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FULL FILL CAVITY

FULL FILL CAVITY

Full fill insulation simply fills the entire gap between outer and inner wall rather than leaving the traditional air void. Cavity insulation slabs fit closely against the brick and block of the wall construction. It means you’ll no longer have a void in the cavity to prevent moisture getting across to the inner leaf of the wall. The thickness of insulation to be fitted is dictated by the cavity width (typically 75mm or less). Full-fill built-in insulation solutions are installed as the walls are built, with slabs being friction-fitted between the inner and outer leaves of the wall and in between wall ties. There is a variety of products available for full fill cavity insulation: PIR, Glass Mineral Wool and Blown Insulation. This method of insulating has become more popular as insulation manufacturers have adopted new technology and methods to produce moisture resistant and suitable insulation for full fill cavity walls. Full-fill insulation can be slightly quicker to fit, as there’s less need to focus on how the material is held in place. It will also offer slightly better thermal performance over partial-fill for the same wall thickness. Put simply, with a 150mm cavity you’ll be able to include a full 150mm thickness of insulation; which is likely to net you a U-value of around 0.20 W/m2K on a typical brick and block setup when using a product such as Superwall 36 slab from Superglass. 

TYPES OF FULL FILL CAVITY INSULATION

Most common types of full fill cavity wall insulation are:

Phenolic core

It is a premium performance insulation with a fibre-free rigid thermoset phenolic core. Kingspan predicts a result of around 0.15-0.17 W/m2K when using 100mm of Kooltherm K106 in a 150mm cavity. However, rigid products are more expensive up front and installation can require more attention to detail on site.

Products:

Kingspan Kooltherm K106 Cavity Board

PIR core

PIR boards are made by mixing chemicals with a blowing agent. This forms large rigid blocks which are low density, closed cell insulation sheets. PIR boards tend to offer the optimum performance vs price ratio as they’re pretty close to phenolic boards when it comes to r-value and yet they’re cheaper. Although you will need a slightly thicker board to achieve the same r-value. 

Products:

Recticel Eurowall Plus Cavity Insulation Board ǀ Xtratherm CT/PIR CavityTherm Thin-R 

Mineral wool core

Cavity full fill insulation batts are non-combustible and contain water repellent additives which prevent moisture transmission between the outer and inner leaf. Mineral wool cavity insulation is not only waterproof, but lets the walls breathe deterring any unwanted moisture. The batts are simple to install and provide a close fit against brick and blockwork. 

Products:

ROCKWOOL® Full Fill Cavity Batts 

Superglass Superwall 32 Cavity Wall Batt

Superglass Superwall 36 Cavity Wall Batt

DriTherm 32 Knauf Ultimate Cavity Insulation Slab

DriTherm 34 Knauf Super Cavity Insulation Slab

DriTherm 37 Knauf Standard Cavity Insulation Slab

FULL FILL CAVITY SIZES

All boards are designed to fit between wall ties. Typically they are installed at 900mm horizontal x 450mm. For this reason all boards are made in standard size of 450mm/455mm x1200mm.
Cavity Slabs are available in a range of thicknesses: 50mm, 65mm, 75mm, 85mm, 90mm, 100mm, 115mm, 125mm, 140mm and 150mm.

 

FULL FILL CAVITY WALL INSULATION

· For cavities up to 100mm, install wall ties in the inner leaf at maximum 900mm horizontal centres and 450mm vertical centres, with additional ties around openings and at corners.

· For cavities greater than 100mm, wall ties should be installed at reduced centres.

· Wall ties must slope down from the inner leaf in order to shed water into the cavity.

· Continue building the inner leaf as you install wall ties, with ties secured by the next row of blockwork.

· Ensure the blockwork structure is kept clean as you build. The faces of masonry must be kept clean and clear of mortar snots and droppings.

· Once the wall ties are secured, the full fill insulation boards can be installed. Wall insulation boards must extend 150mm below the upper edge of floor insulation to prevent thermal bridging at the floor perimeter.

· Boards should be fitted tightly against the leading leaf of masonry supported on the first row of wall ties. The higher side of the rebated edge should always be against the inner leaf.

· Ensure each insulation board is fitted tight against the inner leaf and joints are tightly butted. Each board should be secured by wall ties at a minimum of three points.

· At corner junctions, the rebated edge should be carefully removed with a handsaw or knife to allow a straight butt joint with no gaps. The corner joint should be staggered and the exposed edge of the board should be protected by a vertical DPC of an appropriate width.

 

Related articles:

4 types of full fill cavity insulation explained

How to choose the right Kingspan insulation board for construction?

How to work out how many square metres of insulation I would need?

Cavity wall. All you need to know

Building regs part L changes. What is all about?

