Attic with wooden beams and exposed insulation on the floor.

Insulation for Lofts

Recticel provides loft insulation solutions for pitched roofs and loft floors, helping to improve thermal performance, energy efficiency and indoor comfort within your loft. Suitable for both new build and refurbishment projects, our range includes solutions for insulating roof spaces.

View our loft products

Heat rises and in an uninsulated or under-insulated home, the loft is where a significant proportion of it escapes. As one of the largest single surface areas in a building's fabric, the roof and loft space represent a major opportunity for reducing heat loss, improving occupant comfort and lowering energy demand.

Loft insulation is often the most cost-effective single upgrade available in a retrofit project, and it plays an equally important role in new build specification, where meeting Part L requirements depends on the whole building fabric performing as designed. Getting the loft right isn't just about ticking a regulatory box - it directly affects how a building performs in use, for the lifetime of the roof.

The impact

Poorly insulated lofts don't just waste energy - they have a knock-on effect across the whole building:

Higher energy bills: Heat lost through the roof has to be replaced, driving up heating costs for occupants.
Increased carbon emissions: Greater energy demand means a larger carbon footprint for the building, working against sustainability targets.
Reduced occupant comfort: Cold spots, draughts and temperature fluctuations are common symptoms of inadequate loft insulation.
Condensation and moisture risk: Poorly detailed or insufficient insulation can lead to cold surfaces where warm, moist air condenses - increasing the risk of damp and mould.
Regulatory non-compliance: Insufficient thermal performance can put new build and renovation projects at risk of failing to meet current Building Regulations.

Specifying the right loft insulation system from the outset helps designers and contractors avoid these issues, while delivering a building that performs as intended.

PIR: Built for performance in the Loft

PIR insulation is a strong fit for loft applications because it delivers high thermal performance without adding bulk, letting designers hit tight U-value targets even where void depth is restricted. It's lightweight and easy to cut and handle on site, which speeds up installation and reduces load on the roof structure, while its dimensional stability and low moisture absorption help it hold its performance over the long term. Combined with a long service life, this makes PIR a practical, low-hassle choice for both new build and retrofit loft projects.