Housebuilders Hub

House Builder Knauf Insulation

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Part L guide

Welcome to the Knauf Insulation Housebuilders Hub.  

Here, you’ll find practical tools and information to guide you through the new updates to Approved Document L of the Building Regulations for England.  

We’ve built lasting relationships with housebuilders across the UK, by consistently delivering product performance and a high-quality service. That experience means we understand the challenges that come with regulatory updates, and we’re here to help. 

We also know that every development is different, so we’ve created these resources to help you find the best route to compliance for your business and your projects.  

Use the library below to access our free insights and advice, and don’t forget to subscribe, so we can let you know when new materials are added.  

 Subscribe to the Hub

What's new on the Hub?

Fire Safety Jargon Buster

Fire resistance, Euroclass and Part B explained.

Streamline your specifications

Learn more about Rocksilk® RainScreen Cavity Systems.

Product Finder Tool

Find a mineral wool solution to suit your build.


Part L Advice

Everything you need to know about the latest updates to Part L of England’s Building Regulations. From quick-read infographics to our full Part L Guide.

Fire Safety

Quick-read infographics on Part B of England’s Building Regulations, along with advice on choosing the right products for your project.

U-values & Psi-values

Use our U-value & Psi-value calculators. Learn about Part L U-values and how products like DriTherm® Cavity Slab can help achieve compliance.


Understand embodied carbon with our full guide or download our quick-read infographic on reducing embodied carbon in housebuilding.

Other Regulations

Learn what the new Part O Building Regulations mean for you. Take our Regulation Changes CPD or view our Regulatory Roadmap.

Stay in the loop

Subscribe to the Housebuilders Hub and be the first to know when we upload new tools and resources.