Best 6 passive fire protection cavity barriers.

All types of partial fill cavity insulation

Cheaper alternative/equivalent to kingspan insulation

 

 

 

Brand: Unilin Insulation (UK) known as Xtratherm Model: 110mm ECO/CT CavityTherm
110mm Unilin ECO/CT CavityTherm 360 is an engineered full fill cavity insulation system providing added resilience against increases in wind-driven rain resulting from climate change. When built into a traditional 110-150mm cavity using standard foundation widths and local building materials ECO/..
  • 110mm CavityTherm ECO/CT Unilin Full Fill Cavity Insulation Board
  • Unilin ECO/CT 360 (CavityTherm) achieves U-Values down to 0.12 W/m2K
  • Lambda value of 0.020 W/mK with pioneering environmentally sensitive features
  • Minimising the threat of Thermal Bridging and improving the U-Value of the wall
  • Meets both the Climate Challenge 2030 and Low Energy Transformation Initiative
£ 137.88
Ex Tax:£ 114.90
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 37 - 50mm
50mm Knauf DriTherm 37 Standard Cavity Insulation Slab is a non-combustible, water-repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.037W/mK for use in masonry full fill cavity wall applications. Dritherm37 Knauf Cavity Slab 50mm is a highly durable, odourles..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 40.28
Ex Tax:£ 33.57
Estimated delivery: 3-5 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 75mm CavityTherm Unilin
75mm Unilin CavityTherm CT/PIR Insulation Board is a high performance composite board of enhanced PIR with a lambda value of 0.021 W/mK, for full fill cavity wall applications. CavityTherm is proven to provide the most cost effective answer, not only reaching Future Homes Standard fabric U-Values..
  • 75mm CavityTherm Unilin Insulation for full fill cavity wall applications
  • CavityTherm is an innovative built-in insulation for traditional walls
  • CavityTherm achieves passive level U-Values as low as 0.12 W/m2K
  • Made of an enhanced PIR core with thermal conductivity of 0.021W/mK
  • CavityTherm Unilin is a continuous insulation system for full fill cavities
£ 103.34
Ex Tax:£ 86.12
Estimated delivery: 3-5 working days
Brand: Xtratherm® Model: 75mm CT/PIR
75mm Xtratherm CT/PIR CavityTherm Thin-R is a cost effective rigid polyisocyanurate thermal insulation board used for traditional full fill cavity walls to provide excellent U-Values and meet the Passive House standards. Xtratherm CT/PIR Cavity Wall insulation is a top-class composite board of en..
  • BBA Certification No. 10/4786.
  • Board coverage : 0.54m2
  • Pack coverage: 2.16m2
  • R-Value:  3.57m2K/W
  • Thermal Conductivity: 0.021 W/mk
£ 108.90
Ex Tax:£ 90.75
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 32 - 75mm
75mm Knauf Earthwool DriTherm 32 Ultimate Cavity Insulation Slab is a water-repellent glass mineral wool cavity insulation slab with a certified thermal conductivity of 0.032W/mK, used in external masonry full-fill cavity walls. Knauf Dritherm 32 Cavity Slab 75mm is a highly durable, odourless, r..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 47.86
Ex Tax:£ 39.88
Estimated delivery: 3-5 working days
Brand: Knauf® Model: DriTherm 34 - 75mm
75mm Knauf Earthwool DriTherm Super Cavity Slab 34 is a water repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.034W/mK for use in masonry full fill cavity wall applications. Dritherm 34 Cavity Insulation Slab 75mm is a highly durable, odourless, rot proof, n..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 43.92
Ex Tax:£ 36.60
Estimated delivery: 5-7 working days
Brand: Recticel® Model: 75mm Cavity
75mm Recticel Eurowall PLUS PIR Cavity Insulation Board is a high-performance polyisocyanurate rigid foam insulation board faced with a gas diffusion tight multilayer foil on both sides suitable for full fill cavity wall applications with a minimum residual cavity of 10mm, up to 25m in height. Eu..
  • Size: 1190mm x 450mm
  • Board coverage: 0.54m2
  • Thermal Conductivity: 0.022 W/mk
  • Tongue and Groove
  • BBA Certificate 02/3908
£ 19.88
Ex Tax:£ 16.57
Estimated delivery: 7-10 working days
Brand: Superglass® Model: Superwall 32 - 75mm
75mm Superglass Superwall 32 Cavity Wall Insulation Batt is a high performance, non-combustible, BBA approved and water repellent glass mineral wool insulation slab used in masonry full or partial fill cavity wall applications. Superglass Superwall 32 Cavity Wall Insulation Batts 75mm are highly ..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 77.33
