SAP calculations
Clear guidance on energy performance and Part L compliance, from design-stage assessments to as-built calculations.
- New-build homes
- Design & as-built SAP
- Practical specification advice
Energy expertise. Made personal.
Better buildings.
Less complexity.
SAP, sorted.
From SAP calculations to thermal bridging, we make building energy compliance straightforward, so you can get on with your project.
Family-run. Practical advice. With you from the start.
Designed for a lower-energy future
Technical expertise.
A personal approach.
01 / What we do
Your project. Our expertise.
Building a new home, extending a space or refining a detail? Let’s find the right way forward.
The detail matters.
Project-specific PSI-value calculations to understand heat loss at junctions and support a better-performing building fabric.
- Junction modelling
- Heat-loss analysis
- Detail-led design support
More room. Less worry.
Energy calculations for extensions and renovations, helping you explore glazing and insulation without losing sight of your design.
- Highly glazed extensions
- Renovation projects
- Part L guidance
A clearer path to planning.
Energy and Carbon Statements and support with Places for Everyone requirements across Greater Manchester.
- Policies JP-S2 & JP-S3
- Energy statements & proformas
- Low-carbon design advice
Not sure what you need? Tell us what you’re working on and we’ll help you find the right starting point.
02 / A closer look
Small junctions.
Big considerations.
Where walls, roofs and floors meet, heat can find a way out. Thermal bridging calculations help you understand those losses, and make informed decisions about the details.
We model junctions to calculate PSI values for your SAP assessment, with clear visual outputs that help make the technical understandable.
Let’s look at your detailsShown: an illustrative eaves junction model, not a project performance guarantee.
Inside the detailEAVES / 2D ANALYSIS
Compare the model views
Use the comparison below to explore the materials and temperature side by side. These show the same junction, not a before-and-after improvement.
Go to comparison ↓Construction meets performance
One junction.
Two ways to see it.
Compare the construction layers with the temperature distribution in the same eaves detail.
Illustrative model views, not a before-and-after result. The colour scale belongs to the temperature image.
Compare model viewsEAVES / DETAIL 01
Drag across the image or use this slider. Arrow keys adjust the split; Home and End show a complete view.
Full materials view (new tab) ↗Full temperature view (new tab) ↗
Rooted in Sale.
Working nationwide.
Working nationwide.
03 / Meet MEC
A small team.
A personal investment
in your project.
We’re McGlashan Energy Consultants, a family-run energy consultancy based in Sale, Greater Manchester.
We work with homeowners, architects and developers across the North West and nationwide. Our role is simple: to turn complex energy requirements into practical next steps for your building.
Advice you can useClear explanations, not more jargon.
Support that joins the dotsFrom early design decisions to the final assessment.
Local knowledge / Greater Manchester
Places for Everyone.
A plan for your project.
Planning in Greater Manchester? We can help you navigate the energy and carbon requirements of Places for Everyone, including policies JP-S2 and JP-S3.
Discuss your planning requirementsFrom the planning submission to the as-built assessment, we can support:
- Energy and Carbon Statements
- Supporting energy proformas
- Low-carbon heat strategies
- Truly Affordable Net Zero (TANZ) requirements, where applicable
Requirements depend on your site, proposal and local authority. We’ll help identify what applies to your project.
04 / How we work
A straightforward way forward.
No need to have every answer before you get in touch. We’ll start with where you are.
- 01
Tell us the plan.
Share your project, its location and the stage you’re at. We’ll identify the information and assessments you need.
- 02
We work through the detail.
We’ll agree the scope and quote, review your drawings and specifications, and explain the options.
- 03
Move forward with clarity.
Receive your calculations and reports, with practical guidance on the next steps for your project.
When should I arrange SAP calculations?
As early in the design process as possible. A design-stage assessment can help you understand how insulation, glazing, heating and other choices affect compliance before construction starts. As-built calculations then reflect what was actually constructed.
What should I send for a quote?
Start with the project location, the type and number of dwellings, the service you need and your timescale. Tell us whether you have plans, sections and a proposed specification. You can email drawings directly to connect@mcglashan.co.uk.
Do I need bespoke PSI values?
It depends on the construction details and the assessment. Project-specific values can represent your junctions more accurately than default assumptions. We can review your details and advise whether bespoke thermal bridging calculations would be useful.
Do you only work in Greater Manchester?
No. We’re based in Sale and support projects across the North West and nationwide. Let us know the project location so we can discuss the relevant requirements.
What about changes to energy standards?
The assessment route depends on your project, location and applicable transitional arrangements. We can discuss the relevant SAP and Part L requirements, and how developments such as the Home Energy Model may affect your plans.
05 / Let’s get started
Your next project.
Let’s talk.
A single home or a wider development. An early idea or a detail to resolve. Tell us what you’re working on and we’ll take it from there.
connect@mcglashan.co.uk Sale, Greater Manchester
Supporting projects across the UK
Have drawings ready?
Email them to us with your project location and any key deadlines. No need to upload them here.