Flat Roof Insulation

Do you want to purchase some flat roof insulation for your home or property? Welcome to Online Insulation. Based in the heart of the UK, we are a committed company that is proud to offer a huge range of thermal, acoustic and fire protection insulation as well as dry lining to the professional trade. We hold comprehensive stocks of quality products and provide complete solutions for interior building specialists, contractors and builders. We also have over 100 distribution points available to us to enable us to source your requirements in a timely manner - so you know we are the company you need to contact today.

You would use our flat roof insulation during the construction of a property, which is the best way to achieve a well-insulated, competent and good-looking structure. However, the process can easily create leaks, moisture and damp if not done properly - which is why we recommend you are trained in the matter. The work can be undertaken by capable DIYers but we would recommend that if you are not fully confident with the process, that you consult or employ a professional to undertake the work.

Looking for Flat Roof Insulation?

Across our website, we stock a wide range of flat roof insulation including, 150mm Celotex XR4150 Insulation Boards. This product can be suitable for a number of different applications, including roof, wall and floor insulation. It is one of our most high performing insulation solutions, which is represented in our depth of product offering. It has also been specifically designed to fully meet the requirements of current legislation including Part L, BREEAM and the Code for Sustainable Homes, as well as the demands of building professionals, specifiers and users.


By insulating your roof, you will effectively be keeping your home warm in winter and cool in summer. This means that your house will maintain a more stable temperature throughout the year, providing a pleasant indoor environment to live in. By installing wall and flat roof insulation the air leakage rate of your house will be reduced dramatically and your heating and cooling bills will be cut by up to half.


Here at Online Insulation, we feel that we can offer both informed and impartial advice to assist in finding the right solution for our customers. Our entire team are incredibly experienced in all the work they do and are very devoted to their trade. We also have a second-to-none reputation for our customer support and reliability. This is something we hold great pride in sustaining with each of the clients we work with.