Consultancy service

We now offer a comprehensive range of consultancy services for building professionals to help projects meet low energy building standards. Whether you are aiming for a low energy newbuild or retrofit or full Passivhaus certification, we have the experience and tools to get you there.

Peer review and support

We can offer ad hoc support and reviews of construction detailing and PHPP modelling for building professionals, starting from as little as an hour, to help you achieve your Passivhaus and low energy building project and it’s not as expensive as you might think!

Pricing examples

  • Bill Butcher can look at construction detailing and discuss over the ‘phone from £60/hour
  • Paul Smith can review PHPP/ Therm modelling from £35/hour

Technical expertise

Bill Butcher, Director, Green Building StoreOur team has gained unrivalled expertise in low energy building methodology, starting in 1992 with the Longwood Low energy house and recent pioneering Denby Dale and Golcar Passivhaus projects through to radical retrofit projects such as the multi award-winning Cre8 Barn EnerPHit project.

We have also been involved with a wide range of Passivhaus and low energy projects throughout the UK, offering consultancy, training and technical product support.

Design review

If you already have a preliminary design for your project, we can offer advice on how best to approach detailing of the thermal envelope. We offer design and detailing of thermal bridge free junctions, window and door installations and airtightness strategies. Our team are able to specifit the most economic materials and methods to optimise your project’s performance.

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Reducing thermal bridging "D Thermal Bridge Analysis

Reducing thermal bridging

Thermal bridges in highly insulated buildings contribute an additional heat loss from a building’s fabric of up to 30%. Let our team of experts design out any thermal bridges at the drawing board, using 2D Thermal Bridge Analysis.  We carry out detailed analysis, using specialist software, to ensure problematic junctions have minimal impact on thermal performance and safeguard against condensation and mould growth issues.

Avoiding moisture issues

Moisture build-up and interstitial condensation are a growing concern for retrofit and even newbuild projects. We now offer specialist WUFI hygrothermal modelling to offer you peace of mind that your project is going to achieve the standards you expect and ensure that the building fabric is not at risk  from moisture issues.

We are also able to advise on the most suitable building materials to avoid problems with moisture build-up, for example internal wall insulation for retrofit projects.

Wufi hygrothermal modelling
Denby Dale Passivhaus PHPP

Passivhaus Planning Package (PHPP)

Let us be your Passivhaus consultant! Our PHPP service is idea for architectural practices that do not currently have in-house Passivhaus low energy expertise. PHPP helps us assess the impact of your design choices before a single brick is laid. PHPP is some of the most robust building software available, allowing our experts to help you design buildings offering exceptional levels of comfort and energy savings.

The PHPP software helps us model your project to meet the requirements for certification to the exacting Passivhaus and EnerPHit standards.

Meet the team

In addition to our practical building experience, we have extensive technical knowledge with in-house Passivhaus certified Designers and Consultants. We use our in-depth knowledge of the exemplar Passivhaus methodology to help deliver the best performance to any level of build.

We work with a wide network of individuals and institutions, with a broad range of knowledge and skill sets, to ensure we can cover all aspects of any project.

Paul Smith: ACIOB, Senior Construction Technician, Certified Passivhaus Consultant, Green Building Store

Paul Smith:
Senior Construction Technician, ACIOB

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Anna Marie Byrne, MVHR Designer and Certified Passivhaus Designer, Green Building Store

Anna Marie Byrne:
MVHR Design Engineer,       B.Arch

Certified Passivhaus designer logo
Bill Butcher, Director, Green Building Store

Bill Butcher:
Director & Project Leader, BSc, ICIOB

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Get in touch!

To arrange a quotation for your low energy building project, please complete the contact form below:





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