Dimensions | 2400 × 1200 mm |
---|---|
Brand |
Kingspan |
Thickness |
50mm |
Material Type |
Phenolic |
Pieces Per Pack |
6 |
Sales Unit |
Pack |
Unit Coverage |
17.28m2 |
Manufacturers Reference |
K10350 |
Thermal Conductivity |
0.019W/mK |
Density |
40kg/m3 |
Fire Rating |
Euroclass C |
Edge Type |
Square |
Facing |
Glass Tissue |
Weight (kg/m2) |
1.89kg/m2 |
Product Range |
Kingspan K103 Floor Insulation Board |
Please note this item is a Special Order – see terms and conditions
Kingspan Kooltherm K103 50mm Insulation Floorboard (2400mm x 1200mm) – 17.28m2 pack
Request your delivery date in checkout
on orders over £350 +VAT
£364.80 Original price was: £364.80.£304.00Current price is: £304.00. 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 50mm
Kingspan K103 50mm – an insulation material manufactured with a phenolic core. The K103 floor insulation board has a thermoset fibre-free rigid phenolic core. The K103 board has glass tissue facings on each side.
Sustainability – The K103 floor board will help by reducing the heat levels lost through the building. This will reduce the contribution to global warming and in conclusion, have positive effects on climate change. Moreover, the lack of heat loss can save money on energy bills up to 30% per year.
Thermal – K103 has a thermal conductivity of just 0.019W/mK. Thermal conductivity means less heat will pass through the insulation boards. As a result, this will keep the internal temperature level. The thermal properties of the K103 50mm will also prevent heat and energy from escaping the building and because of this, the building will be a much more comfortable space.
The better the insulation in the walls, ceilings, and roof, the more heat is lost through the floor.
Storage – Stack the insulation boards on a flat surface, within a cool and dry environment. If left outside, cover the boards with weatherproofing materials. Do not apply pressure to the boards. This includes walking on the boards to avoid damage. If applying excess weight on the boards, as a result, they can crumble internally, and the thermal quality of the board will be affected.
Key Features of 50mm Kingspan K103
- Lightweight
- Great thermal qualities
- Temperature controlled internal climate
- Saves money on monthly bills
- Long lasting lifespan
- Durable and reliable
- Free from harmful gases (CFC and HCFC)
- They do not add to the formation of any gases with Ozone Depletion Potential (ODP) or Global Warming Potential (GWP)
- Floor insulator
- Great compression strength
- Resists moisture penetration
- Unaffected by air infiltration
- Non-deleterious material
50mm K103 floor insulation is 2400mm x 1200mm with thermal conductivity of 0.019W/mK.
50mm K103 Application
K103 50mm boards are rectangular in shape. The boards are designed for easy installation. The K103 are for floor insulation applications. See 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.
The 50mm is a board designed for floor applications. The boards are designed for commercial, residential, and industrial buildings as well as new builds and refurbs. In addition, K103 can help to meet building regulations.
The boards are extremely durable and last lasting. In addition, the 50mm insulation board will last for as long as the building does. The product performance will not reduce over time. Therefore, the K103 50mm is a well-used product within the construction industry. Moreover, the thinner nature of the 50mm board means this board is great for improving thermal quality whilst keeping as much space as possible.
The board can also be doubled up to achieve a higher thickness. Fit the boards doubled in a break bonded pattern with no two boards aligning.
How to Install K103 50mm floor Boards
Cut K103 insulation boards using a fine-toothed saw or a sharp knife. Use the sharp knife by scoring and snapping the boards and scoring the other side.
Using the fine-toothed saw by measuring and marking the board to size. After that, place the board on an elevated surface to allow the saw to cut through.
Always consult a building/construction professional before insulating your property because this can be a costly and time-effective mistake. Ensure the walls are free from condensation and mould before insulating. Please note this is a guide only.
Installation from above the floor joists
Firstly, Install Kingspan Kooltherm K103 in suspended floor constructions before the commencement of floor boarding. Ensure insulation boards are flush with the top surface of the joists. Support on minimum 25 mm x 25 mm treated softwood timber battens, proprietary galvanised steel saddle clips, or galvanised nails partially driven into the side of the joists.
