Menu
Menu
Your Cart

45mm Xtratherm Thin-R XT/CW Partial Fill Cavity Insulation (pack of 9)

45mm Xtratherm Thin-R XT/CW Partial Fill Cavity Insulation (pack of 9)
Guide Price
45mm Xtratherm Thin-R XT/CW Partial Fill Cavity Insulation (pack of 9)
Guide Price: £71.83 (£86.20 inc VAT)
Price per m2: £14.78/m2 (£17.74 inc VAT)
5 or more £70.39 (£84.47 inc VAT)
10 or more £69.48 (£83.38 inc VAT)
20 or more £67.71 (£81.25 inc VAT)
  • Product Code: A1-239
  • Delivery Time: 2 - 4 days
  • Brand: Xtratherm
  • (Tech. support: 03712221055)
  • Model and Size: 1200x450mm - 4.86m2
  • Weight: 6.56kg
Our ratings on 09-10-2025:
Google My Business Reviews
4.8 out of 5
Show other thicknesses

45mm Xtatherm Thin-R XT/CW Partial Fill Cavity Insulation (pack of 9)

Thickness: 45mm
Width: 450mm
Length: 1200mm
Pack Coverage: 4.86m2
Density: 30kg/m3
Weight/m2: 1.35kg
Weight: 6.56kg
Thermal Conductivity: 0.022W/mK
R-Value: 2.05m2K/W
Compressive Strength: 120kPa
Water vapour resistivity: 100MN.s/g.m
Surface Spread of Flame: Class 1

Xtratherm ThinR XT/CW Partial Fill Cavity Wall Insulation is the best solution when designers or regulations demand additional thermal insulation in external masonry walls, without a substantial increase in the width of the cavity. Xtratherm Thin-R boards achieve high standards of insulation whilst maintaining a residual cavity to prevent moisture penetration, without a substantial increase in the width of the cavity and of the overall wall thickness.

APPLICATION
  • partial fill cavity wall insulation

CHARACTERISTICS

  • The board comprises a CFC/HCFC free rigid Polyisocyanurate (PIR) core between low emissivity foil facings.
  • Square Edge
  • Clear cavity maintained
  • No exposure restrictions
  • Extra thermal performance Refer to NBS clause F30 155, F30 12

The Low emissivity foil facing on Xtratherm boards improve the thermal performance of the wall. The residual cavity is the most effective method of preventing rain penetrating a wall from the outside. The wall insulation shall be installed in accordance with instructions issued by Xtratherm.

Tongue & Groove board profile is also available upon request.

CERTIFICATION
  • This product is manufactured to EN ISO 9001:2000
  • Product certification: BBA certification no. 07/4407
  • Standard: BS EN 13165
Brand: Xtratherm Model and Size: CT/PIR 1200x450 - 2.16m2
Delivery Time: 1-3 working days
75mm Xtratherm CavityTherm wall insulation board is a high performance composite board of enhanced PIR core with a lambda value of 0.021W/mK. The boards have gas tight facings with one face bonded to a profiled HIPS skin during manufacture to provide a drainage plane. CavityTherms unique engineered ..
Get Best Price
50mm Xtratherm Safe-R SR/PR Phenolic Insulation Board (pack of 6)
Guide Price
Brand: Xtratherm Model and Size: 2400x1200mm 17.28m2
Delivery Time: 2 - 3 working days
50mm Xtratherm Safe-R SR/PR Phenolic Foam offers superior insulation performance and enhanced fire safety. It features a Class O phenolic foam core with minimal smoke obscuration and is equipped with low emissivity aluminium facings on both sides. The thermal conductivity can be as low as 0.021W/mK...
Guide Price: £353.69
£424.43 inc VAT
Get Best Price
35mm Xtratherm PIR Rigid Insulation Board
Guide Price
Brand: Xtratherm Model and Size: Thin-R - 2400 x 1200 - 2.88m2
Delivery Time: 1-3 working days
35mm Xtratherm Thin-r is a foil faced Polyisocyanurate (PIR) insulation board formed by a blowing process which generates rigid foam composed of fine cells filled with Pentane blowing agent trapped within the foam. Pentane has very good insulating properties and gives Thin-r superb insulating capabi..
Guide Price: £34.64
£41.57 inc VAT
Get Best Price
34.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF - Mech Fix (25mm PIR Insulation bonded to 9.5mm Plasterboard)
Guide Price
Brand: Xtratherm Model and Size: 1200x2400 - 2.88m2
Delivery Time: 1-3 working days
34.5mm Xtratherm Thin-R Thermal Liner XT/TL-MF, this innovative composite insulated panel combines a 25mm Xtratherm Polyiso (PIR) core with foil faces, bonded to 9.5mm tapered edge plasterboard for secure mechanical fixing to internal walls. Ideal for use in new build and refurbishment projects, XT/..
Guide Price: £35.95
£43.14 inc VAT
Get Best Price
110mm Xtratherm Flat Roof Board FR-MG (pack of 4)
Guide Price
Brand: Xtratherm Model and Size: 1200mm x 1200mm - 5.76m2
Delivery Time: 3 - 5 days
Xtratherm FR-MG 110mm is a mineral coated glass faced board. Xtratherm XT/FR MG boards should be laid over the vapour control layer in a break bonded pattern. The long edges of the boards should be laid at right angles to the direction of the substrate and all edges must be fully supported by the de..
Guide Price: £134.70
£161.64 inc VAT
Get Best Price
60mm Flat Roof PIR Insulation Board Xtratherm FR-BGM (pack of 8)
Guide Price
Brand: Xtratherm Model and Size: 1200mm x 1200mm - 11.52m2
Delivery Time: 3 - 5 days
60mm Xtratherm FR-BGM is a PIR insulation board that is faced with a fleece finished bitumen/glass facers and is suitable for use below partially bonded bitumen based built up roofing systems. FR-BGM is suitable to apply torch on felt directly on the insulation. FR-BGM can also be used in mecha..
Guide Price: £191.31
£229.57 inc VAT
Get Best Price
This product is listed in the following categories and systems (click to show).