Menu
Menu
Your Cart

90mm Celotex Thermaclass Cavity Wall 21 - Rigid PIR Full Fill Cavity Insulation Board (pack of 6)

90mm Celotex Thermaclass Cavity Wall 21 - Rigid PIR Full Fill Cavity Insulation Board (pack of 6)
90mm Celotex Thermaclass Cavity Wall 21 - Rigid PIR Full Fill Cavity Insulation Board (pack of 6)
Price: £99.30 (£119.16 inc VAT)
Price per m2: £30.65/m2 (£36.78 inc VAT)
  • Product Code: A1-4775
  • Delivery Time: 2 - 4 days
  • Brand: Celotex
  • (Tech. support: 01473820850)
  • Model and Size: 1190x450mm - 3.24m2
  • Weight: 9.07kg
Our ratings on 02-05-2025:
TrustPilot Review 4.7
4.7 out of 5 - Excellent
Google My Business Reviews
4.8 out of 5
Show other thicknesses

90mm Celotex Thermaclass Cavity Wall 21 - Rigid PIR Full Fill Cavity Insulation Board (pack of 6)

Width: 450mm
Length: 1190mm
Pack Quantity: 6
Weight/m2: 2.8kg
Weight: 9.07kg
Thermal Conductivity: 0.021W/mK
R-Value: 4.25m2K/W
Fire Rating (Reaction to Fire): E

90mm Celotex Thermaclass Cavity Wall 21 is a high performance rigid PIR full fill cavity insulation board with low emissivity foil facings offering enhanced thermal performance (0.021 W/m.K) within cavity air spaces. It can be installed with up to a 10mm residual cavity or as a full fill solution with no residual cavity. Celotex Thermaclass Cavity Wall 21 is manufactured from rigid polyisocyanurate (PIR) using a blend of blowing agents that have zero ozone depletion potential (zero ODP) and low global warming potential (GWP).

APPLICATION

  • Full fill cavity insulation,
  • Can be installed with up to a 10mm residual cavity

CHARACTERISTICS
  • Excellent thermal performance, 
  • Lightweight and easy to install,
  • Tongue and groove for easy installation,
  • The boards are sized to fit standard cavity wall tie spacing,
  • Can be used up to 18 metres height (England and Wales),
  • Includes low emissivity foil facings giving improved thermal insulation performance within cavity air spaces,
  • Has excellent dimensional stability,
  • Provides reliable long term energy savings for buildings.
CERTIFICATION
  • BBA certified, 
  • Euroclass E Reaction to Fire classification, according to BS EN 13501-1,
  • Manufactured under Environmental Management System ISO 14001:2015,
100mm Unilin Thin-R CT/PIR CavityTherm Full Fill Insulation (pack of 4) 100mm Unilin Thin-R CT/PIR CavityTherm Full Fill Insulation (pack of 4)
Guide Price
Brand: Unilin (prev. Xtratherm) Model and Size: 1200mm x 450mm - 2.16m2
Delivery Time: 1-3 working days
100mm Unilin 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. Unilin CavityTherm's unique ..
Guide Price: £107.54
£129.05 inc VAT
Get Best Price
Brand: Iko Model and Size: 1200mm x 2400mm - 11.52m2
Delivery Time: 2 - 3 working days
90mm IKO Enertherm ALU PIR Rigid Insulation Board is a versatile insulation board with a rigid polyisocyanurate (PIR) foam core, clad on both sides with reflective aluminium. The seven-layer gas-tight aluminium lamination enhances resistance to fire and water ingress. It’s made without CFC, HCFC, o..
Get Best Price
Brand: Celotex Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 2 - 3 working days
62.5mm Celotex PL4050 is a high-performance thermal insulation board with 50mm PIR insulation bonded to 12.5mm tapered edge plasterboard. It is made from rigid polyisocyanurate (PIR) using blowing agents that have zero ozone depletion potential (zero ODP) and low global warming potential (GWP). N..
£66.08
£79.30 inc VAT
Add to Cart
115mm Celotex Thermaclass Cavity Wall 21 - Rigid PIR Full Fill Cavity Insulation Board (pack of 5)
Guide Price
Brand: Celotex Model and Size: 1190x450mm - 2.7m2
Delivery Time: up to 7 days
115mm Celotex Thermaclass Cavity Wall 21 is a high performance rigid PIR full fill cavity insulation board with low emissivity foil facings offering enhanced thermal performance (0.021 W/m.K) within cavity air spaces. It can be installed with up to a 10mm residual cavity or as a full fill solu..
Guide Price: £106.25
£127.50 inc VAT
Get Best Price
Brand: Celotex Model and Size: 1200 x 600 - 3.6m2
Delivery Time: 3 - 5 days
100mm Celotex TC3000 Flat Roof Board - Torch on (pack of 5)Size: 1200mm x 600mmArea per pack: 3.6m2Thermal conductivity: 0.026 W/MkR-Value: 3.80m2K/WCompressive strength: 150kPaWeight: 4.00kg/m2 Celotex TC3000 provides a quick and easy method of achieving effective thermal insula..
Get Best Price
Brand: Celotex Model and Size: TD4000- 2400 x 1200
Delivery Time: 1 - 5 working days
Celotex TD4000 comprises a polyisocyanurate rigid foam insulation core, with a thermal conductivity of 0.022 W/mK, and low emissivity aluminium foil facings on both sides bonded to a layer of 5.5mm WBP exterior grade plywood.APPLICATIONCelotex TD4000 is purpose designed for use in light traffic..
Get Best Price
Brand: Celotex Model and Size: 1200x2400mm - 2.88m2
Delivery Time: 1 - 5 working days
57.5mm Celotex PL4045 is a high-performance thermal insulation board with PIR insulation bonded to 12.5mm tapered edge plasterboard. It is made from rigid polyisocyanurate (PIR) using blowing agents that have zero ozone depletion potential (zero ODP) and low global warming potential (GWP). Note: ..
Get Best Price
120mm Celotex Crown-Fix Flat Roof Board (pack of 10) - pallet of 2 packs
Guide Price
Brand: Celotex Model and Size: 2400x1200mm - 57.60m2
Delivery Time: Out Of Stock
120mm Celotex Crown-Fix is a brand new product for use in flat roof systems. Representing the next phase of Celotex innovation, Crown-Fix is a high performance rigid polyisocyanurate (PIR) insulation which delivers excellent dimensional stability and added robustness in a mechanically fixed sin..
Guide Price: £2,595.58
£3,114.70 inc VAT
Get Best Price
This product is listed in the following categories and systems (click to show).