Secondly, place battens and nails at an appropriate height to suit the thickness of the board being fitted. Nails should remain 40 mm proud of the joist.
Thirdly, cut the insulation boards to fit snugly between the floor joists. Fit boards so that they are supported by the battens/saddle clips or nails. Measure the distance between the joists prior to cutting the boards as spacings can vary.
Fourthly, if two layers are required, install insulation horizontally offset relative to each other. This is so that, as far as possible, the board joints in the two adjacent layers do not coincide with each other.
Note – Tightly butt together all board joins.
After that, fit all insulation boards tightly between joists and fill any gaps with expanding urethane sealant.
Finally, insulate any narrow gaps between a joist and perimeter with specially cut pieces of board. Support this on blocks nailed to the underside of the joists. Fill gaps less than 25 mm wide with expanding urethane sealant.
Note – Kingspan Kooltherm K103 is not suitable for installation directly over timber joists
50mm K103 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 |
50mm |
Material Type |
Phenolic |
Pieces Per Pack |
6 |
Sales Unit |
Pack |
Unit Coverage |
17.28m2 |
Manufacturers Reference |
K10350 |
Thermal Conductivity |
0.019W/mK |
Density |
40kg/m3 |
Fire Rating |
Euroclass C |
Edge Type |
Square |
Facing |
Glass Tissue |
Weight (kg/m2) |
1.89kg/m2 |
Product Range |
Kingspan K103 Floor Insulation Board |
Dimensions | 2400 × 1200 mm |
---|---|
Brand |
Kingspan |
Thickness |
50mm |
Material Type |
Phenolic |
Pieces Per Pack |
6 |
Sales Unit |
Pack |
Unit Coverage |
17.28m2 |
Manufacturers Reference |
K10350 |
Thermal Conductivity |
0.019W/mK |
Density |
40kg/m3 |
Fire Rating |
Euroclass C |
Edge Type |
Square |
Facing |
Glass Tissue |
Weight (kg/m2) |
1.89kg/m2 |
Product Range |
Kingspan K103 Floor Insulation Board |
10 reviews for Kingspan Kooltherm K103 50mm Insulation Floorboard (2400mm x 1200mm) – 17.28m2 pack
Question: | What products are in the Kingspan Kooltherm range? |
maxfrommarble |
Answer: | K5 External Wall Board, K15 Rainscreen Board, K103 Floorboard, K106 Cavity Board, K107 Pitched Roof Board, K108 Cavity Board, K110 Soffit Board, K110 PLUS Soffit Board, K112 Framing Board, K118 Insulated Plasterboard. | |
Question: | Can I use Kingspan insulation with underfloor heating? |
maxfrommarble |
Answer: | Yes, K103 insulation is suitable for use below underfloor heating systems. In conclusion, in a typical dwelling, the required thickness of Kooltherm floor insulation should be loose laid above the damp proof membrane with a strip of the same insulation (minimum 25 mm) placed vertically around the exposed perimeter of the floor slab to prevent cold bridging. A polythene sheet should then be placed above the insulation before installing the underfloor heating system and pouring the concrete screed. |
Katarzyna –
Top-quality insulation, great prices, and brilliant service
David –
Very happy with how durable K103 is. It’s a solid choice for both residential and commercial applications
Kofi –
I’m completely satisfied with the insulation, delivery, and customer service.
Sello –
I’ve tried other insulation brands, but Kingspan always comes out on top in terms of performance and value.
Connor –
Break-bonded 2 layers in the floor
Kevin –
Awesome product, highly recommended.
Aiden –
Trade Insulations succeeded where others failed. I was told by others (who I won’t name!) that my area has no coverage but Trade managed it
michael taylor –
Impressed with this one.
Luke Anthony –
Really high spec product compared to other manufacturers, worth the extra money in my eyes
Loren Derver –
Quick and easy delivery