ONLINE MASTERCLASS
Stop overheating in summer & dreading winter
Don’t risk wasting money on piecemeal fixes. Learn how to transform your house into a cool, healthy, energy-efficient home all year round.
Thursday 10 September, 12:30pm (BST)
Presented by Paul Testa, Director at HEM Architects and building performance expert.
Does your home work against you?
If you just spent these summer months finding it difficult to sleep in a house that’s felt more like a greenhouse than a cool, comfortable home — you aren’t alone.
And now, as summer fades, a new problem comes along, increased winter energy bills.
If you have a gas boiler or an oil-based heating system, you can feel stuck with rising energy prices and draughty rooms mean that you’re spending too much of your money keeping you and your family warm.
Your first instinct might be to buy air conditioning or jump straight into buying solar panels, insulation, or a heat pump.
But you need a plan first, and whole house retrofit can give you this.
The risk of renovation paralysis.
Calling individual contractors without a master plan is a financial gamble:
- Installing insulation in the wrong order traps moisture, leading to toxic mould and structural damage.
- New air conditioning in a poorly airtight building doesn’t get to the root cause.
- Upgrading heating equipment before fixing heat loss means you’re paying to heat your street.
To make your home beautifully cool in summer, effortlessly warm in winter, and cheap to run all year, a retrofit plan will look at how your whole house functions.
The solution? A whole house retrofit plan.
‘Retrofit’ means upgrading your existing home so it retains heat in winter, resists excess heat in summer, uses significantly less energy, and stays healthy year-round.
Instead of buying piecemeal fixes, a Whole-House Retrofit Strategy treats your roof, walls, windows, and heating as a single, living system.
It ensures every upgrade is done in the right order, tailored to your budget, so you never waste a single penny.

What you’ll learn in this live masterclass:
In this 60-minute live session with Q&A, Paul Testa will help you create a better home.
Key takeaways:
- Year-round warmth & comfort: How to eliminate cold spots and damp so your home stays a constant, cosy temperature.
- Draught-free plan: How retrofit and Passivhaus principles can keep your home cool and reduce cold draughts in your home.
- Summer heatwave protection: Practical design choices to keep your living spaces naturally cool and comfortable during hot summer months.
- Winter comfort: Quick wins to make your home feel warmer in the winter and reduce energy bills.
- Realistic costs and budgeting: Insight into real refurbishment costs, moving off oil or gas, and ensuring return on your investment.
- Avoid builder nightmares: How to protect your budget, manage contractor risk, and ensure your finished home delivers predicted energy performance.
- Special offers for everyone who registers: We will share a very special offer from HEM Architects if you register for the webinar.
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Register now
We’re on a mission to help everyone live in beautiful, practical homes that have minimal impact on our planet.
Thursday 10 September, 12:30pm (BST)
Spaces are strictly limited to ensure an interactive Q&A. Can’t make it live? Register anyway and we’ll send you the replay link.