YBS multifoil insulation

Part L Building Regulations: recent changes increase importance of home insulation

Part L of the Building Regulations focuses on conserving fuel and energy, setting the standard for energy-efficient designs in both new and existing homes. It consists of four volumes, covering new dwellings, existing dwellings, new non-residential buildings and existing non-residential buildings. In June 2022, Part L saw some important regulation changes focusing on improving the energy efficiency of homes through enhanced insulation requirements. On June 15, 2023, the grace period for compliance with the new Part L ended.

Part L Building Regulations changes

Building Regulations are subject to periodic updates in order to adapt to evolving technologies and ensure continuous improvement. The changes to Part L of the Building Regulations pave the way for the Future Homes and Building Standard that will come into effect in 2025 to ensure an emission reduction of 75 to 80% for all new UK residences.

The most important changes to Part L are the new carbon emission target and new maximum U-values for walls, windows, roof lights and doors. More specifically, Part L now demands a 31% carbon-emissions cut for all new homes, and a 27% cut for new non-domestic buildings. The changes are crucial for several reasons:

1.     Energy efficiency

The Regulations aim to reduce energy consumption in homes by improving insulation levels. Well-insulated homes require less energy for heating and cooling, leading to lower energy bills and reduced carbon emissions.

2.     Climate Change Mitigation

By improving energy efficiency, the changes to Part L contribute to the UK’s efforts to mitigate climate change. Reducing carbon emissions from homes is crucial to meet national and international climate targets.

3.     Comfort and health

Effective insulation helps maintain a more consistent and comfortable indoor temperature throughout the year. Proper insulation reduces drafts, condensation and moisture build-up, creating a healthier environment and reducing the risk of health problems associated with dampness.

4.     Future-proofing buildings

The updated regulations future-proof newly built and renovated homes, by ensuring improved energy efficiency and by preparing homes for more stringent energy efficiency requirements in the years to come.

Multifoils help comply with Part L changes

To maximise airtightness, optimise insulation and eliminate thermal bridging, the right insulation materials, installed according to best practices and industry standards, are key. Using multifoils to comply with the updates to Part L of the Building Regulations offers several advantages over using traditional insulation materials.

1.     Improved thermal performance

Multifoil insulation provides a high level of thermal resistance, which can lead to improved energy efficiency and reduced heat transfer

2.     Thin and lightweight

Multifoil insulation is thinner and lighter than many other insulation materials, allowing for easier installation and potentially reducing the impact on building design and structure. 

3.     Reflective properties

Multifoil insulation reflects radiant heat, helping to maintain a comfortable indoor temperature and reducing reliance on mechanical heating or cooling systems. 

4.     Versatility

Multifoil insulation can be used in various applications and is compatible with different types of construction, making it a flexible solution for different projects. 

Get in touch

Our multifoil insulation products are an improved solution compared to traditional materials. Would you like to know more? Our experts are happy to help. If you are a builder, the updated Part L of the Building Regulations asks that you meticulously document the materials and systems used. To help you meet this requirement, we can provide U-value calculations for roofs and walls.