Building Performance
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Design
Book a subsidised Home Energy Rating Assesment
Better-performing homes start with better information and better design.
Mantle helps homeowners, designers and builders create homes that are more comfortable, energy efficient and better suited to their climate.
We combine building-performance assessment, NatHERS modelling, retrofit advice and sustainable residential design to understand how homes perform — and how they can perform better.
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What would you like to do?
Whether you're assessing the home you live in, planning a renovation or starting with a new design, Mantle can help you make better-informed decisions.
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EXISTING HOMES — Understand your home.
Find out how your home performs, what is affecting its comfort and energy efficiency, and which improvements are worth prioritising.
Home Energy Ratings · Performance Assessments · Retrofit Roadmaps
Explore Existing Homes →
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NEW HOMES — Optimise before you build.
NatHERS assessment, BASIX and performance optimisation to help achieve compliance while creating a more comfortable and efficient home.
NatHERS · BASIX · Design Optimisation
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RETROFIT & RENOVATION — Improve your home intelligently.
Planning improvements or renovation? We help identify, model and develop upgrades so performance decisions can be made before construction begins.
Performance Advice · Upgrade Modelling · Renovation Support
Explore Retrofit & Renovation →
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SUSTAINABLE DESIGN — Design for better performance.
Residential design informed by climate, orientation, passive-design principles and building-performance modelling.
New Homes · Alterations & Additions · Performance-Led Design
Explore Sustainable Design →
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Performance and design should work together
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A better-performing home isn't created by one product or technology. Insulation, glazing, orientation, shading, air movement, thermal mass, heating and cooling systems, renewable energy and the way a home is designed all interact.
Mantle brings building-performance analysis and design thinking together so decisions can be based on how the whole home performs.
ASSESS → ADVISE → MODEL → DESIGN → VERIFY
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Understand your existing home
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Before spending money on upgrades, understand what your home actually needs.
If your home is too cold in winter, overheats in summer, feels draughty or uses more energy than expected, a Home Energy Rating can provide a clearer picture of its performance.
Home Energy Rating
Home Performance Assessment
Retrofit Roadmap
​​Compare Existing Homes Services
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Eligible NSW homeowners may currently receive a $330 NSW Government contribution towards a subsidised Home Energy Rating. Eligibility, availability, program pricing and booking requirements apply.
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Book a subsidised Home Energy Rating Assesment
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Better decisions before construction
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Performance decisions made early are usually easier and more economical than trying to correct problems after construction.
Mantle can work with homeowners, designers and builders to assess design options, model thermal performance and identify opportunities to improve comfort and efficiency before they become expensive changes on site.
[New Homes →] [Retrofit & Renovation →]
Performance-led residential design
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Good residential design responds to more than floor area and appearance. Climate, orientation, solar access, shading, glazing, ventilation and building fabric influence how a home feels every day.
Mantle integrates these considerations into residential design for new homes, alterations and additions, helping create spaces that are practical, comfortable and responsive to their environment.
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[Explore Sustainable Design →]
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Why Mantle?
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Building Performance + Design
Rather than separating energy assessment from building and design decisions,
Mantle connects them.
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Accredited assessment
NatHERS expertise for both existing and new homes, supported by
recognised assessment methodologies.
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Practical building knowledge
Recommendations consider not only modelled performance but also constructability, sequencing, cost implications and future renovation plans.
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Independent advice
Our starting point is understanding the building and identifying what matters — not selling a particular product or technology.
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Local expertise
Based in the Jervis Bay / Shoalhaven region, Mantle provides services across the NSW South Coast and supports projects further afield where appropriate.
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Our approach
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01 — UNDERSTAND — We start with the home, the climate and what you're trying to achieve.
02 — ASSESS — We investigate existing conditions or analyse the proposed design.
03 — MODEL — Where appropriate, we use NatHERS and building-performance modelling to test how the home performs.
04 — PRIORITISE — We identify the changes likely to deliver the greatest practical benefit.
05 — IMPROVE — Where further support is required, Mantle can help develop the retrofit, renovation or design response.
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Not sure where to start?
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You don't need to know whether you need better insulation, different windows, more shading or a new heating system before contacting us. And you don't need to know whether you need NatHERS, retrofit modelling or design advice.
Tell us about your home or project.
We'll help identify the right place to start.
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[Tell Us About Your Project] [Contact Mantle]
I engaged Mantle in the early stages of our new project build to explore how we could achieve a more sustainable and energy efficient home.
Rodrigo was amazing to deal with an obvious amount of knowledge. I experienced fantastic communication despite numerous changes to take into account our budget as well as restrictions that we had with a project home.
Not only did the process educate me in being more efficient, but our home went from 4.8 stars to 7.8 stars which gives our family a comfortable cost effective home all year round.
I could not recommend Mantle more highly as a wise investment to ensure your home performs the best it can for years to come"
Dean Smith
Homeowner Project house,
Far South Coast.
We pay our respect to the First Nation people of Australia, Traditional Custodians of the Land where we live, work and play.
We extend this acknowledgement to all indigenous peoples of the world.