Where to buy cavity wall insulation?

You can purchase cavity wall insulation online at Insulation Wholesale. We supply an extensive range of partial and full fill cavity wall insulation products for both trade and DIY use. Order online to get a fast quote and volume discounts on pallet quantities, with fast delivery across the UK.

How much does cavity wall insulation cost?

You may pay £15–£30 per square metre of insulation, which varies depending on the region, building type, and insulation material. For an average three-bedroom semi-detached house, you could spend around £700–£1,500 for professional installation. If your property has an unusual wall structure, it may require extra labour, which could raise the overall cost. Avoid unusually low quotes, as poor installation could lead to cold bridging or damp, which may cost more to fix later.

How does cavity wall insulation work?

Insulation for cavity walls is usually made from polystyrene beads, mineral wool or foam. The material is installed in the cavity between the two wall layers to create a barrier that slows down heat transfer. Professional installers often perform a post-installation check using thermal imaging to ensure full coverage.

How does cavity wall insulation reduce heat loss?

When a cavity wall is uninsulated, air moves freely between the wall’s layers. The rate of heat transfer is high as warm air passes through unhindered. Once you fill this space with insulation, air movement is restricted, and heat transfer by radiation and convection is significantly reduced. The insulation traps still air, which acts as a thermal barrier and locks heat inside. So the building stays warmer for longer and requires less energy for heating.

Can cavity wall insulation be removed?

Yes, it can be removed. Removal is typically done when the: Original insulation was incorrectly installed. Wrong insulant was used. Insulation has settled or degraded over time. Property suffers from water ingress or dampness. You need a vacuum extraction system to draw out the insulation through tiny holes drilled in the outer wall. Because of the complexity of the process, it should only be carried out by a professional to avoid damaging the brickwork.

What does cavity wall insulation look like?

Mineral wool insulation is soft, fluffy, and fibrous, and it can appear white or yellowish. Polystyrene beads look like small white balls, similar to foam pellets. Foam insulation expands into a pale yellow or cream semi-solid layer once injected. The insulation is concealed within the cavity and can be confirmed via inspection holes or a borescope survey.

What cavity wall insulation is best?

The best cavity wall insulation depends on the type of property, local weather conditions and budget. Each material offers unique benefits, so choose the one that suits your home’s structure and level of exposure to the elements. Generally, you’ll be choosing from mineral wool, polystyrene and foam options. Mineral wool delivers excellent thermal efficiency, sound insulation and fire resistance. But it can retain moisture, so it’s not ideal for walls exposed to heavy rain without proper weatherproofing. Polystyrene bead insulation combines excellent thermal performance and water resistance, so it is perfect for walls exposed to moisture. The beads flow easily around pipes and corners, nicely filling all spaces. Though more expensive, foam insulation combines superior thermal performance and strength. It expands to fill small gaps and irregular cavities, making it ideal for narrow and hard-to-fill wall cavities. Foam insulation should only be installed by certified professionals due to its chemical expansion properties.

Cavity Wall Insulation At Low Wholesale Price

100mm Celotex CW4100 Cavity Wall Insulation Board 1200mm x 450mm 3.24m2 Pack of 6 (3.24m2)

Celotex-Partial-Fill-Caivty-Board-Pack-of-6

100mm Celotex CW4100 Cavity Wall Insulation Board 1200mm x 450mm 3.24m2 Pack of 6 (3.24m2)

100mm Celotex CW4100 Cavity Wall Insulation Board is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing.

£64.02£76.82 Ex VATInc VAT
£19.76£23.71 Per M2

Cavity Wall Insulation

What is cavity wall insulation?

Cavity batts vs cavity foam boards

It is one of the cheapest energy saving measures for homeowners

Energy bills reduction

Keeps your home warmer

Reduction in carbon footprint

Mould prevention

Easy and quick to install

FAQ

Where to buy cavity wall insulation?

How much does cavity wall insulation cost?

