thermal bridge calculations

Construction Performance

Fabrica Architects strive for excellent thermal performance in the design of our projects and through consultancy services to contractors, clients and design professionals on building performance and regulatory requirements.


As TGD Part L, 2011 Building Regulations has increased elemental thermal performance and reductions in C02 emissions, heat loss due to thermal bridges has become increasingly important to quantify for use in DEAP in Ireland and SAP, SBEM in the United Kingdom.

Studies have shown that inadequate detailing at junctions can result in significant heat loss through the building and reduce U-Values to a level below the requirements of the building regulations, thereby impacting on certification under BC(A)R 2014.

Fabrica Architects have completed the postgraduate certificate in thermal performance modelling from DIT, Bolton Street in 2014. This course is approved by the NSAI (Ireland's official standards body) and allows successful graduates to register with the NSAI to provide certified construction details for the purpose of compliance with Clause (ii) TGD Part L

All calculations are carried out to the following: BR497 convention, BR443, ISO 10211, ISO 6946 & ISO 13370 using Psi-Therm software


Fabrica Architects offer a consultancy service for design professionals, contractors and home-owners in the design and compliance calculations required for Part L and BC(A)R 2014 certification. There are a range of services depending on the complexity of the project and can be tailored to suit each design.
  •   Calculation of building element U-Values to IS EN ISO 6946 & ISO 13370
  •   Calculation of window & door U-Values to DIN EN 10077-1
  •   Preparation of preliminary DEAP compliance calculations and report
  •   2d heat flow analysis to determine linear thermal bridge calculations to ISO 10211
  •   Surface condensation risk and temperature calculations
  •   Prelimindary calculations for low temp UFH, including fabric heat loss, ventilation heat loss and design heat loss
  •   Calculations of window/floor ratios for Part L 2011 Compliance
  •   Renewable technologies advice and compliance calculations
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thermal modelling, BCAR, building regulations, part L, fabrica architects, ireland, DEAP
BCAR, fabrica architects, thermal modelling, nsai, ireland


Fabrica Architects Ltd.
Holfeld House, 2 - 4 Merville Road, Stillorgan,
Co.Dublin, Ireland, A94 E3F8

Company No: 529037 | Vat No: IE 3275485TH


Tel. +353-1-5168480

Members of the Royal Institute of Architects of Ireland

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