The Client Capcon Building
Cluain Dara Estate is a low-density residential development of 106 houses, located in Derrinturn, County Kildare. Twenty-four homes in Phase One were completed in 2006; however, following the economic downturn of that period, the subsequent phases were put on hold. In 2018 Capcon Building were engaged to complete Phases 2 and 3 – but they faced a challenge.
The Challenge Improving BER C to A2
Although it would have been possible to “get away with” delivering C-rated homes, the developer Alder Homes (formerly Landport) recognised that home-buyers were demanding better energy efficiencies. They tasked Capcon Building with improving the BER rating from High C to A-rated, within the constraints of the existing planning.
We talked with Robert Finn, Construction Director of Capcon Building about the difficulties his team faced in working with planning that dated back to 2006.
The Work Using ICF to Achieve NZEB
The team at Capcon Building deployed further innovations in the third phase to obtain full NZEB compliance for the next phase of 22 houses. These innovations included employing the Altherm ICF build process alongside air-to-water heat pumps and heat recovery systems which brought them well within the threshold for achieving NZEB and BER rating of A2.
We asked Robert why he decided on the Altherm ICF system for the building project. Robert said:
Robert was enthusiastic about how the utilisation of ICF improved programme time.
Robert was also very impressed with the proprietary Altherm cavity closers that are used in conjunction with the ICF blocks minimise thermal bridging. Using cavity closers around the window and door openings ensures that heat loss is minimal and typically a very low thermal bridging factor of 0.04 is delivered. It’s a vital step in achieving an overall u-value of below <0.18.
Comparison With Other construction Methods
Results Recognised for Excellence
The industry has recognised Capcon Building’s achievement with Cluain Dara Estate as an example of construction excellence, with particular reference to achieving an A2 rating within the existing 2006 planning. Capcon Building and the Cluan Dara development have been nominated for both an Irish Building and Design award in late 2019 and an ICE Award in 2020.
Capcon Building is currently well underway with construction of 22 more properties in Ballintine Park in Allen, County Kildare. It’s their second development using Altherm ICF and the team are again seeing the benefits of the construction method.
Talk to Us
Talk to us about how Altherm ICF walls can play a crucial role in helping you achieve both nZEB and A2 standards and improve your building program time.