What does a Deep Retrofit involve?
- The Deep Retrofit of a home or commercial building is a complete overhaul of the existing fabric of the building. The correct materials and fitting are crucial to ensuring a healthy building for both the occupants and the building structure itself.
- The most common works are as follows: External wall insulation, roof insulation, floor insulation, window upgrades with the inclusion of airtightness when replacing the windows and mechanical ventilation.
- The next step is to look at an efficient renewable heating system to support the transition away from fossil fuels. The typical heating system installed on a Deep Retrofit Pilot Project is an air-source heat pump.
- Mechanical ventilation to maintain good indoor air quality.
- Other renewable energy technologies such as solar photovoltaic panels battery storage solutions will help you achieve a truly Nett Zero Building which we have developed with some of our partners.
We install as standard a special plinth detail to all homes, using a rigid insulation board of extruded polystyrene which is tough, durable and does not absorb moisture. This plinth is rendered, a minimum of 150 mm high, and recessed to form a ‘drip’ with the main plane of insulation on the wall. The plinth is a traditional detail and protects the insulation from mechanical damage.
We install a new pre-formed powder coated aluminium sill to extend the sill to cover the thickness of the external insulation and render. These sills do not rust, require no maintenance and are waterproof. Each sill is individually measured and specially made for each window to ensure a perfect watertight finish. There are a number of colour choices available for the powder coated sill.
All external pipe work is removed, extended and returned into existing connections so no ground works are required. This is necessary to allow the external insulation system to completely cover the wall. All cast iron pipes will be replaced by Ecofix with PVC pipework as cast iron cracks very easily when it is removed.
All window and door reveal render is removed (where necessary) and insulated with a high performance insulation board to whatever thickness is possible given the window detail. This reduces the amount of cold bridging and heat loss in these areas.
ESB & GAS
All ESB and Gas meter boxes will be worked around with a finished detail as we are prohibited from moving them by the utility companies. All work near any ESB overhead wiring is done in accordance with the ESB’s Method Statement and approved detail.