St Patrick’s National School, Slane – Deep Energy Retrofit

The completed works achieved a 50 percent improvement in overall energy efficiency alongside a 51 percent reduction in carbon emissions, successfully bringing the school to its target Building Energy Rating of B1. The retrofit has delivered lasting environmental benefits while creating a more comfortable and efficient learning environment for staff and pupils.

The Task

McKeon Group was appointed as Project Supervisor Construction Stage and was responsible for overseeing all site activities, managing health and safety compliance and coordinating the full supply chain throughout the project. A key priority was minimising disruption to the school community. To achieve this, the most invasive elements of the works were carefully programmed and completed during the summer holiday period, supported by phased planning and ongoing communication to ensure the school remained safe, operational and fully informed at all times.

The Solution

The retrofit works involved extensive upgrades to the building fabric, mechanical, electrical and ventilation systems, supported by associated general and enabling works. Building fabric improvements included the installation of new aluminium windows and doors along with timber windows and doors to the original school block, ensuring sensitivity to the existing character of the building. Internal timber linings, cills and facings were installed, rooflights were fully replaced and a new insulated flat roof system was introduced. Thermal performance was further enhanced through the installation of internal wall insulation and pumped cavity wall insulation throughout the building.

Mechanical upgrades delivered a modern and efficient heating solution aligned with the school’s decarbonisation objectives. These works included the installation of low‑temperature hot water air source heat pumps for both space heating and domestic hot water, alongside an LPG gas boiler as part of a hybrid heating strategy. The heating system was supported by a complete upgrade of the boiler house, incorporating new buffer vessels, pump sets and a low loss header, all fully integrated through a building management system. New pipework distribution and radiators were installed throughout the school to ensure consistent and controllable heat delivery.

Electrical improvements included the installation of a new low‑voltage distribution system and a full LED lighting upgrade across the school. Intelligent lighting controls were introduced to improve usability and efficiency, while a complete emergency lighting system enhanced safety. Small power installations and containment upgrades were also carried out to support the school’s ongoing operational needs. Together, these upgrades provide improved control, reliability and long‑term efficiency.

To further enhance indoor air quality and energy recovery, Mechanical Ventilation with Heat Recovery systems were installed, including both floor‑standing and ceiling‑mounted units. These systems now deliver fresh, tempered air throughout the building while recovering heat that would otherwise be lost.

General and supporting works included groundworks and civil adjustments, builder’s works to facilitate mechanical and electrical installations and all associated painting, patching and reinstatement. These elements were completed with careful attention to visual coherence, durability and compliance with school safety requirements.

The Results

The success of the project was driven by proactive planning, clear communication and strong collaboration between all stakeholders. McKeon Group’s on‑site management team worked closely with the design team, the school principal and staff and specialist supply chain partners to ensure seamless coordination throughout the programme. This collaborative approach enabled smooth delivery, high standards of workmanship and the successful achievement of all performance targets under the RePowerEU programme.

McKeon Group is proud to have delivered a high‑impact retrofit that significantly improves comfort, safety and sustainability at St Patrick’s National School, creating a healthier and more energy‑efficient environment for current and future generations of students.