Dimensions | 2400 × 1200 mm |
---|---|
Brand |
Kingspan |
Thickness |
120mm |
Material Type |
Phenolic |
Pieces Per Pack |
2 |
Sales Unit |
Pack |
Unit Coverage |
5.76m2 |
Manufacturers Reference |
K103120 |
Thermal Conductivity |
0.019W/mK |
Density |
40kg/m3 |
Fire Rating |
Euroclass C |
Edge Type |
Square |
Facing |
Glass Tissue |
Weight (kg/m2) |
4.48kg/m2 |
Product Range |
Kingspan K103 Floor Insulation Board |
Please note this item is a Special Order – see terms and conditions
Kingspan Kooltherm K103 120mm Insulation Floorboard (2400mm x 1200mm) – 5.76m2 pack
Request your delivery date in checkout
on orders over £350 +VAT
£296.10 Original price was: £296.10.£246.75Current price is: £246.75. ex VAT
In Stock

Please note this item is a Special Order – see terms and conditions
EXCELLENT Based on 970 reviews Owen Taylor2025-02-25Trustindex verifies that the original source of the review is Google. Great service, very easy to order and competitive prices. Yvette Mitchell2025-02-25Trustindex verifies that the original source of the review is Google. A great company to deal with and highly reasponsive. A special mention to Freya, many thanks! John Patmore2025-02-23Trustindex verifies that the original source of the review is Google. Great Prices, Delivery was spot on as stated Ben Betts2025-02-21Trustindex verifies that the original source of the review is Google. Great company to deal with. Web site was easy to use delivery was 3 working days. I would use them again. kuberlux2025-02-20Trustindex verifies that the original source of the review is Google. Good quality product and fast delivery. Will be using them again. Kevin T2025-02-20Trustindex verifies that the original source of the review is Google. Insulation delivered well and promptly. Everything i could’ve asked for, would use again and thoroughly recommended. gary while2025-02-19Trustindex verifies that the original source of the review is Google. Good product good price and delivered on time pleasure to deal with thanks Mark Scarborough2025-02-18Trustindex verifies that the original source of the review is Google. Quality product, super quick delivery. Most of all the best price out there. Customer service was also brilliant too!
Kingspan K103 120mm
Kingspan K103 120mm – a high-quality insulation material made of premium performance rigid phenolic insulation. In addition, the boards have glass tissue facings bonded to each side. The boards are lightweight. As a result, they’re easy to cut, handle and install. 120mm K103 is reliable and durable because of its great lifespan that does not degrade with time.
120mm K103 Kingspan insulation is a popular choice of thickness because this product thickness is great for use in floor applications.
120mm K103 key features:
- 2400mm x 1200mm
- Thermal conductivity 0.019W/mK
- Water repellent – therefore will not absorb water
- No maintenance required
- Compressive strength 120kPa at 10% compression
- Free from harmful gases including CFC and HCFC
- Zero Ozone Depletion Potential (ODP) as well as Low Global Warming Potential (GWP)
120mm Kingspan K103 Board Application
K103 120mm is suitable for multiple building types. For example, residential and commercial buildings including new builds and refurbs. Install K103 in floor applications – see details below.
- Beam and dense block ground floors – Insulation below the floor screed.
- Suspended timber ground floors – Insulation between joists.
- Solid concrete ground-based floors – Insulation below the floor slab.
- Solid concrete ground-based floors – Insulation below the floor screed.
- Cut K103 120mm with a sharp knife or fine-toothed saw. Ensure accurate trimming to achieve close-butting joints and continuity of insulation.
- Consult a professional before insulating your property.
K103 Specifications
120mm Kingspan K103 boards hold great thermal qualities and will keep heat inside the property. In addition, this will reduce energy bills by up to 30%. This means cooler summers and hotter winters within a sustainable property because of the level of internal climate. The plastic packaging of Kingspan Insulation products, which is recyclable, should not be considered proper outdoor protection.
Certifications:
- ISO 9001: 2015 (Quality Management Systems. Requirements)
- ISO 14001: 2015 (Environmental Management Systems. Requirements)
- ISO 45001: 2018 (Occupational Health & Safety Management Systems)
- ISO 50001: 2018 (Energy Management Systems)
- BBA Certificate 16/5299
- Fire performance – Euroclass RtF C-s2,d0 to BS EN 13501-1: 2018.
Dimensions | 2400 × 1200 mm |
---|---|
Brand |
Kingspan |
Thickness |
120mm |
Material Type |
Phenolic |
Pieces Per Pack |
2 |
Sales Unit |
Pack |
Unit Coverage |
5.76m2 |
Manufacturers Reference |
K103120 |
Thermal Conductivity |
0.019W/mK |
Density |
40kg/m3 |
Fire Rating |
Euroclass C |
Edge Type |
Square |
Facing |
Glass Tissue |
Weight (kg/m2) |
4.48kg/m2 |
Product Range |
Kingspan K103 Floor Insulation Board |
Dimensions | 2400 × 1200 mm |
---|---|
Brand |
Kingspan |
Thickness |
120mm |
Material Type |
Phenolic |
Pieces Per Pack |
2 |
Sales Unit |
Pack |
Unit Coverage |
5.76m2 |
Manufacturers Reference |
K103120 |
Thermal Conductivity |
0.019W/mK |
Density |
40kg/m3 |
Fire Rating |
Euroclass C |
Edge Type |
Square |
Facing |
Glass Tissue |
Weight (kg/m2) |
4.48kg/m2 |
Product Range |
Kingspan K103 Floor Insulation Board |
10 reviews for Kingspan Kooltherm K103 120mm Insulation Floorboard (2400mm x 1200mm) – 5.76m2 pack
Question: | Does insulating your floor reduce hearing costs? |
maxfrommarble |
Answer: | Insulating your floor will help reduce heating costs. In addition to this, a properly insulated ground floor will leave rooms feeling more comfortable. The rooms will also require less time to warm up. In short, up to 15% of the heat from a room can be lost through uninsulated ground floors. More heat will be lost through floors when other areas are thermally improved. For example, if the walls have great thermal insulation, the heat will leave through areas with poor insulation, such as the floor. Upgrading and insulating existing solid or suspended floors should not be forgotten about. | |
Question: | What is Phenolic insulation? |
maxfrommarble |
Answer: | Phenolic insulation is a rigid, closed-cell foam product that offers very good performance due to low thermal conductivity. Phenolic foam insulation is made in large batch and used to create other insulating material. This includes, pipe covers, curved segments, tank heads and sheets. |
Akira –
I’ve used other insulation before, but none have worked as well as the K103. It provides great thermal performance, it’s easy to work with, and it’s priced fairly for the quality
Harry –
Competitively priced product
Vladimir –
Cheers frey for checking how my delivery went
Yash –
The delivery driver was an absolute legend
Sunil –
great customer care – john
Siphosethu –
No more cold spots in my home since installing this insulation. Highly recommend!
Isaiah –
Got delivery for free.
Patricia –
Very responsive company, product was perfect.
Austin –
Ordered 120mm K103 and got it exactly when I asked for it. Perfect
Mary St Compare –
My builder tried to charge me £660+vat a pack and found it here with Trade Insulations for half the price, spoke to one of the girls in sales and got it for me in a couple of days. Very happy with price and service – George the driver was very nice.