How Much Loft Insulation Do I Need?

Where the 270mm benchmark comes from, how to measure what you already have, and when topping up makes economic sense.

When evaluating your roofspace, the goal is always a balanced environment: sufficient insulation depth to hold heat inside living rooms, paired with unobstructed eaves airflow to keep structural timbers dry.

An in-person loft assessment checks your joist depths, hatch draught seals, and existing material condition before providing a written quotation.