Business Description

Mark Siddall is an award winning architect and energy consultant specialising in low energy and PassivHaus design. He also provides consultancy, strategic analysis, troubleshooting and project enabling for clients, design teams and constructors. As an architect he has a keen interest in closing the energy performance theory/reality gap that is prevalent in the UK. By utilising an integrated design ethic he seeks to deliver cost effective low energy buildings. The quality assurance systems that underpin the PassivHaus Standard serve to inform aspects of his approach. He assists with the delivery of Certified PassivHaus Designer Courses, by the CarbonLite Programme and by the University of Strathclyde. He is also a technical advisor to the PassivHaus Trust.

3 Toll House Road
Crossgate Moor
Retrofit for the Future: Coach Road

scope: Mark was responsible for winning and overseeing the three projects funded by the RftF programme. Each of the house types were chosen because of their relevance at both a regional and national level. In each case the design adopted a fabric first methodology utilising the quality assurance tools and mechanisms associated with Passivhaus design. The intention was that the residents of the homes, health permitting, would remain in the properties during the refurbishment; in a number of cases this was achieved. The projects are undergoing a two year monitoring programme. Many RftF projects retrofitted just one home for the available capital. In the case of projects that Mark oversaw it was possible to refurbish two homes within the same budget. In order for this to be accomplished a highly integrative design strategy was adopted which enabled the maximum value to be derived from each chain of decisions.

aims: The Technology Strategy Board (TSB) funded the Retrofit for the Future (RftF) programme with the intention of refurbishing homes so that they may achieve an 80% reduction in carbon dioxide emissions. Considering that the UK government has a legally binding objective is to achieve an 80% reduction in carbon emissions by 2050. The significance of this work cannot be underestimated.

measures: Super insulation Minimisation of thermal bridging Airtightness Ventilation heat recovery Design Space Heating Demand: 39 (kWh/m2/a) Design Primary Energy Demand: 100 (kWh/m2/a)

monitoring: Pre-Retrofit Air Leakage: 11.9 (m3/h/m2 (@50p) Post Retrofit Air Leakage: 0.94 (m3/h/m2 (@50p)

Racecourse Passivhaus Estate

scope: This 28-unit bungalow scheme was built at the Racecourse Estate in Houghton-le-Spring, Tyne and Wear. As of January 2012 it was the largest residential PassivHaus scheme in the UK. As Project Architect and Passivhaus Designer Mark developed the project with the RSL Gentoo. Winner: Regional Constructing Excellence Award 2012: Innovation Regional LABC Building Excellence Award 2012: Best Large Housing Development Regional LABC Building Excellence Award 2012: Innovation Sunderland LABC Building Excellence Award 2012: Best Large Housing Development Note: This project was undertaken whilst working at Devereux Architects.

aims: The estimated fuel bill for the homes is just £64 per year. This may be compared to the data from the Energy Savings Trust which suggests that the average energy bill for space heating and hot water is between £588 and £882 per year. On this basis the homes achieve a cost saving of £520 to £814 per annum. By helping to design and implement this project, and also by keeping a close eye on quality assurance, Mark has established himself as one of the UK’s leading low energy architects.

measures: It has been estimated that energy consumption and carbon emissions of the Passivhaus homes will be over 80% less than that of the national average building stock. The design achieves a 75% reduction in space heating compared to Building Regulations and gains a rating of Level 4 under the Code for Sustainable Homes (CSH) without the need for bolt-on technologies. With the addition of solar thermal panels (for hot water) and photovoltaic panels (for electricity) CSH Level 5 is achieved.

monitoring: As of mid 2012 independent co-heating tests, undertaken by Leeds Metropolitan University, have successfully demonstrated that the thermal performance of the homes is such that they have closed the performance gap (90% of the other buildings that they have examined over 20 years of research have failed to achieve this goal).