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Celotex FR4000 PIR Insulation Premium Board Fire Resistant

Celotex FR4000 premium performance PIR solution. Through ongoing product innovation and breakthrough design, FR5000 represents pioneering progression within the PIR industry. More information
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Price from
£234.00 (inc. VAT) £195.00 (ex. VAT)

Availability: In stock

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Price from
£234.00 (inc. VAT) £195.00 (ex. VAT)

Celotex FR4000 PIR Insulation Premium Board Fire Resistant

Celotex FR4000 PIR Insulation Premium Board Fire Resistant

Can be used for

  • Pitched Roofs
  • Walls
  • Floors


Celotex FR4000 premium performance PIR solution. Through ongoing product innovation and breakthrough design, FR4000 represents pioneering progression within the PIR industry.

With low emissivity textured aluminium foil facings, FR4000 is manufactured from rigid polyisocyanurate (PIR) using a blowing agent that has low global warming potential (GWP) and zero ozone depletion potential (ODP).

Board size: 1200mm x 2400mm
Lambda: 0.021W/mK

FR4000 has the following attributes

  • Has a lower thermal conductivity value (0.021W/mK) compared with other typical PIR insulation boards providing enhanced thermal performance and better U-values
  • Achieves an 'A+' rating when compared to the BRE Green Guide 2008
  • Has Class O fire performance throughout the entire product in accordance with BS 476
  • Includes low emissivity textured aluminium foil facings giving improved thermal performance within cavity air-spaces
  • Is suitable for a range of applications
  • Future proofs the energy performance of new and existing buildings
  • 5-7 day lead time

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Products No Longer Required

If you cancel your order at any time after the date of our acceptance of your order and within 7 working days (i.e. excluding public holidays and weekends) following the date of delivery, we will give you a full refund including delivery charges.
If you advise us of your return more than 7 working days following the date of delivery we will advise you whether the return is acceptable and any costs associated. Any request has to be made via email. Phone returns are not acceptable.

Returns via courier

To arrange for the product to be collected e-mail support@bso.co.uk with your order number and details of the product to be returned. We will arrange for the collection of the product by our nominated carrier. Please note that there will be a minimum charge payable by you of £25 for this service, which may rise depending on your location and product type. Your refund will be processed within 30 days. 

Returns via pallet or artic

To arrange for the product to be collected e-mail support@bso.co.uk with your order number and details of the product to be returned. We will arrange for the collection of the product by our nominated carrier. Please note that there will be a minimum charge payable by you of £75 per pallet or consignement for this service, which may rise depending on your location and product type. Your refund will be processed within 30 days. 

Faulty or Damaged Products

In the unlikely event that a delivered product (including special order items) is faulty or damaged, we will exchange it or provide you with a full refund, as long as we are notified of the product's fault within 24 hours of it being delivered to you.
To arrange for the product to be collected, e-mail support@bso.co.uk  with your order number and details of the product to be returned. We will collect it at no expense to yourself, and either provide a replacement or process a refund if the product is no longer in stock. After 24 hours please refer to manufacturer returns policy.

Alternatively, you can make arrangements for collection of the product through our nominated carrier. The cost of the return will be at our expense. We require the return of the product within 7 days of the refund request being made.

All refunds will be made to the account used to purchase the product.

We reserve the right to inspect all returned products prior to agreeing to any part-refund, full refund or product exchange.

The cost of delivery depends on the type of product you order. Minimun spends are excluding any delivery charges.

'Parcel Service'

Up To £75

Next Day Delivery: £7.50 (Order before 1:00pm)

Economy: £3.50              (2-3 Working Days)

Saturday: £12.99

Northern Ireland: £20

£75 and over

 Next Day Delivery: FREE (Order before 1:00pm)

 Economy: FREE              (2-3 Working Days)

 Saturday: £7.99

 Northern Ireland: £15

'BIG & HEAVY'

 Up To £350

 Next Day Delivery: £35 (Order before 12:00pm)

 Economy: £20                (select a date from the dropdown in basket)

 £350 and over

 Next Day Delivery: FREE      (Order before 12:00pm)

 Economy: FREE                  (select a date from the dropdown in basket)

PAVING - Saturday & AM delivery options available