This post-primary school went from a D1 to a B3 Building Energy Rating (BER). To achieve this, extensive fabric upgrades were carried out through the 2020 Schools Energy Retrofit Pathfinder programme.

Energy upgrades involved in this retrofit

a school corridor
MeasurePre Works StatusPost Works Status
Energy Consumption 209 kWh/m2 To be confirmed
Building Energy Rating D1 B3
Lighting Upgrade T8s LED with occupancy and daylight controls
Walls U Value 0.55 W/m2k 0.21 W/m2k
Windows U Value c.2.8 W/m2k 1.4 W/m2k
Roof U Value 0.49 W/m2k TBC <0.16 W/m2k
Heating System Type Gas boiler High efficiency gas boiler including pipework insulation and BMS
Heating System Efficiency Unknown 94%
Solar PV 0 kWp 4 kWp


St. Anne's Community School was selected through the Public Sector Pathfinder Programme. The school was comprehensively assessed to identify suitable upgrade measures. These needed to deliver value to both the school and the programme learnings.


Fabric upgrades included:

  • filled cavity wall with insulation
  • insulated exposed ring beam under canopy and soffit to prevent cold bridging
  • replacement of existing windows, doors and roof lights
  • installation of air tightness membrane
  • removal and replacement of existing rockwall insulation with of 150mm insulated plaster board for roof

Mechanical and electrical upgrades included the installation of the following:

  • LED lighting system with occupancy and daylight control
  • 4 kWp Solar PV system
  • time controls on water heaters
  • new high-efficiency gas boilers, insulation of pipework and new building management system

About the programme

This energy upgrade was delivered through the Pathfinder programme in collaboration with the Department of Education. This programme is paving the way for a national programme for the energy retrofit of schools built before 2008.

The Schools Energy Retrofit Pathfinder programme is funded by the Department of Education and Department of the Environment, Climate and Communications. The programme is administered by the Planning and Building Unit in the Department of Education with their delivery partner Limerick Clare ETB. and the Sustainable Energy Authority of Ireland.

Learn more about the Pathfinder programme