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Barrel vaulted roof and apse during restoration


According to Icynene, air leakage is responsible for up to 40% of a buildings heat loss and the system’s ability to close off small structural gaps and service holes, creating a ‘sealed box’ environment, makes it one of the most efficient and cost-effective means of heat-loss mitigation in a building. In this instance, the roof void above, including the original roof timbers, remained naturally ventilated.


Icynene also points out that, unlike urethane foams of 20 years ago, modern spray foams like Foamlite use water as the blowing agent. The reaction between the chemical components produces CO2 which causes the foam to expand. As the foam expands the cells burst and the CO2 is replaced by air.


As a result, Foamlite has a global warming potential (GWP) of 1 (One) and an ozone depletion potential (ODP) of 0 (Zero). Furthermore, Icynene does not emit any harmful gasses once cured and is completely inert.


RESTRICTED WORKSPACE WITH DIFFICULT ACCESS


Access to the ceiling vault was one of the most difficult challenges to the insulation process, explained Matt Lawford. “We were on a very near vertical incline at the sides of the dome and had to manoeuvre across the timber roof joists, in difficult tight spaces, taking extreme care not to damage the ceiling of the church below. The workspace on the sides was only a few feet wide in places but it opened-up a little as we climbed up onto the arch.”


The Icynene LDC 50 insulation foam was sprayed to a thickness of 100-200mm directly on to the back of the ceiling structure. Green Horizon’s objective was to create a minimum blanket of 100mm over the entire ceiling back - roughly 450 square metres, with additional depth used to fill areas where adjoining arch planes met. Installation of the Icynene insulation was completed over a seven-day period.


THE RIGHT MATERIAL IN THE RIGHT PLACE


Commenting on the insulation of the Church, Roddie MacLean added, “We looked at a variety of different options for what to use and where to insulate but Icynene emerged as the ideal answer. It was the right material in the right place.”


For more information on Icynene Spray Applied Insulation products: www.icynene.co.uk


See also YouTube video: https://www.youtube.com/watch?v=gnuhEQLV6_I


ICYNENE


TEL: 07851 854860 9


Access to the void between the roof and ceiling to the worship area was difficult for the Green Horizon, Icynene Contractors


WWW.ICYNENE.CO.UK


Domed roof to the semi-circular apse


A 200mm thick blanket of Icynene LDC 50 foam was sprayed to the back of the ceiling


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