A 1960’s bungalow is expected to become Jersey’s first EnerPHit certified home thanks to an extensive refurbishment, featuring the Kingspan TEK® Building System.
The owners prepared a sensitive redesign and extension of their own property, set within Jersey’s Green Zone conservation area. The final home combines a range of traditional materials, with the high performance building envelope specification essential to meet the voluntary Passivhaus EnerPHit standard.
To deliver this high level of fabric performance, Jeco Homes Ltd., a Kingspan TEK® delivery partner in Jersey, used the Kingspan TEK® Building System to replace the property roof and to form the walls of the new extension. Kingspan TEK® Building System panels comprise a high performance insulated core sandwiched between two layers of OSB/3, allowing them to deliver outstanding thermal performance.
For the walls of the new extension an additional 50 mm layer of premium performance Kingspan Kooltherm K5 External Wall Board was fitted with the Kingspan TEK® Building System panels. This allowed the extension walls to achieve a U-value of just 0.16 W/m².K.
To provide further space within the property, the original roof was replaced with Kingspan TEK® Building System panels and the pitch was changed from 30 to 40 degrees. This allowed a new bedroom accommodation to be created within the roof space. The panels were simply lifted into place with a mobile crane and again fitted with a 50 mm thickness of Kingspan Kooltherm K5 External Wall Board. The new roof achieves a U-value of 0.18 W/m².K.
In addition to excellent thermal performance, the EnerPHit standard also requires air loss from properties to be limited to 1 air change per hour @ 50 pa. The unique jointing system of the Kingspan TEK® Building System helps to create highly airtight buildings and with the internal airtight membrane, the property easily met this requirement.
The owners commented:
“The Kingspan TEK® Building System helped us to achieve the required fabric and airtightness performance simply and with a much reduced construction period than may otherwise have been possible.”
At the high levels of airtightness required by the EnerPHit standard it is essential to maintain airflow with a mechanical ventilation and heat recovery system (MVHR). The MVHR system uses heat from outgoing stale air to warm incoming fresh air, helping to further reduce heating demand and energy consumption.
Both Kingspan TEK® Cladding Panels and Kingspan TEK® Building System panels are now available in a 172 mm thickness, delivering U-values of 0.16 W/m².K or better, without the need for additional insulation. The manufacturing facility where the panels are produced carries both FSC® (FSC®-C109304) and PEFC Chain of Custody certification. As standard, the OSB/3 facing of Kingspan TEK® panels is PEFC certified at 70 per cent.