Struggling to find a dependable supplier of insulation solutions and dry lining resources? Fortunately, the team at Online Insulation is here to help. Since our establishment in 2015, we have gained a glowing reputation due to our ability to combine expert product knowledge with first-class customer service. With over 15 years of experience, we also have an understanding of many specialist markets, which is why we have the capabilities to supply thermal and acoustic insulation, fire protection and moister resistant plasterboard. If you are searching for a specific product or insulation type, don’t debate to get in touch with our team, we are certain we can assist. 

Why Buy Celotex CR4150 From Us? 

As one of the highest-rated suppliers for insulation solutions, we stock from several brands, with a few worth mentioning including Kingspan Phenolic insulation, Rockwool and Velux. However, if you specifically require insulation boards, then we would always recommend the Celotex brand, more specifically the 150mm Celotex XR4150 Insulation Board 2400x1200mm. As this is a high-performance rigid PIR insulation board, it is suitable for various applications including roofing, walls and flooring insulation. Whatmore, this product also achieves the A+ rating when compared to the BRE Green Guide which evaluates the environmental impact of the insulation. 


But why use PIR insulation boards? 


Polyisocyanurate is one of the most effective materials for insulation boards as it’s able to provide thermal insulation which is in full compliance with the current legislation including part L, BREEAM and Code for Suitable Homes. The Celotex XR4150 is a prime example of this, which is why it’s one of the most favoured choices upon building professionals, homeowners and within new build projects as it’s able to reduce costs and save money in the long term. 


For those that are interested in purchasing Celotex XR4150 from Online Insulation, you will be pleased to hear that we have implemented a strong delivery service. With over 100 distribution spots around the country, our team is able to source the required items on your order so that we can dispatch and deliver items within as little as 2-3 working days. Whatmore, on all orders over £300, you will be entitled to free delivery, though we only charge a small fee for all orders falling under this threshold. 


In order to purchase the highly-claimed Celotex XR4150 insulation board, be sure to head over to the Online Insulation website today. That being said, if you have any questions or concerns, please don’t hesitate to call us on 01509 649065 to speak to our customer service team who will be happy to assist. If you would prefer to write, feel free to email us at, where you can expect a reply within a single working day.