How does cavity wall insulation work?

How does cavity wall insulation reduce heat loss?

Can cavity wall insulation be removed?

What does cavity wall insulation look like?

What cavity wall insulation is best?

Products in Cavity Wall Insulation

100mm Celotex CW4100 Cavity Wall Insulation Board 1200mm x 450mm 3.24m2 Pack of 6 (3.24m2)

100mm Kingspan Kooltherm K108 Cavity Board Insulation 1200mm x 450mm Pack of 5 (2.70m2)

100mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 10 (5.40m2)

100mm Superglass Superwall 32 Cavity Wall Slab 3.28m2 Pack

100mm Superglass Superwall 36 Cavity Wall Slab 4.37m2 Pack

100mm URSA 32 Cavity Wall Insulation Slab 3.07m2 Pack

100mm URSA 35 Cavity Wall Insulation Slab 3.69m2 Pack

115mm Celotex Thermaclass Cavity Wall 21 Insulation Board 1190mm x 450mm Pack of 5 (2.67m2)

115mm Kingspan Kooltherm K106 Cavity Board Insulation 1200mm x 450mm Pack of 4 (2.16m2)

115mm Recticel Eurowall Full Fill Cavity Wall Insulation Board 1200mm x 460mm Pack of 8 (4.41m2)

125mm Superglass Superwall 32 Cavity Wall Slab 2.18m2 Pack

125mm Superglass Superwall 36 Cavity Wall Slab 3.28m2 Pack

125mm URSA 32 Cavity Wall Insulation Slab 2.46m2 Pack

125mm URSA 35 Cavity Wall Insulation Slab 3.07m2 Pack

140mm Recticel Eurowall Full Fill Cavity Wall Insulation Board 1200mm x 460mm Pack of 8 (4.41m2)

150mm Superglass Superwall 32 Cavity Wall Slab 2.18m2 Pack

150mm Superglass Superwall 36 Cavity Wall Slab 3.28m2 Pack

150mm URSA 35 Cavity Wall Insulation Slab 2.46m2 Pack

50mm Celotex CW4050 Cavity Wall Insulation Board 1200mm x 450mm 5.94m2 Pack of 11 (5.94m2)

50mm Kingspan Kooltherm K108 Cavity Board Insulation 1200mm x 450mm Pack of 10 (5.40m2)

50mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 20 (10.80m2)

60mm Celotex CW4060 Cavity Wall Insulation Board 1200mm x 450mm 5.4m2 Pack of 10

60mm Kingspan Kooltherm K108 Cavity Board Insulation 1200mm x 450mm Pack of 8 (4.32m2)

60mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 16 (8.64m2)

70mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 14 (7.56m2)

75mm Celotex CW4075 Cavity Wall Insulation Board 1200mm x 450mm 4.32m2 Pack of 8 (4.32m2)

75mm Kingspan Kooltherm K108 Cavity Board Insulation 1200mm x 450mm Pack of 6 (3.24m2)

75mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 12 (6.48m2)

75mm Superglass Superwall 32 Cavity Wall Slab 4.37m2 Pack

75mm URSA 35 Cavity Wall Insulation Slab 4.91m2 Pack

80mm Recticel Eurowall Partial Cavity Wall Insulation Board 1200mm x 450mm Pack of 12 (6.48m2)

85mm Superglass Superwall 36 Cavity Wall Slab 4.37m2 Pack

90mm Celotex Thermaclass Cavity Wall 21 Insulation Board 1190mm x 450mm Pack of 6 (3.21m2)

90mm Ecotherm Eco-Cavity Full Fill Insulation Board Tongue And Groove 1200mm x 450mm Pack of 4 (2.16m2)

90mm Kingspan Kooltherm K106 Cavity Board Insulation 1200mm x 450mm Pack of 4 (2.16m2)

90mm Recticel Eurowall Full Fill Cavity Wall Insulation Board 1200mm x 460mm Pack of 10 (5.52m2)