Kingspan Kooltherm K103 Floor Insulation Board 75mm x 1200mm x 2400mm 11.52m2

£372.24 £310.20
In stock
Product Description

We are only able to supply in the stated pack quantity.

Providing a fantastic level of performance for new builds and refurbishment, the Kingspan K103 75mm boards provide a thermal conductivity of just 0.019 W/mK across all thicknesses, achieving U-values with minimum thickness. They can be used to insulate beams and blocks, concrete and timber floors.

Size: 1200mm x 2400mm

Pack: 4 boards

Other available thicknesses: 25mm, 50mm, 70mm & 100mm

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 Kingspan K103 75mm insulation? 

Offering domestic and commercial insulation, the K103 75mm boards are an excellent solution for sustainability. The boards are designed with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). They also have a glass tissue-based facing, which is bonded to the insulation core during production. 


The strong and reliable boards can boast an indefinite lifespan, making them a cost-effective option for any building works. They can also reduce the cost of other related items, including soil removal and service connections. 

With other features such as a non-deleterious material and water resistance, Kingspan insulation is a brilliant floor insulation solution. 

Features and benefits of Kingspan K103 75mm: 

  • Designed for solid concrete and timber floor applications. 
  • Great option for underfloor heating systems. 
  • Lightweight boards for transport and installation, with a rigid thermoset phenolic core that is free from fibres.
  • Unaffected by air infiltration. 
  • Resistant to solvents, fungi and rodents.
  • Compressive strength of 120 kPa.
  • Weight: Approx 3.70 kg/m2 at a thickness of 100 mm. 

Applications for Kingspan K103 75mm: 

  • Beam and dense block floors
  • Suspended timber floor
  • Solid concrete floor
  • Underfloor heating systems 

For more information on Kingspan and other insulation brands, read about the differences between Kingspan and Celotex

Product Brochure (3.87 MB)
Customer Questions
Can Kingspan K103 be used on my concrete floor?
Kingspan K103 is suitable for a range of floor applications including a solid concrete floor, beam and block floors and suspended timber floors.
Did you find what you were looking for?
More Information
Supplier Part NumberK103
Pack Size4
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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