Maureen O'Sullivan (Dublin Central, Independent)
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166. To ask the Minister for Environment, Community and Local Government further to Parliamentary Question No. 788 of 15 April 2015, if his reference to BR 443 (2006) Conventions for U-value Calculations supersedes the requirement to apply IS hEN ISO 13788 (2012) when calculating surface temperature factors for opaque elements; and if this now constitutes a countermanding national standard which designers of Irish buildings are required to apply in preference to the harmonised European standard published by the National Standards Authority of Ireland on 3 December 2013. [15980/15]

Maureen O'Sullivan (Dublin Central, Independent)
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167. To ask the Minister for Environment, Community and Local Government further to Parliamentary Question No. 788 of 15 April 2015, if he will confirm the date on which the requirements of IS hEN ISO 13788 (2012) to use a surface resistance of 0.25 m2W/K was revised to a surface resistance of 0.10 or 0.13 or 0.17 m2W/K as listed on page seven of BR 443 (2006 Edition) Conventions for U-value Calculations when calculating surface temperature factors (fRsi) for Irish dwellings. [15981/15]

Maureen O'Sullivan (Dublin Central, Independent)
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168. To ask the Minister for Environment, Community and Local Government further to Parliamentary Question No. 788 of 15 April 2015, wherein he advised designers of buildings to set aside the requirement to use a surface resistance of 0.25 m2W/K in accordance with IS hEN ISO 13788 (2012) and apply instead the surface resistances of 0.10 or 0.13 or 0.17 m2W/K in accordance with BR 443 (2006 Edition) Conventions for U-value Calculations when calculating surface temperature factors (fRsi) applies equally to dwellings and non-residential buildings here; and if the activation date for this change is the same for residential buildings covered by Part L 2011 and non-residential buildings covered by Part L 2008, of the Irish building regulations. [15982/15]

Paudie Coffey (Waterford, Fine Gael)
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I propose to take Questions Nos. 166 to 168, inclusive, together.

I refer to the reply to Question No. 788 of 15 April 2015 which addressed the approach to calculating the temperature factor in the vicinity of thermal bridges at junctions and around openings in accordance with Appendix D of Technical Guidance Document L 2011. The surface resistance values given in IS EN ISO 13788 are consistent with those given in the Building Research Establishment Report BR 443 Conventions for U-Value calculations (2006 edition) for such details. A surface resistance value of 0.25 is only used in very specific situations as outlined in section 4.4 of the EN ISO 13788 standard which is of rather limited relevance in this context and, for that reason, it has not been referenced at Appendix D of TGD L 2011 or referred to in the reply to Question No. 788 of 15 April 2015. I.S. EN ISO 13788 is referenced elsewhere in TGD L 2011 - in relation to Appendix B, which provides additional guidance on fabric insulation for common constructions, in particular - and it may be relied upon to the extent to which it has relevance to the matters raised in TGD L. My Department is willing to assist further in relation to this matter by way of correspondence or meeting as appropriate.  A dedicated email account - – is in place to facilitate such requests.