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140mm Celotex Thermaclass Cavity Wall 21 Full Fill Insulation Board T&G 1190mm x 450mm (2.14m2/Pack)

URN: 3002377

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Based on your total area of m2 (inc. 10% wastage) - of these are required (actual coverage of m2)

We recommend purchasing at least 10% extra product to allow for errors, damages or obstacles

140mm Thermaclass Cavity Wall 21 is designed for use in full fill cavity wall applications, boasting an impressively low thermal conductivity of just 0.021 W/m.K.

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Product Overview

140mm Thermaclass Cavity Wall 21 is designed for use in full fill cavity wall applications, boasting an impressively low thermal conductivity of just 0.021 W/m.K.

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Delivery & Returns Information

All delivery charges are shown in your basket and are dependent on the total value of items in your basket based on product category.

Standard (Nationwide) Delivery

Insulation, Plasterboard and Drylining Products
ORDER VALUE DELIVERY CHARGE
Under £150 ex. VAT £50 ex. VAT
Between £150 - £400 ex. VAT £35 ex. VAT
Over £400 ex. VAT FREE
Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
ORDER VALUE DELIVERY CHARGE
Under £100 ex. VAT £35 ex. VAT
Between £100 - £300 ex. VAT £20 ex. VAT
Over £300 ex. VAT FREE
SuperFOIL and YBS products
ORDER VALUE DELIVERY CHARGE
Each item £10 ex. VAT
Over £350 ex. VAT of 1 brand FREE
Screws & Fixings and Adhesives & Sealants
ORDER VALUE DELIVERY CHARGE
Under £100 ex. VAT £7.50 ex. VAT
Over £100 ex. VAT FREE
Thermafleece CosyWool Roll & SupaSoft Insulation
QUANTITY DELIVERY CHARGE
1 £30 ex. VAT
2 £60 ex. VAT
3 to 12 £70 ex. VAT
13 to 24 £140 ex. VAT
25 to 36 £210 ex. VAT
37 to 48 £280 ex. VAT
49 to 60 £350 ex. VAT
61+ £420 ex. VAT
Thermafleece CosyWool Slab, Thermafleece UltraWool & Thermafleece NatraHemp
QUANTITY DELIVERY CHARGE
1 £30 ex. VAT
2 £60 ex. VAT
3 to 4 £70 ex. VAT
5 to 8 £140 ex. VAT
9 to 12 £210 ex. VAT
13 to 16 £280 ex. VAT
17 to 20 £350 ex. VAT
21+ £420 ex. VAT
Block Pavers
ORDER VALUE DELIVERY CHARGE
Under £100 ex. VAT £17.50 ex. VAT
Between £100 - £200 ex. VAT £30.50 ex. VAT
Between £200 - £900 ex. VAT £105 ex. VAT
Over £900 ex. VAT FREE
Artificial Grass
ORDER VALUE DELIVERY CHARGE
Under £100 ex. VAT £12 ex. VAT
Between £100 - £200 ex. VAT £16.50 ex. VAT
Over £200 ex. VAT £22 ex. VAT
Doors and Feature Panelling
QUANTITY DELIVERY CHARGE
1 to 2 £40 ex. VAT
3 to 4 £50 ex. VAT
5+ £65 ex. VAT

* Deliveries of Doors and Panels to Scotland may incur additional costs and may have an extended delivery time of an additional 3 working days. Delivery to the postcodes below will be charged an additional delivery fee. Our customer service team will reach out to you if you order requires an additional delivery charge. This will be calculated based on the difference between the standard cost charged and the total cost outlined below:

Postcodes: KA1-29, IV1-39, AB, PH1-41, DD, PA1-19, KY, FK, FK15-21 - £100 ex VAT (total delivery cost)
Postcodes: KW 1-14 - £130 ex VAT (total delivery cost)
Highlands and Island: £305 ex VAT (total delivery cost)

Ironmongery
QUANTITY DELIVERY CHARGE
1+ £16.50 ex. VAT

Express Delivery

Express Delivery - Insulation and Plasterboard & Drylining
ORDER VALUE DELIVERY CHARGE
Under £400 ex. VAT £50 ex. VAT
Over £400 ex. VAT £35 ex. VAT
Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
ORDER VALUE DELIVERY CHARGE
Under £300 ex. VAT £50 ex. VAT
Over £300 ex. VAT £35 ex. VAT

This charge is based on delivery to mainland UK excluding the Scottish Highlands. If your delivery address is in the Scottish Highlands a member of our customer service team will contact you prior to processing your order should an additional delivery charge apply. We do not offer deliveries outside the UK mainland.

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Returns

We offer a 30 day returns policy on any faulty products.

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Key Features

  • Polyisocyanurate (PIR) insulation board
  • Low thermal conductivity of 0.021 W/m.K
  • Designed for full fill cavity wall applications
  • Low emissivity foil facing for improved thermal performance
  • Allows installation with up to 10mm residual cavity
  • Facilitates ease of installation and accommodates mortar squeeze

Technical Specification

Technical Specification
Material Type:PIR
Thickness:140mm
Width:450mm
Length:1190mm
Pieces Per Pack:4
Sales Unit:Pack
Sales Unit Coverage:2.14m2
Brand:Celotex
Thermal Conductivity:0.021W/mK

What is 140mm Thermaclass Cavity Wall 21? 

Discover the versatility and efficiency of 140mm Thermaclass Cavity Wall 21, a specialised polyisocyanurate (PIR) insulation board tailored for full fill cavity wall applications. 

This innovative insulation board comes equipped with a low emissivity foil facing, offering the flexibility to install it with up to a 10mm residual cavity, ensuring a smooth installation process and accommodating mortar squeeze.

Alternatively, it can be used as a full fill solution with no residual cavity.

140mm Thermaclass Cavity Wall 21 Applications

  • Full fill cavity wall insulation: Ideal for insulating full fill cavity walls, providing excellent thermal performance and energy efficiency.
  • Target U-value reduction: Low thermal conductivity of 0.021 W/m.K reduces the thickness of insulation required to achieve the desired U-value in buildings.
  • Improved U-value in sealed cavity air spaces: The high-performance facer enhances thermal performance in sealed cavity air spaces, improving achievable U-values (based on a residual cavity of 10mm).


140mm Thermaclass Cavity Wall 21 Benefits

  • Excellent thermal performance: With a thermal conductivity of 0.021 W/m.K, Thermaclass Cavity Wall 21 reduces the amount of insulation needed to meet target U-values, enhancing energy efficiency.
  • High-performance facer: The low emissivity foil facing improves thermal performance in sealed cavity air spaces, contributing to better achievable U-values.
  • Easy installation: Sized to fit standard cavity wall tie spacing, the boards are light and rigid, making transportation, handling, and fitting effortless.
  • BBA certified: Thermaclass Cavity Wall 21 has been assessed and certified by the BBA (British Board of Agrément) for use in defined full fill cavity wall applications, ensuring its suitability when installed, used, and maintained according to the certification guidelines.


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