Take a deep dive into the importance of precision when specifying insulation with this spotlight on leading insulation manufacturer, Paroc®.
2 June 2025
Technical insulation must be specified with precision and accuracy. Insulation manufacturer and NBS partner Paroc®, part of Owens Corning, has released a UK thickness guide that helps specifiers choose the correct insulation thickness every time. In this NBS spotlight, we explore how Paroc® is assisting specifiers to make more accurate technical decisions…
Specifiers must carefully consider insulation thickness at the design phase. If the wrong thickness is chosen, an installer may have to remove and reinstall pipework, often at a significant cost and inconvenience. Even minor deviations in insulation thickness can compromise an entire system, so it’s absolutely crucial that you get it right from the start.
The decisions about technical insulation systems will impact energy efficiency, compliance and long-term performance. Mistakes or even accidental oversights can lead to significant delays and soaring expenses, which is why both specifiers and installers need a reliable and effective way to make more consistent technical decisions.
Recognising this, Paroc® has developed a comprehensive UK Thickness Guide, a reliable resource that helps specifiers choose the right insulation thickness for every project.
Installers and specifiers can turn to Paroc® insulation to meet high technical standards. Paroc®’s stonewool insulation offers outstanding thermal performance, high durability, and fire resistance. The brand remains committed to consistent product quality and full compliance with updated specifications.
In addition to the UK Thickness Guide, Paroc® also offers a free thickness calculation tool, Calculus, which is updated to the latest calculation standard ISO 12241:2002.
The update to BS5422:2023 replaces the 2009 version, bringing key changes around specification and improving efficiency. Pipe sizes are listed using a “less than or equal to” system, which reduces the need for interpolation and helps enhance the overall thermal efficiency of a project. The updated standard now also carries tables that provide additional clarity for specifiers. Paroc®’s product range allows specifiers to remain current with the latest standards.
Additionally, now that the BIM-aided design of HVAC installation is the standard for professional specifiers in Europe, Paroc® has introduced a tool that enables the intelligent, fully automated selection of insulation solutions for projects that are fully compliant with BS 5422. Click here to learn more.
The importance of specifying the correct thickness relies on working with suppliers that you can trust. Work with Paroc® to guarantee reliable, high-quality insulation for every project to avoid installation errors and achieve peak performance.
There’s no room for error. Use Paroc’s UK Thickness guide to ensure every specification is as precise as possible. Browse and specify Paroc® products using NBS Source, or visit this page to view HVAC solutions.
