x 100mm – 86.4m2 pallet

£837.35 ex VAT
Rockwool Flexi Slab

ROCKWOOL Flexi Slab – 1200 x 600 x 100mm – 4.32m2 pack

£39.56 ex VAT
POPULAR
26% OFF
Celotex PIR Insulation Board

120mm Celotex Insulation Board – XR4120 (2400mm x 1200mm x 120mm) 2.88m2

£38.39 ex VAT

25mm Recticel GP Insulation Boards (1200x2400mm) – 2.88m2

£12.19 ex VAT
POPULAR
29% OFF
Celotex PIR Insulation Board

50mm Celotex Insulation Board – GA4050 (2400mm x 1200mm x 50mm) 2.88m2

£17.75 ex VAT

Insulation for walls

Insulation for walls can be used to improve the thermal performance of a building. The purpose of wall insulation is to reduce heat transfer, making the interior spaces more energy-efficient and comfortable.

There are various types of wall insulation materials available on our website. This includes PIR boards and fiberglass. These materials work by trapping air pockets, which act as insulating layers and prevent heat from escaping or entering the building.

Insulation for walls is an essential component of energy-efficient construction and renovations, helping to maintain stable temperatures and improve the overall energy performance of buildings.

Rigid foam boards, also known as PIR insulation, are manufactured from polyisocyanurate. These boards provide high thermal resistance and are often can be used for multiple purposes. For example, the Celotex PIR range can be used in walls as well as floors and roofs.

Other common wall insulation materials include fiberglass or mineral wool. Fiberglass is a lightweight and cost-effective option, which consists of fine glass fibers. These fibers create an effective thermal barrier. It is easy to install and can fit snugly between wall studs or in wall cavities. Mineral wool is slightly different as it is made from natural or synthetic fibers, which are derived from minerals. Rockwool is a known manufacturer of mineral wool insulation. Both fiberglass and mineral wall offer great fire resistance and sound absorption properties, making them ideal for both thermal and acoustic insulation. Additionally, it is said that mineral wool is resistant to mould and pests, ensuring a healthier indoor environment.

Insulated walls can contribute to a quieter and more peaceful indoor environment by blocking external noise pollution in addition to having thermal qualities.

If you are looking to insulate a wall, we have every product you would need to achieve this.

How to Insulate a Wall with PIR Boards

Insulating walls with PIR insulation boards is a good decision that can lead to substantial energy savings and a more comfortable indoor environment. An architect or building professional should be able to offer advice on which product/s you need. A professional can help you determine the thickness required for your boards.

Once you have purchased your wall insulation from us, you will need to gather additional equipment and PPE. This includes gloves, goggles, wall ties, measuring tape, a utility knife and mechanical fasteners.

The type of install will depend on the application so we recommend reading the manufacturers guide. Installing PIR cavity wall insulation, you would do the following:

  • Position wall ties one course below the damp proof course, 600mm apart horizontally.
  • Install subsequent rows of ties at 450mm intervals vertically and 900mm horizontally if possible.
  • Secure the insulation boards between the ties using retaining clips.
  • Ensure full and cut boards are held by at least three ties around their perimeters.
  • Use insulated cavity closers for windows, doors, or openings.
  • For cavities below the DPC level, use mechanical fixings to secure the boards.

If you were to upgrade solid walls with insulated plasterboard, then you could use the dot and dab method below:

  • Apply adhesive at skirting, ceiling level, and openings for a continuous seal. Alternatively, use thin timber battens at perimeter edges.
  • Align the insulation against adhesive and secure it in place. Add more adhesive if needed, following the manufacturer's instructions.
  • After the adhesive sets, apply secondary fixings to the insulated plasterboard as per manufacturer recommendations.
  • Ensure tight alignment of board joints and use appropriate tape and joint material to create a vapor control layer.

Wall Insulation Slabs

Insulation slabs are often used in cavities to improve both thermal and acoustic performance. Cavity wall insulation slabs are designed to fill the air gaps or cavities between the inner and outer walls of a building. These slabs are usually made of materials like mineral wool or fiberglass. They create a thermal barrier to improve performance. These insulation slabs can be easily slotted into the relevant cavity space. See the video below, which compares the install of PIR boards vs Knauf Dritherm Slabs:

The benefits of insulating walls

Insulating walls offers numerous benefits, which we have outlined below:

  1. Insulating walls creates a thermal barrier that can improve thermal performance of the building.
  2. Wall insulation can help people to save money on their energy expenses. Over time, the cost savings can offset the initial investment in insulation.
  3. Properly insulated walls contribute to a more comfortable indoor environment. Insulation minimises drafts, cold spots, and temperature fluctuations, creating a consistent and pleasant living space.
  4. Using insulation with acoustic properties can help reduce noise pollution and reduce sound travelling through walls.
  5. Insulation reduces the need for excessive energy consumption to heat a home. This means fewer greenhouse gas emissions therefore helps to build a more sustainable future.
  6. Wall insulation can reduce condensation and moisture build up causing damage to the building.
  7. Well insulated buildings tend to fetch a higher price on the property market.
  8. Building regulations in England mandate the use of insulation in new constructions or renovations. The use of wall insulation can help with compliance.
  9. Better temperature control can reduce the risk of temperature related health issues.

Please note that wall insulation properties will differ depending on the product. Ensure that you read the relevant data sheets.

Cheap Wall Insulation

If you need cost-effective wall insulation solutions, then you can order from us in no time at all. We take pride in offering a wide range of cheap wall insulation products online. With our competitive prices, you can achieve exceptional energy efficiency without it costing a fortune. We stock hundreds of products online and always offer our very best price.

It has never been easier to place an order and get your wall insulation delivered directly on site. In addition to this, our prices are considerably less than many well known builders merchants.

We offer various types of cheap wall insulation, including mineral wool, and rigid board insulation, suitable for different wall applications and insulation requirements. From cavity wall to stud wall insulation, we have everything you need.

Wall insulation is easy to install and can make a huge difference to the thermal performance of a building. At Trade Insulations, we only sell wall insulation products from best selling trusted brands such as Knauf or Celotex.

Whether you're insulating a new construction or upgrading an existing property, Trade Insulations has the right solution for you. Browse this page for cheap wall insulation products and find the perfect fit for your insulation needs.

If you have any questions or need help using our website, please feel free to get in touch with the team. Our friendly team will be happy to assist you.