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 Kingspan before delivering to site.

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

Due to supply challenges from the manufacturers, please allow extended lead times on all PIR boards. Please feel free to contact me to check availability and lead times.

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

Thermal Conductivity 0.021 W/m·K
Compressive Strength 120 kPa at 10% compression BS EN 826:2013
Board Length 1.2m
Board Width 0.45m
Board Edge Tongue & Grooved
Vapour Resistance > 300 MNs/gm

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 in a pack where each board is 0.45m x 1.2m providing a total coverage of 51.41m² per pack.

Rarely requested product sourced directly from manufacturer. Celotex Thermaclass Cavity Wall 21 90mm, 96 x 0.45x1.19m = 51.41m² - ranging from £25.14 to £26.31 per m²

1 x pallet @ £26.31 per m² / £14.09 per board = £1352.42 (£1622.90 inc-VAT) per pallet
2 x pallets @ £26.07 per m² / £13.96 per board = £1340.45 (£1608.54 inc-VAT) per pallet
3 x pallets @ £25.84 per m² / £13.84 per board = £1328.49 (£1594.19 inc-VAT) per pallet
4 x pallets @ £25.61 per m² / £13.71 per board = £1316.52 (£1579.82 inc-VAT) per pallet
5 x pallets @ £25.38 per m² / £13.59 per board = £1304.55 (£1565.46 inc-VAT) per pallet
6 x pallets @ £25.14 per m² / £13.46 per board = £1292.58 (£1551.10 inc-VAT) per pallet

Rarely requested product sourced directly from manufacturer. Celotex Thermaclass Cavity Wall 21 115mm, 80 x 0.45x1.19m = 42.84m² - ranging from £32.12 to £33.61 per m²

1 x pallet @ £33.61 per m² / £18.00 per board = £1439.70 (£1727.64 inc-VAT) per pallet
2 x pallets @ £33.31 per m² / £17.84 per board = £1426.96 (£1712.35 inc-VAT) per pallet
3 x pallets @ £33.01 per m² / £17.68 per board = £1414.22 (£1697.06 inc-VAT) per pallet
4 x pallets @ £32.71 per m² / £17.52 per board = £1401.48 (£1681.78 inc-VAT) per pallet
5 x pallets @ £32.42 per m² / £17.36 per board = £1388.74 (£1666.49 inc-VAT) per pallet
6 x pallets @ £32.12 per m² / £17.20 per board = £1376.00 (£1651.20 inc-VAT) per pallet

Rarely requested product sourced directly, possibly manufactured to order. Celotex Thermaclass Cavity Wall 21 140mm, 64 x 0.45x1.19m = 34.27m² - ranging from £39.11 to £40.92 per m²

1 x pallet @ £40.92 per m² / £21.91 per board = £1402.24 (£1682.69 inc-VAT) per pallet
2 x pallets @ £40.56 per m² / £21.72 per board = £1389.84 (£1667.81 inc-VAT) per pallet
3 x pallets @ £40.19 per m² / £21.52 per board = £1377.43 (£1652.92 inc-VAT) per pallet
4 x pallets @ £39.83 per m² / £21.33 per board = £1365.02 (£1638.02 inc-VAT) per pallet
5 x pallets @ £39.47 per m² / £21.13 per board = £1352.61 (£1623.13 inc-VAT) per pallet
6 x pallets @ £39.11 per m² / £20.94 per board = £1340.20 (£1608.24 inc-VAT) per pallet

Less popular product commonly available at selected depots. Bostik Idenden T303 tape, 100mm x 50m = 50lm - ranging from £0.12 to £0.12 per lm

1 plus rolls @ £0.12 per lm = £6.22 (£7.46 inc-VAT) per roll
5 plus rolls @ £0.12 per lm = £6.16 (£7.39 inc-VAT) per roll
10 plus rolls @ £0.12 per lm = £6.11 (£7.33 inc-VAT) per roll
15 plus rolls @ £0.12 per lm = £6.05 (£7.26 inc-VAT) per roll
20 plus rolls @ £0.12 per lm = £6.00 (£7.20 inc-VAT) per roll
25 plus rolls @ £0.12 per lm = £5.94 (£7.13 inc-VAT) per roll

Products need to be brought in from Celotex, please allow approx. 1-2 weeks for delivery on stocked items (highlighted in green below in the properties section).

Celotex reserves the right to change stocked products - while we will do all we can to keep on top of changes, availability and lead times my vary.

Please observe the 'Star Rating' indicators to assess availability.
Product Availability Excellent Generally 1 or 2 days for delivery
Product Availability Good Generally 1 to 5 days for delivery
Product Availability Fair Generally 5 to 10 days for delivery
Product Availability Poor Generally 5 to 15 days for delivery
Product Availability Undetermined 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 Certification, Downloads, and Installation Guides

Thermal Resistance

While we have provided Thermal Resistance values for all thicknesses on the Celotex Thermaclass Cavity Wall 21 datasheet, some thicknesses may not be readily available.

Items highlighted in green are generally held in stock by Celotex.

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
Minimum order level - £175.00 ex-VAT. For further details on Delivery Charges and Minimum Order levels, please Click Here