Project Description

First Eco House In The West of Ireland

This was the first house in the West of Ireland to be certified as having met the stringent passive requirement laid down by the Passive House Institute in Germany.

The build lasted a total of five months, but the careful planning and design stages both took a further five months.

Work commenced on insulating the raft foundation using expanded polystyrene (EPS) along with low carbon concrete, which resulted in the achievement of a cold bridge free foundation.

We insulated the timber frame structure using celluslose as the main insulation product along with rock wool, wood fibre boards and OSB board. The use of materials with low carbon footprint is key to the overall energy measurement at the end.

Like all passive houses, glazing is predominately placed on the southern elevation in order to capture the majority of solar gains. The windows used were triple glazed with insulated frames to minimize heat loss. 

Project Details

Design/ Main Contractor: Mannion
BER/ Airtightness: Energy Matters
Structure:  Eco Timber Frame

Construction Details

Build Type: Timber Frame
Windows: Triple Glazed

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Air tightness was essential in this build. Once placed by our team, we proceeded to explain the importance of protecting this to all trades people who visited the site from here on in. An independent air tightness test gave the house a score of 0.28 air changes her hour.  The MHRV (mechanical heat recovery ventilation) works hand in hand with a high level of air tightness. This machine delivers filtered air without compromising the comfort of the building.

The owners chose LED lighting for the house, so as to further reduce the energy consumption. All lighting was installed by our team. Also evaculated solar tubes were installed to provide hot water all year. A small wood burning stove was installed to boost hot water demand in the winter time.

The total heat load for the building is eight watts per square metre or 10kwh/m2 per annum. To put it another way, a litre of oil per square meter will heat this house for the year. This is a 200 square meter building, so that works out at 200 litres of oil for the entire year. That’s a reduction of nearly 90% on a standard home.

Interested in hearing more about this case study? Give us a call today 01-5313655.