Ex Tax:£ 64.44
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 36 - 75mm
75mm Superglass Superwall 36 Cavity Batt is a standard performance water repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.036W/mK for use in masonry full fill or partial fill cavity wall applications. Superglass Superwall 36 Cavity Wall Insulation Batts are ..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 60.02
Ex Tax:£ 50.02
Estimated delivery: 3-5 working days
Brand: URSA® Model: 75mm URSA TERRA 32
75mm URSA 32 Cavity Wall Insulation Batt is a non-combustible class A1 fire rated, semi rigid glass mineral wool slab treated with silicone water-repellent additive designed for use as either a full or partial fill masonry cavity wall insulation for buildings up to 25meters in height. URSA 32 Cav..
  • Non-combustible Class A1 Cavity Batt
  • Full or Partial Fill Masonry Cavity Walls
  • Semi rigid glass mineral wool cavity slab
  • Certified thermal conductivity of 0.032W/mK
  • BBA Certificate 09/4624 ǀ Density of 32 kg/m3
£ 76.22
Ex Tax:£ 63.52
Estimated delivery: 3-5 working days
Brand: URSA® Model: 75mm URSA TERRA 35
75mm URSA 35 Cavity Wall Batt is a non-combustible, A1 fire rated, semi rigid glass mineral wool cavity insulation slab with certified thermal conductivity of 0.035W/mK and density of 22kg/m3, used in full fill or partial fill external masonry cavity walls. URSA 35 Cavity Wall Insulation Batt 75m..
  • Non-combustible Class A1 Cavity Batt
  • Full or Partial Fill Masonry Cavity Walls
  • Semi rigid glass mineral wool cavity slab
  • Certified thermal conductivity of 0.035W/mK
  • BBA Certificate 09/4624 ǀ Density of 22 kg/m3
£ 67.50
Ex Tax:£ 56.25
Estimated delivery: 3-5 working days
Brand: Kingspan® Model: 80mm K106
80mm Kingspan Kooltherm K106 Cavity Insulation Board is an advanced full-fill cavity wall insulation board with an excellent thermal conductivity of 0.019 W/mK that achieves the same wall U-value as alternative products with a much thinner profile. K106 Cavity Board 80mm x 450mm x 1200mm is speci..
  • 80mm Kingspan Kooltherm K106 Cavity Board
  • Advanced full-fill cavity wall insulation board
  • Excellent thermal conductivity of 0.019 W/mK
  • Premium performance rigid thermoset fibre-free phenolic insulation
  • Water-tight polypropylene fleece and low emissivity composite foil
£ 119.88
Ex Tax:£ 99.90
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 34 - 100mm
100mm Knauf Earthwool DriTherm Cavity Slab 34 is a rigid glass mineral wool insulation slab with a certified thermal conductivity of 0.034W/mK for use in external masonry full fill cavity walls. DriTherm 34 Cavity Slab 100mm is an easy to install odourless, rot proof, non-hygroscopic insulation s..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 56.28
Ex Tax:£ 46.90
Estimated delivery: 5-7 working days
Brand: URSA® Model: 100mm URSA TERRA 35
100mm URSA 35 Cavity Wall Batt is an A1 non-combustible semi rigid glasswool cavity insulation slab with certified thermal conductivity of 0.035W/mK and nominal density of 22kg/m3, used in full fill or partial fill external masonry cavity walls. URSA 35 Cavity Wall Insulation Batt 100mm x 455mm x..
  • Non-combustible Class A1 Cavity Batt
  • Full or Partial Fill Masonry Cavity Walls
  • Semi rigid glass mineral wool cavity slab
  • Certified thermal conductivity of 0.035W/mK
  • BBA Certificate 09/4624 ǀ Density of 22 kg/m3
£ 66.56
Ex Tax:£ 55.47
Estimated delivery: 3-5 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 125mm ECO/CT CavityTherm
125mm Unilin CavityTherm ECO/CT is a bio-enhanced composite cavity wall insulation board made using enhanced rigid PIR insulation with engineered jointing and recyclable HIPs face. When built into a traditional 110-150mm cavity using standard foundation widths and local building materials ECO/CT ..
  • 125mm CavityTherm ECO/CT Unilin Full Fill Cavity Insulation Board
  • Unilin ECO/CT 360 (CavityTherm) achieves U-Values down to 0.12 W/m2K
  • Lambda value of 0.020 W/mK with pioneering environmentally sensitive features
  • Minimising the threat of Thermal Bridging and improving the U-Value of the wall
  • Meets both the Climate Challenge 2030 and Low Energy Transformation Initiative
£ 155.88
Ex Tax:£ 129.90
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 37 - 65mm
