Case study
Loft Insulation Case Study — Traditional Loft Fully Insulated From Hatch to Gable, Liverpool
Claire's bedrooms stayed cold despite a new boiler — because the 44m² loft had never been insulated. We installed a full 300mm Knauf glass mineral wool layer from the hatch to the gable wall.
What we found
- •A traditional pitched loft with exposed joists from the hatch to the gable wall
- •No continuous insulation layer across the floor
- •An older timber hatch frame that required careful edge detailing
- •Dust and loose debris within several joist bays
The problem
Claire contacted us because the bedrooms felt cold despite recently replacing the boiler. The heating system was working correctly, but the loft had never been upgraded and was allowing a large amount of heat to escape.
The survey confirmed that the joists were exposed across the full floor. The absence of insulation explained why improvements to the heating system had not delivered the expected comfort.
Our assessment
The loft floor measured approximately 44m². The roof timbers and gable wall were in suitable condition, so we recommended 300mm of Knauf glass mineral wool at ceiling level. The system comprised 100mm between the joists and a 200mm cross-laid top layer.
The installation
Loose debris was removed from the joist bays before the first layer was installed. The 100mm wool was cut around the hatch trimmers and fitted closely against the timber without being compressed.
The 200mm top layer was laid at right angles to the joists, creating continuous coverage from the hatch to the gable wall. The eaves were finished carefully to preserve airflow.
The result
The finished loft had a clean and consistent 300mm layer across the full floor. Claire reported that the bedrooms felt warmer and that the house retained heat for longer after the heating switched off.
The installation helped to
- Improved the effectiveness of the existing heating system
- Reduced heat loss across the full loft floor
- Improved comfort in the bedrooms
- Reduced cold bridging through the joists
- Created a cleaner and more consistent loft space
Free, no obligation
Ready to arrange a free loft assessment?
Tell us about your property and we will review your loft requirements, then provide a written recommendation and quotation before any work begins.