SKU: CW4100

100mm Celotex CW4100 Cavity Insulation 1200mm x 450mm - 6 Boards


£57.08 Ex VAT
£68.50 Inc VAT

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Thickness: 50mm

Size: 1200mm x 450mm

Coverage: 3.24m²

Material: PIR


Description

This Celotex CW4100 is a partial fill insulation for masonry cavity walls. It is a high-performance rigid polyisocyanurate (PIR) material which is available in 100mm thickness and has been pre-sized so it can fit between cavity wall ties. It's a versatile option suitable for use in both new and existing builds as well as extensions.

CW4100 insulation has excellent thermal conductivity value of 0.022 W/mK, and the innovative low emissive aluminium foil facing helps it to achieve impressive uValues. As a result, it's among the best-performing insulation materials available on the market, bringing you reliable long-term savings.

  • Quick & easy to install
  • High-performance partial fill PIR insulation board
  • Low emissivity foil facings
  • Improves thermal insulation performance in cavity air spaces
  • Suitable for masonry cavity walls
  • CS(10\Y)120 compressive strength (kPa)

Celotex CW4100 insulation board has been specifically sized to fit the standard wall tie spacing requirements. This means that no cutting is required, making it quick and easy to be installed. When fitted correctly, it will help you meet carbon dioxide emissions and energy use targets which have been set by the national building regulations.

Thickness: 100 mm
Length: 1200 mm
Width: 450 mm
No. Boards: 6
Coverage: 3.24 m²
R-value: 4.5 m²K/W
Thermal Conductivity: 0.022 W/mK
Maximum Weight: 3.65 kg/m² 
Certification: BA 16/5352 BBA  17/5405
Country Origin: UK


The R-value denotes the resistance to heat flow – the higher the R-value the more insulating the product is.

This sturdy PIR insulation comes with a BBA (British Board of Agrément) certificate and a BRE (Building Research Establishment) Green Guide Rating of A, which will help improve your environmental performance.

  • Thermal conductivity: 0.022 W/mK, according to BS EN 13165 for factory made rigid polyurethane foam (PU) product.
  • BRE Green Guide Rating: A.
  • Spread of flame: Euroclass F Reaction to Fire classification, according to BS EN 13501-1. Products with this level of classification are not provided with a rating for smoke emission.
  • Certification: BBA certified.
Everything good
Everything good. Best price I could find and everything arrived on time.
Campbell, GB
Excellent
Based on 50 reviews
Everything good
Everything good. Best price I could find and everything arrived on time.
Campbell, GB
Excellent service
Excellent service, best prices by far. Would definitely use again.
Billy, GB
Amazing customer service Arrived within…
Amazing customer service Arrived within the timeframe given and friendly staff when dropped off
Bethany King, GB
Great all round
Great communication, products, excellent delivery
Bernhard PALMER, GB
Great supplier! Happy customer!
Absolutely amazing. I needed a few timbers cut to different sizes, and these guys sorted it all out for me. Very friendly, very helpful. Will definitely buy from again.
Ben Williams, GB
Professional, quality service
Great prices. I received a follow up phone call to clarify certain items. Delivery was on the day agreed and despite access difficulties, it all went very smoothly.
Ben McG, GB
Great service
Great service, easy to use and fast and friendly delivery.
Ben Coulson, GB
Great experience with DIY Building…
Great experience with DIY Building Supplies - website nice and easy to use, really good prices and the delivery was quick and accurate using a local supplier. Would definitely use again.
Ben, GB
Great service and product
Great customer service throughout ordering and delivery. Product was perfect. Would definitely use again and highly recommend.
Becky, GB
Quick delivery and very helpfull drivers.
Quick delivery and very helpfull drivers for these heavy sheets. Great service. Thank you.
Barry Hensall, GB