Kingspan Kooltherm K103 Floor Insulation Board 50mm x 1200mm x 2400mm 17.28m2

£379.44 £316.20
In stock
Product Description

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

Kingspan K103 50mm insulation boards are lightweight, durable and extremely long-lasting. They are designed for use across concrete and timber floors, available in a range of size options. They are sustainably sourced and provide an excellent energy-saving solution for building works. 0mm

Pack: 6 boards

Other available thicknesses: 25mm, 70mm, 75mm & 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 50mm insulation? 

Brought to you by Kingspan - a market leader in thermal and acoustic insulation products - Kingspan K103 50mm is a fantastic product that reduces heat loss and is ideal for new builds and refurbishment works. 


The boards are made with a fibre-free rigid thermoset phenolic core and boast low thermal conductivity. As one of the thinnest available floor insulation products, you can achieve U-values with minimal thickness. 

They are an advanced solution for all types of floor insulation across concrete and timber floors and underfloor heating systems. You can also rest assured they boast a long lifespan when installed. 

Features and benefits of Kingspan K103 50mm: 

  • Can be used across multiple applications to insulate beam and block, concrete and timber floors.
  • Lightweight and extremely strong boards for fitting. 
  • Resistant to water vapour and unaffected by air infiltration. 
  • Indefinite lifespan. 
  • Compressive strength of 120 kPa.
  • Weight: Approx 3.70 kg/m2 at a thickness of 100 mm. 

 Applications for Kingspan K103 50mm: 

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

To find out more about the different types of insulation, read about the differences between Kingspan and Celotex

Product Brochure (3.87 MB)
Customer Questions
Is Kingspan 50mm K103 suitable to use with UFH systems?
Kingspan K103 can be used with most under floor heating systems. 
Which kind of facing does Kingspan K103 have?
Kooltherm K103 is faced on both sides with a glass tissue facing bonded to the insulation.
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More Information
Supplier Part NumberK103
Pack Size6
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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