65mm Knauf DriTherm 37 is a standard non-combustible, water-repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.037W/mK for use in masonry full fill cavity wall applications. Knauf Cavity Slabs are highly durable, odourless, rot proof, non-hygroscopic, does not..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 41.38
Ex Tax:£ 34.48
Estimated delivery: 3-5 working days
Brand: Knauf® Model: DriTherm 32 - 85mm
85mm DriTherm 32 Ultimate Cavity Slab is a water-repellent glass mineral wool cavity insulation slab with a certified thermal conductivity of 0.032W/mK for use in external masonry full-fill cavity wall applications. Knauf Cavity Insulation Slab 85mm DriTherm 32 is a durable, odourless, rot proof,..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 46.52
Ex Tax:£ 38.77
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 32 - 85mm
85mm Superglass Superwall 32 Cavity Wall Insulation Batt is a non-combustible, BBA approved glass mineral wool insulation slab with a certified thermal conductivity of 0.032W/mK, used in masonry full or partial fill cavity wall applications. Superglass Superwall 32 Cavity Wall Insulation Batt 85m..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 83.09
Ex Tax:£ 69.24
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 36 - 85mm
85mm Superglass Superwall 36 Cavity Insulation Batt is a BBA approved, water repellent glass mineral wool cavity insulation slab with a certified thermal conductivity of 0.036W/mK, used in masonry full or partial fill cavity wall applications. Superglass Superwall 36 Cavity Wall Insulation Batt 8..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 58.13
Ex Tax:£ 48.44
Estimated delivery: 3-5 working days
Brand: URSA® Model: 85mm URSA TERRA 32
85mm Cavity Wall Insulation Batt URSA 32 is an A1, non-combustible semi rigid glass mineral wool cavity slab with silicone water repellent additive used as either a full or partial fill masonry cavity wall insulation for buildings up to 25meters in height. URSA 32 Cavity 85mm is manufactured in 1..
  • 85mm URSA 32 Cavity Wall Insulation Batts A1
  • Full or Partial Fill Masonry Cavity Walls Insulation
  • Glass mineral wool cavity slab Non-combustible
  • Certified thermal conductivity of 0.032W/mK
  • BBA Certificate 09/4624 ǀ Density of 32 kg/m3
£ 81.90
Ex Tax:£ 68.25
Estimated delivery: 3-5 working days
Brand: Xtratherm® Model: 90mm CT/PIR
90mm Xtratherm CT/PIR CavityTherm Thin-R is a cost effective rigid PIR (polyisocyanurate) thermal insulation board used for traditional full fill cavity walls to provide excellent U-Values and meet the Passive House standards. Xtratherm CT/PIR Cavity Wall insulation is a top-class composite board..
  • BBA Certification No. 10/4786.
  • Board coverage : 0.54m2
  • Pack coverage: 2.16m2
  • R-Value:  4.07m2K/W
  • Thermal Conductivity: 0.021 W/mk
£ 123.23
Ex Tax:£ 102.69
Estimated delivery: 5-7 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 90mm CavityTherm Unilin
90mm Unilin CT/PIR CavityTherm is an innovative built-in insulation for traditional walls that achieves passive level U-Values as low as 0.12 W/m2K in cavities less than 150mm wide. CavityTherm is proven to provide the most cost effective answer, not only reaching Future Homes Standard fabric U-V..
  • 90mm CavityTherm Unilin Insulation for full fill cavity wall applications
  • CavityTherm is an innovative built-in insulation for traditional walls
  • CavityTherm achieves passive level U-Values as low as 0.12 W/m2K
  • Made of an enhanced PIR core with thermal conductivity of 0.021W/mK
  • CavityTherm Unilin is a continuous insulation system for full fill cavities
£ 106.36
Ex Tax:£ 88.63
Estimated delivery: 3-5 working days
Brand: Kingspan® Model: 90mm K106
90mm Kingspan Kooltherm K106 Cavity Board (1200mm x 450mm) is a premium performance rigid thermoset fibre-free phenolic insulation core factory bonded to a water-tight, vapour-open polypropylene fleece and to a inner facing of a low emissivity composite foil. K106 Cavity Board 90mm is specificall..
  • 90mm Kingspan Kooltherm K106 Cavity Board
  • Advanced full-fill cavity wall insulation board
  • Excellent thermal conductivity of 0.019 W/mK
  • Premium performance rigid thermoset fibre-free phenolic insulation
  • Water-tight polypropylene fleece and low emissivity composite foil
£ 127.01
Ex Tax:£ 105.84
Estimated delivery: 5-7 working days
Brand: Recticel® Model: 90mm Cavity
90mm Recticel Eurowall PLUS PIR Cavity Insulation Board is a high-performance polyisocyanurate rigid foam insulation board faced with a gas diffusion tight multilayer foil on both sides suitable for full fill cavity wall applications with a minimum residual cavity of 10mm, up to 25m in height. Eu..
