Celotex GA4070 Insulation Board 70mm x 1200mm x 2400mm

£28.49 £23.74
In stock
Product Description

Celotex GA4070 Insulation Board 70mm is a high-quality polyisocyanurate (PIR) insulation board that can be used in multiple applications. It is comprised of a low emissivity foil facing to enhance the U-value of the structure, guaranteeing long-term energy savings.

Size: 70mm x 1200mm x 2400mm

Other available thicknesses: 25mm, 30mm, 40mm, 50mm, 60mm, 75mm, 80mm, 90mm, 100mm, 120mm & 150mm



We are happy to help with enquiries, stock availability or any technical help you require, however for security reasons we cannot take orders over the phone. So if you need to chat give us a call on 03301231761 or email us at [email protected].

What is Celotex GA4070 Insulation Board 70mm? 
Celotex GA4070 70mm is an excellent way to cut down on your energy bills while increasing sustainability. It is a cost-effective solution with excellent water vapour resistance and compressive strength of 140kPa.

It is simple and easy to install, making the entire process time efficient. It is produced using a gas which has zero ozone depletion potential (ODP) and low global warming potential (GWP).

What is the R-value of 70mm Celotex?
These high-performing boards improve the thermal environment of your building, offering a thermal conductivity of 0.022 W/mK and an R-value of 3.15 m2K/W.

Features and benefits of Celotex GA4070 Insulation Board 70mm: 

  • Excellent thermal performance with a thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit the target U-value.
  • Low emissivity foil facing provides improved thermal performance in sealed cavity air spaces, improving the achievable U-value.
  • Easy to install – Celotex boards are light and rigid assisting with ease of transportation, handling, and fitting.
  • BBA certified – Celotex GA4000 has been assessed by the BBA as fit for use in defined roof, wall, and floor applications if installed, used, and maintained as set out in the certificate.
  • Celotex GA4000 achieves a BRE Green Guide Rating of A which can assist in demonstrating environmental performance in BREEAM assessments.
  • Lightweight 2400 x 1200mm boards
  • Low emissivity foil facing

Applications for Celotex GA4070 Insulation Board 70mm: 

  • Ground Floor - Concrete Slab
  • Ground Floor - Suspended Timber Joist
  • Ground Floor - Beam and Block
  • Ground Floor - Upgrading Existing Concrete Slab
  • External Wall - Timber Frame Internal Linings
  • External Wall - Timber Frame Sheathing
  • External Wall - Between Timber Frame Studs
  • External Wall - Solid Masonry Internal Linings
  • Pitched Roof - Over Timber Rafters
  • Pitched Roof - Sarking
  • Pitched Roof - Below Timber Rafters
  • Pitched Roof - Between Timber Rafters
  • Pitched Roof - Loft insulation - Between and Over Timber Joists
  • Flat Roof - Balconies & Terraces Over Joists
  • Flat Roof - Between Timber Joists
  • Flat Roof - Below Timber Joists

Discover our guide on the applications of Celotex insulation boards. 

Data Sheet (213.70 kB)
Customer Questions
Can I bend this board?
Celotex boards are a rigid insulation and will snap if you bend them. They are not flexible so cannot be manipulated in this way.
Will Celotex keep my room cold in summer?
Celotex Insulation works by preventing heat transfer from one side to the other and can prevent your home from overheating. In summer when the temperature outside is hotter than inside, insulation will help prevent your room from heating up. This is the opposite to in winter, when your room is warmer than outside, the insulation helps to prevent heat escaping.
Did you find what you were looking for?
More Information
Supplier Part NumberGA4070
Size1200mm x 2400mm

Orders and Delivery

Free delivery if your order is over £300 ex VAT. Orders between £100 - £300 ex VAT will be subject to a delivery charge of £50 ex VAT. Please note, we are unable to accept orders less than £100 ex VAT

When ordering on line you can specify the date of delivery, however we would not be able to specify the time of delivery on that day.

• Please note that we have a number of large vehicles, including articulated vehicles that may be used for delivery. Please advise us in the comments on your order if access to the delivery address is limited.

• Due to insurance guidelines, delivery personnel are unable to enter private residences. Delivery will be as far as possible to the kerbside of the delivery address. The recipient of the products is responsible for any additional lifting once the delivery has been made. Please bear in mind that Insulation products can be bulky and / or heavy.

• The delivery driver will require a signature to confirm the goods have been received.

 † Unfortunately we, Insulation Express, cannot deliver to the Highlands & Islands of the UK. However we will be happy to deliver to a freight forwarding company on your behalf.


Returns and Refunds

In the unlikely event that you need to return an item, please contact our team on [email protected] within 14 days of accepting delivery of the item.

Restocking charges may apply. We will discuss this with you upon receipt of the cancellation request. Restocking charges will be applied where the products are no longer required AND NOT for goods returned because either defective or damaged.

We usually charge 30% of value (minimum £25.00).

Please note that we cannot accept returns on special orders. Special orders may consist of items sent via third party shipping companies or made to measure products. If you are unsure on whether or not your item is a special order, please contact us on [email protected] prior to placing the order.

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