Loft Insulation Requirements

When you're installing new loft insulation, you must ensure it achieves the minimum energy efficiency levels detailed in the relevant Approved Documents. These documents outline the specific standards you need to meet.However, if reaching these exact values proves technically or practically difficult, you are still required to upgrade your insulation. In such cases, you should aim for the highest possible standard that will deliver a simple payback period of no more than 15 years through energy savings.There's a particular rule if your loft insulation work is part of a wider roof renovation project. If you're renewing more than 25 percent of your roof area, your new insulation absolutely must meet the full, stringent standards required by the Building Regulations Approved Documents.Finally, a crucial reminder: always make sure you do not block any ventilation points, especially those located at the eaves – the lowest edges – of your roof.