  • Size: 1190mm x 450mm
  • Board coverage: 0.54m2
  • Thermal Conductivity: 0.022 W/mk
  • Tongue and Groove
  • BBA Certificate 02/3908
£ 23.88
Ex Tax:£ 19.90
Estimated delivery: 7-10 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 100mm CavityTherm Unilin
100mm CT/PIR CavityTherm Unilin is a composite board of PIR core with gas tight facings with one face bonded to a profiled HIPS skin during manufacture to provide a drainage plane. CavityTherm is proven to provide the most cost effective answer, not only reaching Future Homes Standard fabric U-Va..
  • 100mm CavityTherm Unilin Insulation for full fill cavity wall applications
  • CavityTherm is an innovative built-in insulation for traditional walls
  • CavityTherm achieves passive level U-Values as low as 0.12 W/m2K
  • Made of an enhanced PIR core with thermal conductivity of 0.021W/mK
  • CavityTherm Unilin is a continuous insulation system for full fill cavities
£ 114.11
Ex Tax:£ 95.09
Estimated delivery: 3-5 working days
Brand: Xtratherm® Model: 100mm CT/PIR
100mm Xtratherm CT/PIR CavityTherm Thin-R is a cost effective rigid PIR (polyisocyanurate) thermal insulation board used for traditional full fill cavity walls to provide excellent U-Values and meet the Passive House standards. Xtratherm CT/PIR Cavity Wall insulation is a top-class composite boar..
  • BBA Certification No. 10/4786.
  • Board coverage : 0.54m2
  • Pack coverage: 2.16m2
  • R-Value:  4.52m2K/W
  • Thermal Conductivity: 0.021 W/mk
£ 159.12
Ex Tax:£ 132.60
Estimated delivery: 5-7 working days
Brand: Kingspan® Model: 100mm K106
Kingspan Kooltherm K106 Full Fill Cavity Board is a 100mm thick, premium performance rigid fibre-free phenolic insulation core factory bonded to a water-tight, vapour-open polypropylene fleece and to a inner facing of a low emissivity composite foil. The NHBC accepts the use of Kingspan Kooltherm..
  • 100mm Kingspan Kooltherm K106 Cavity Board
  • Advanced full-fill cavity wall insulation board
  • Excellent thermal conductivity of 0.019 W/mK
  • Premium performance rigid thermoset fibre-free phenolic insulation
  • Water-tight polypropylene fleece and low emissivity composite foil
£ 131.88
Ex Tax:£ 109.90
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 32 - 100mm
100mm Knauf Earthwool DriTherm 32 Ultimate Cavity Slab is a semi-rigid non-combustible glass mineral wool insulation material with a certified thermal conductivity of 0.032W/mK for use in masonry full fill cavity wall applications. Dritherm 32 Knauf Cavity Slab 100mm is a water reppelent, odourle..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 62.34
Ex Tax:£ 51.95
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 32 - 100mm
100mm Superglass Superwall 32 Cavity Insulation Batt is a BBA certified, water repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.032W/mK for use in masonry full or partial fill cavity wall applications. Superglass Superwall 32 Cavity Wall Insulation Slab 100m..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 82.66
Ex Tax:£ 68.88
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 36 - 100mm
100mm Superwall 36 Superglass Cavity Wall Batt is a water repellent glass mineral wool cavity insulation slab with a certified thermal conductivity of 0.036W/mK, used in masonry full or partial fill cavity wall applications. Superglass Superwall 36 Cavity Wall Insulation Batts are highly durable,..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 38.68
Ex Tax:£ 32.23
Estimated delivery: 3-5 working days
Brand: URSA® Model: 100mm URSA TERRA 32
100mm URSA 32 Cavity Wall Insulation Batt is a semi rigid glass mineral wool cavity slab with silicone water repellent additive designed for use in full fill or partial fill external masonry cavity wall insulation for buildings up to 25m in height. URSA 32 Cavity Slab is manufactured in 1200mm x ..
  • Non-combustible Class A1 Cavity Batt
  • Full or Partial Fill Masonry Cavity Walls
  • Semi rigid glass mineral wool cavity slab
  • Certified thermal conductivity of 0.032W/mK
  • BBA Certificate 09/4624 ǀ Density of 32 kg/m3
£ 80.86
Ex Tax:£ 67.38
Estimated delivery: 3-5 working days
Brand: Recticel® Model: 115mm Cavity
115mm Recticel Eurowall PLUS PIR Cavity Insulation Board is a high-performance polyisocyanurate rigid foam insulation board faced with a gas diffusion tight multilayer foil on both sides suitable for full fill cavity wall applications with a minimum residual cavity of 10mm, up to 25m in height. E..
