Therefore we approach each project with a view to maximising the possibilities for environmentally-considered design, which is essentially just ‘good design’. This approach need not necessarily make designs more expensive, and in fact often saves them money in the longterm, but has the power to inspire, inform and make genuine improvements to our environment and quality of life.
This means we seek ways to limit any potentially negative environmental impact that our designs may have in terms of carbon emissions, pollution, resources, waste or ecology. But at the same time actively exploring opportunities for them to have a positive impact; through re-use, regeneration, using sustainable forms of energy and promoting community, wellbeing, sustainable travel, biodiversity, beauty and delight.
Whether designing at community scale, for a workplace or a home, we approach sustainable design in the same way:
A holistic approach that considers wider opportunities and linkages, sometimes outside of a project’s brief or the site boundary.
Where possible we strive to involve the building occupants or communities who will live, work or use the places that we create in the design process.
There are many advantages for replication and uniformity in terms of efficiency, quality and cost but we recognise that no two places or communities are the same. We design to be site-and-brief-responsive rather than follow a ‘one size fits all’ approach.
Early consideration of the most appropriate orientation, density, building form and layout to exploit opportunities for passive heating, cooling and lighting. We use environmental modelling software Sefaira to test our designs.
Optimising design to reduce heat loss and waste and promote energy efficiency before the application of renewables or expensive add-ons.
Putting people at the heart of the design to create environments that are comfortable, controllable and life-enriching.
Passivhaus is a tried and tested design principle based on the core ethos of achieving a healthy, comfortable and stable environment for end users driven through the control of air quality.
The concept focuses on reducing the requirement of energy use in the first instance, rather than the generation of a higher energy demand through renewables. It is a robust and effective way to achieve the challenge of carbon reduction for the built environment sector.
Passivhaus is an exacting quality assurance process giving the client confidence in the built performance from an early stage. The closely monitored design and build process ensures reduced heat loss through the building fabric, resulting in greatly reduced space heating demand throughout the year.
Stride Treglown have in-house Certified European Passivhaus Consultants/Designers providing expertise in designing to Passivhaus standards. The service provides guidance, advise and assessment for all types of buildings for both principle and certification standard.
Assessment and evaluation services we provide include:
- BREEAM Assessments*
– New Construction
– Non-Domestic Refurbishment
– Domestic Refurbishment
- Code for Sustainable Homes
- DREAM Assessments*
- Ska Rating – for fit outs and refurbishment projects
- Post Occupancy Evaluation
Whilst it is no longer possible to register new projects under Code for Sustainable Homes, we continue to offer our services to complete legacy assessments where a registration has already been secured. We expect to offer Home Quality Mark (HQM) assessments from Spring/Summer 2016.
* Building Research Establishment’s Environmental Assessment Method * Defence Related Environmental Assessment Method
Passivhaus Planning Package (PHPP) Assessment
Passivhaus Planning Package is a proven tool used to assess the energy efficiency of a building through the conventions of the Passivhaus principles. Stride Treglown can review a building at design stage, pre or post planning in order to measure the building for potential Passivhaus certification. All types of building can be assessed through PHPP from private housing to schools and commercial premises. The PHPP process will identify the heating and cooling demand per year as well as the renewable energy demands and gains which can provide the client with a good estimate of annual running costs. As part of the Passivhaus services offered, design stage thermal modelling can be incorporated to ensure low thermal bridging values and reduce the performance gap seen in more traditional build types.
Stride Treglown offers an assessment report post PHPP which provides both the results of the assessment and suggestion for improvement or alternative routes to achieve certification standard. PHPP can also be used to assess a building to AECB Carbonlite Silver Standard which has a relaxed standard to the full Passivhaus Certification.
Standard Assessment Procedure (SAP) and EPC, Residential
Standard Assessment Procedure are calculations undertaken through the government approved modelling software which measures the energy efficiency of buildings in compliance with Part L1A Building Regulations. Stride Treglown undertake SAP calculation for small or large scale new build residential developments providing SAP reports for both design stage and final completion, including generation of EPC certification to satisfy Building Control. Stride Treglown can produce all auxiliary information required for SAP assessment including U-value calculations, thermal modelling if necessary and technical advice on performance improvement.
Thermal Bridging Analysis
Considering thermal bridges are an important part of sustainable design. Heat lost through poorly designed bridges can make a significant difference to the overall efficiency of the building. There are two types of thermal bridging, construction thermal bridging where materials with high conductivity penetrate the insulation layer, and geometric thermal bridges, where the insulation changes in direction or thickness.
Thermal bridge analysis calculates the heat lost in addition to the normal thermal transmittance value of the element. By calculating the thermal bridges it not only provides a greater accuracy in calculating the in-use energy of a building, helping to close the energy performance gap, but also provides a base to improve detailing by identifying the worst performing junctions.
Both SAP and Passivhaus require thermal bridge calculations. Stride Treglown offer both 2D and 3D thermal bridge analysis providing psi (Ѱ) values for use in the overall energy efficiency assessment of a building.