When do I need to upgrade the insulation on a refurbishment?
Roofing contractors are required to upgrade insulation in the following cases:
1. When there is a new construction to form an extension, or when adding a conservatory over 30m2
2. If there is a material change of use – for example, if you are converting a non-dwelling to a dwelling
3. When more than 25% of an existing thermal element is being renovated.
For example, it is now necessary to upgrade the thermal performance of a pitched roof at rafter level to 0.2W/m2K, and, while the membrane is being replaced on an existing flat roof, to ensure that the roof meets a minimum U-value of 0.25W/m2K.
Contractors can look to Part L of the Building Regulations for detailed guidance and Parts L1B and L2B. These can be downloaded free from the website, the Planning Portal, the government’s online planning and building regulation resource. I would also recommend liaising with your Local Area Building Control to ensure that any proposed reproofing work is fully compliant.
Looking ahead, the proposed NFRC Competent Roofer scheme will, in the future, provide training in line with the latest building regulations.
1. When there is a new construction to form an extension, or when adding a conservatory over 30m2
2. If there is a material change of use – for example, if you are converting a non-dwelling to a dwelling
3. When more than 25% of an existing thermal element is being renovated.
For example, it is now necessary to upgrade the thermal performance of a pitched roof at rafter level to 0.2W/m2K, and, while the membrane is being replaced on an existing flat roof, to ensure that the roof meets a minimum U-value of 0.25W/m2K.
Contractors can look to Part L of the Building Regulations for detailed guidance and Parts L1B and L2B. These can be downloaded free from the website, the Planning Portal, the government’s online planning and building regulation resource. I would also recommend liaising with your Local Area Building Control to ensure that any proposed reproofing work is fully compliant.
Looking ahead, the proposed NFRC Competent Roofer scheme will, in the future, provide training in line with the latest building regulations.
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