  • Size: 1190mm x 450mm
  • Board coverage: 0.54m2
  • Thermal Conductivity: 0.022 W/mk
  • Tongue and Groove
  • BBA Certificate 02/3908
£ 25.88
Ex Tax:£ 21.57
Estimated delivery: 7-10 working days
Brand: URSA® Model: 125mm URSA TERRA 35
125mm URSA 35 Cavity Wall Batt is a semi rigid glasswool cavity insulation slab with certified thermal conductivity of 0.035W/mK and nominal density of 22kg/m3, used in full fill or partial fill external masonry cavity walls. URSA 35 Cavity Wall Insulation Batt 125mm x 450mm x 1200mm is an easy t..
  • Non-combustible Class A1 Cavity Batt
  • Full or Partial Fill Masonry Cavity Walls
  • Semi rigid glass mineral wool cavity slab
  • Certified thermal conductivity of 0.035W/mK
  • BBA Certificate 09/4624 ǀ Density of 22 kg/m3
£ 65.10
Ex Tax:£ 54.25
Estimated delivery: 3-5 working days
Brand: Knauf® Model: DriTherm 34 - 125mm
125mm Knauf Earthwool DriTherm Super Cavity Slab 34 is a non-combustible, water-repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.034W/mK for use in masonry full fill cavity wall applications. Dritherm 34 Cavity Slabs are highly durable, odourless, rot proof,..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 53.71
Ex Tax:£ 44.76
Estimated delivery: 5-7 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 150mm ECO/CT CavityTherm
150mm CavityTherm ECO/CT 360, a rigid Polyisocyanurate (PIR) core faced with low emissivity foil facings with engineered HIPS outer skin used for full fill cavity wall applications. When built into a traditional 110-150mm cavity using standard foundation widths and local building materials ECO/CT..
  • 150mm CavityTherm ECO/CT Unilin Full Fill Cavity Insulation Board
  • Unilin ECO/CT 360 (CavityTherm) achieves U-Values down to 0.12 W/m2K
  • Lambda value of 0.020 W/mK with pioneering environmentally sensitive features
  • Minimising the threat of Thermal Bridging and improving the U-Value of the wall
  • Meets both the Climate Challenge 2030 and Low Energy Transformation Initiative
£ 167.88
Ex Tax:£ 139.90
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 37 - 75mm
75mm Knauf DriTherm 37 Standard Cavity Insulation Slab is a water-repellent glass mineral wool insulation slab with a thermal conductivity of 0.037W/mK, used in external full-fill masonry cavity walls. Dritherm 37 Knauf Cavity Slab 75mm is a highly durable, odourless, rot proof, non-hygroscopic, ..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 36.61
Ex Tax:£ 30.51
Estimated delivery: 3-5 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 110mm ECO/CT Internal Corner
110mm Internal Corner for Unilin ECO/CT CavityTherm 360 System is used as a part of full fill cavity wall insulation system to minimise the threat of Thermal Bridging. Unilin ECO/CT offers Lambda value (thermal conductivity) of 0.020 W/mK for full fill cavity wall applications along with pioneeri..
  • 110mm Internal Corner for CavityTherm ECO/CT Unilin Full Fill Cavity
  • Unilin ECO/CT 360 (CavityTherm) achieves U-Values down to 0.12 W/m2K
  • Lambda value of 0.020 W/mK with pioneering environmentally sensitive features
  • Minimising the threat of Thermal Bridging and improving the U-Value of the wall
  • Meets both the Climate Challenge 2030 and Low Energy Transformation Initiative
£ 137.88
Ex Tax:£ 114.90
Estimated delivery: 5-7 working days
Brand: Xtratherm® Model: 125mm CT/PIR
125mm Xtratherm CT/PIR CavityTherm Thin-R is a cost effective rigid PIR (polyisocyanurate) thermal insulation board used for traditional full fill cavity walls to provide excellent U-Values and meet the Passive House standards. Xtratherm CT/PIR Cavity Wall insulation is a top-class composite boar..
  • BBA Certification No. 10/4786.
  • Board coverage : 0.54m2
  • Pack coverage: 2.16m2
  • R-Value:  5.71m2K/W
  • Thermal Conductivity: 0.021 W/mk
£ 178.55
Ex Tax:£ 148.79
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 32 - 125mm
125mm Knauf Earthwool DriTherm 32 Ultimate Cavity Slab is a non-combustible, water-repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.032W/mK for use in masonry full fill cavity wall applications. Dritherm 32 Knauf Cavity Slab 125mm is a highly durable, odourl..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 57.18
Ex Tax:£ 47.65
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 32 - 125mm
