Celotex Thermaclass Cavity Wall 21 full fill cavity wall board Celotex Insulation

Celotex Thermaclass Cavity Wall 21

Lower lambda value, higher performance, rigid Polyisocyanurate (PIR) full fill cavity wall insulation board.

Comes in tongue & grooved conveniently sized boards for installation between cavity wall ties.

Includes low emissivity foil facings giving improved thermal insulation performance within a 10mm residual cavity air space.

Can be installed with up to a 10mm residual cavity or as a full fill solution with no residual cavity.

Can be used to provide energy performance of new and existing buildings.

BBA certified.

Provides reliable long term energy savings for buildings.

Thicknesses and Availability:

Available in most popular thicknesses from the manufacturer; short lead-times apply as we may need to get the products in from Celotex before delivering to site.

This Thermaclass Cavity Wall 21 Range includes the following available product thicknesses: 90mm, 115mm and 140mm.


Product Information

General information about Celotex Thermaclass Cavity Wall 21

Product Application

Full fill cavity wall application insulating board

Celotex's high performance polyisocyanurate (PIR) foam board, Thermaclass Cavity Wall 21, is suitable for use in cavity wall applications with up to a 10mm residual cavity or full fill cavity with no residual cavity.

Product Make-up

Core

Celotex Thermaclass Cavity Wall 21 is manufactured from rigid polyisocyanurate (PIR) using a blowing agent that has zero ozone depletion potential (zero ODP) and low global warming potential (GWP).

Facings

Faced on both sides with a low emissivity aluminium foil, autohesively bonded to the insulation core during manufacture.

Product Properties

Thickness 90mm to 140mm
Board Length 1.2m
Board Width 0.45m
Board Edge Tongue & Grooved

Product Prices

Buy Celotex Thermaclass Cavity Wall 21

The prices and quantity discounts below are 'per pallet' rates. Pallets contain multiple boards... 96 x 0.45x1.2m = 51.41m² - in this instance, there are 96 x boards on a pallet where each board is 0.45m x 1.2m providing a total coverage of 51.41m² per pallet

1 x pallet @ £25.22 per m² / £13.62 per board = £1307.49 (£1568.99 inc-VAT) per pallet
2 x pallets @ £25.00 per m² / £13.50 per board = £1295.92 (£1555.10 inc-VAT) per pallet
3 x pallets @ £24.78 per m² / £13.38 per board = £1284.35 (£1541.22 inc-VAT) per pallet
4 x pallets @ £24.55 per m² / £13.26 per board = £1272.78 (£1527.34 inc-VAT) per pallet
5 x pallets @ £24.33 per m² / £13.14 per board = £1261.21 (£1513.45 inc-VAT) per pallet
6 x pallets @ £24.11 per m² / £13.02 per board = £1249.64 (£1499.57 inc-VAT) per pallet

1 x pallet @ £32.23 per m² / £17.40 per board = £1392.24 (£1670.69 inc-VAT) per pallet
2 x pallets @ £31.94 per m² / £17.25 per board = £1379.92 (£1655.90 inc-VAT) per pallet
3 x pallets @ £31.66 per m² / £17.10 per board = £1367.60 (£1641.12 inc-VAT) per pallet
4 x pallets @ £31.37 per m² / £16.94 per board = £1355.28 (£1626.34 inc-VAT) per pallet
5 x pallets @ £31.09 per m² / £16.79 per board = £1342.96 (£1611.55 inc-VAT) per pallet
6 x pallets @ £30.80 per m² / £16.63 per board = £1330.64 (£1596.77 inc-VAT) per pallet

1 x pallet @ £39.23 per m² / £21.19 per board = £1355.93 (£1627.12 inc-VAT) per pallet
2 x pallets @ £38.89 per m² / £21.00 per board = £1343.93 (£1612.72 inc-VAT) per pallet
3 x pallets @ £38.54 per m² / £20.81 per board = £1331.93 (£1598.32 inc-VAT) per pallet
4 x pallets @ £38.19 per m² / £20.62 per board = £1319.93 (£1583.92 inc-VAT) per pallet
5 x pallets @ £37.85 per m² / £20.44 per board = £1307.93 (£1569.52 inc-VAT) per pallet
6 x pallets @ £37.50 per m² / £20.25 per board = £1295.93 (£1555.12 inc-VAT) per pallet

1 plus rolls @ £0.14 per lm = £6.78 (£8.14 inc-VAT) per roll
5 plus rolls @ £0.13 per lm = £6.72 (£8.06 inc-VAT) per roll
10 plus rolls @ £0.13 per lm = £6.66 (£7.99 inc-VAT) per roll
15 plus rolls @ £0.13 per lm = £6.60 (£7.92 inc-VAT) per roll
20 plus rolls @ £0.13 per lm = £6.54 (£7.85 inc-VAT) per roll
25 plus rolls @ £0.13 per lm = £6.48 (£7.78 inc-VAT) per roll

Reasonable stock levels are generally held at most of our depots. In some geographic locations, depots may stock alternates, however, we will contact you to discuss before proceeding with the order.

Where products need to be brought in from Celotex, please allow approx. 1 week for delivery.

  • Generally 1 or 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Thermal Conductivity 0.021 W/mK
Compressive Strength 120 kPa at 10% compression BS EN 826:2013
Vapour Resistance > 300 MNs/gm
Product Thickness Thermal Resistance kg/m²
Celotex Cavity Wall 21 90mm 90mm 4.25 m²K/W 2.80 kg/m²
Celotex Cavity Wall 21 115mm 115mm 5.45 m²K/W 3.55 kg/m²
Celotex Cavity Wall 21 140mm 140mm 6.65 m²K/W 4.30 kg/m²

Product Certificates

Please visit the Celotex website for product certificates.