125mm Superglass Superwall 32 Cavity Wall Insulation Slab is a lightweight, non-combustible glass mineral wool insulation batt with a certified thermal conductivity of 0.032W/mK, used in masonry full or partial fill cavity wall applications. Superglass Superwall 32 Cavity Wall Insulation Batt 125..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 72.67
Ex Tax:£ 60.56
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 36 - 125mm
125mm Superglass Superwall 36 Cavity Wall Insulation Batt is a lightweight water repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.036W/mK, used in masonry full or partial fill cavity wall applications. Superglass Superwall 36 Cavity Wall Insulation Batts are..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 65.56
Ex Tax:£ 54.63
Estimated delivery: 3-5 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 125mm CavityTherm Unilin
125mm Unilin CT/PIR CavityTherm Board, a full fill cavity wall insulation made of an enhanced PIR core with thermal conductivity of 0.021W/mK, for full fill cavity wall applications. CavityTherm is proven to provide the most cost effective answer, not only reaching Future Homes Standard fabric U-..
  • 125mm CavityTherm Unilin Insulation for full fill cavity wall applications
  • CavityTherm is an innovative built-in insulation for traditional walls
  • CavityTherm achieves passive level U-Values as low as 0.12 W/m2K
  • Made of an enhanced PIR core with thermal conductivity of 0.021W/mK
  • CavityTherm Unilin is a continuous insulation system for full fill cavities
£ 126.10
Ex Tax:£ 105.08
Estimated delivery: 3-5 working days
Brand: URSA® Model: 125mm URSA TERRA 32
125mm URSA 32 Lightweight Cavity Wall Insulation Batt is a non-combustible semi rigid glass mineral wool slab treated with silicone water-repellent additive designed for use as either a full or partial fill masonry cavity wall insulation for buildings up to 25meters in height. URSA 32 Cavity Slab..
  • Non-combustible Class A1 Cavity Batt
  • Full or Partial Fill Masonry Cavity Walls
  • Semi rigid glass mineral wool cavity slab
  • Certified thermal conductivity of 0.032W/mK
  • BBA Certificate 09/4624 ǀ Density of 32 kg/m3
£ 62.88
Ex Tax:£ 52.40
Estimated delivery: 3-5 working days
Brand: Recticel® Model: 140mm Cavity
140mm Recticel Eurowall PLUS PIR Cavity Insulation Board is a high-performance polyisocyanurate rigid foam insulation board faced with a gas diffusion tight multilayer foil on both sides suitable for full fill cavity wall applications with a minimum residual cavity of 10mm, up to 25m in height. E..
  • Size: 1190mm x 450mm
  • Board coverage: 0.54m2
  • Thermal Conductivity: 0.022 W/mk
  • Tongue and Groove
  • BBA Certificate 02/3908
£ 29.88
Ex Tax:£ 24.90
Estimated delivery: 7-10 working days
Brand: Knauf® Model: DriTherm 34 - 150mm
150mm Knauf DriTherm 34 is a super non-combustible, water-repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.034W/mK for use in masonry full fill cavity wall applications. Knauf Cavity Slabs are highly durable, odourless, rot proof, non-hygroscopic, does not s..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 62.69
Ex Tax:£ 52.24
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 37 - 85mm
85mm Knauf DriTherm 37 Standard Cavity Insulation is a water-repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.037W/mK for use in external masonry full fill cavity walls. Knauf DriTherm 37 Cavity Wall Slab 85mm is a highly durable, odourless, rot proof, non-h..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 39.79
Ex Tax:£ 33.16
Estimated delivery: 3-5 working days
Brand: Kingspan® Model: 115mm K106
115mm Kingspan Kooltherm K106 Cavity (1200mm x 450mm) is an advanced full fill cavity wall insulation board with certified thermal conductivity of 0.019 W/mK that achieves the same wall U-value as alternative products with a much thinner profile. The NHBC accepts the use of Kingspan Kooltherm K10..
  • 115mm Kingspan Kooltherm K106 Cavity Board
  • Advanced full-fill cavity wall insulation board
  • Excellent thermal conductivity of 0.019 W/mK
  • Premium performance rigid thermoset fibre-free phenolic insulation
  • Water-tight polypropylene fleece and low emissivity composite foil
£ 155.88
Ex Tax:£ 129.90
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 37 - 100mm
100mm Knauf DriTherm 37 Standard Cavity Wall Slab is a glass mineral wool insulation slab with a certified thermal conductivity of 0.037W/mK, used in external masonry full-fill cavity walls. Dritherm 37 Cavity Slab 100mm is a water-reppelent, highly durable, odourless, rot proof, non-hygroscopic,..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 52.54
Ex Tax:£ 43.78
Estimated delivery: 3-5 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 125mm ECO/CT Internal Corner
125mm Internal Corner for Unilin CavityTherm ECO/CT System is used as a part of full fill cavity wall insulation system to improve the overall U-Value of the wall. Unilin ECO/CT offers Lambda value (thermal conductivity) of 0.020 W/mK for full fill cavity wall applications along with pioneering e..
  • 125mm Internal Corner for CavityTherm ECO/CT Unilin Full Fill Cavity
  • Unilin ECO/CT 360 (CavityTherm) achieves U-Values down to 0.12 W/m2K
  • Lambda value of 0.020 W/mK with pioneering environmentally sensitive features
  • Minimising the threat of Thermal Bridging and improving the U-Value of the wall
  • Meets both the Climate Challenge 2030 and Low Energy Transformation Initiative
£ 155.88
Ex Tax:£ 129.90
Estimated delivery: 5-7 working days
Brand: Unilin Insulation (UK) known as Xtratherm Model: 150mm CavityTherm Unilin
150mm CavityTherm Unilin CT/PIR is a continuous insulation system for full fill cavity wall applications made of an enhanced PIR rigid foam core with thermal conductivity of 0.021W/mK. CavityTherm is proven to provide the most cost effective answer, not only reaching Future Homes Standard fabric ..
  • 150mm CavityTherm Unilin Insulation for full fill cavity wall applications
  • CavityTherm is an innovative built-in insulation for traditional walls
  • CavityTherm achieves passive level U-Values as low as 0.12 W/m2K
  • Made of an enhanced PIR core with thermal conductivity of 0.021W/mK
  • CavityTherm Unilin is a continuous insulation system for full fill cavities
£ 135.67
Ex Tax:£ 113.06
Estimated delivery: 3-5 working days
Brand: Xtratherm® Model: 150mm CT/PIR
150mm Xtratherm CT/PIR CavityTherm Thin-R is a cost effective rigid PIR (polyisocyanurate) thermal insulation board used for traditional full fill cavity walls to provide excellent U-Values and meet the Passive House standards. Xtratherm CT/PIR Cavity Wall insulation is a top-class composite boar..
  • BBA Certification No. 10/4786.
  • Board coverage : 0.54m2
  • Pack coverage: 2.16m2
  • R-Value:  6.9m2K/W
  • Thermal Conductivity: 0.021 W/mk
£ 231.70
Ex Tax:£ 193.08
Estimated delivery: 5-7 working days
Brand: Knauf® Model: DriTherm 32 - 150mm
150mm Knauf Earthwool Ultimate DriTherm 32 Cavity Slab is a semi-rigid non-combustible, water-repellent glass mineral wool insulation slab with a certified thermal conductivity of 0.032W/mK for use in masonry full fill cavity wall applications. Dritherm 32 Cavity Insulation Slab 150mm is a highly..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 65.32
Ex Tax:£ 54.43
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 32 - 150mm
150mm Superglass Superwall 32 Cavity Wall Batt is an easy to handle and install glass mineral wool insulation slab with a certified thermal conductivity of 0.032W/mK, used in masonry full fill or partial fill cavity wall applications. Superglass Superwall 32 Cavity Wall Insulation Batt is a highl..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 85.12
Ex Tax:£ 70.93
Estimated delivery: 3-5 working days
Brand: Superglass® Model: Superwall 36 - 150mm
150mm Superwall 36 Superglass Cavity Wall Insulation Batt is a lightweight glass mineral wool cavity insulation slab with a certified thermal conductivity of 0.036W/mK, used in masonry full or partial fill cavity wall applications. Superglass Superwall 36 Cavity Wall Insulation Batts are highly d..
  • BBA Certified
  • Non-Combustible
  • Glass Mineral Wool Cavity Batts
  • Building Regulations: Class ‘O’ 
  • Fire performance: Euroclass A1
£ 72.42
Ex Tax:£ 60.35
Estimated delivery: 3-5 working days
Brand: URSA® Model: 150mm URSA TERRA 32
150mm URSA 32 Lightweight Cavity Insulation Batt is an A1 class, non-combustible semi rigid glass mineral wool cavity batt with silicone water repellent additive used in full fill or partial fill external masonry cavity walls for buildings up to 25m in height. URSA 32 Cavity Slab 150mm is manufac..
  • Non-combustible Class A1 Cavity Batt
  • Full or Partial Fill Masonry Cavity Walls
  • Semi rigid glass mineral wool cavity slab
  • Certified thermal conductivity of 0.032W/mK
  • BBA Certificate 09/4624 ǀ Density of 32 kg/m3
£ 79.68
Ex Tax:£ 66.40
Estimated delivery: 3-5 working days
Brand: Knauf®