Field Notes

Practical guides on energy compliance, building performance and net zero for construction professionals and homeowners.

Two British houses showing different energy performance

Gabriel Varaljay · 18 Jun 2026

RdSAP 10 and Your EPC Score: What is Actually Changing in 2026

RdSAP 10 is replacing the methodology behind every domestic EPC. Here is what is changing and what it means for your rating.

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1930s semi-detached house

Gabriel Varaljay · 17 Jun 2026

EPC Ratings for 1930s and 1950s Semis: What to Expect and How to Improve

What EPC rating does a typical 1930s or 1950s semi achieve, and what are the realistic routes to improving it?

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Victorian red-brick terraced house

Gabriel Varaljay · 16 Jun 2026

F and G Rated Rental Properties: Your Options Before the Ban Bites

Own a rental property rated F or G? Letting it is already illegal unless you have a registered exemption. Here are your realistic options.

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Laptop screen showing EPC register energy chart

Gabriel Varaljay · 15 Jun 2026

How to Check If Your Rental Property Has a Valid EPC

Step-by-step guide to checking whether your rental property has a valid EPC, what happens if it has expired, and how to get a new one fast.

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Loft insulation between wooden joists in a UK property

Sara Waitz · 8 Jun 2026

Loft Conversion and EPC: What Energy Assessors Actually Look For

How a loft conversion changes your EPC, what evidence assessors need, and the documentation mistakes that cost points.

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Smart thermostat on wall showing temperature controls

Gabriel Varaljay · 7 Jun 2026

Smart Heating Controls: Do They Actually Save You Money?

Smart thermostats, TRVs, zoning strategies, and real-world savings data. When smart controls make sense and when they don't.

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Damp patches on cavity wall insulation in UK home

Gabriel Varaljay · 6 Jun 2026

Cavity Wall Insulation Problems: When the Fix Becomes the Problem

Damp issues from poorly installed CWI, extraction costs, CIGA guarantee claims, and when cavity wall insulation works well vs when it fails.

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Heat pump unit and gas boiler side by side comparison

Gabriel Varaljay · 5 Jun 2026

Heat Pumps vs Gas Boilers: Cutting Through the Noise

An honest comparison of heat pumps and gas boilers for UK homes. Running costs, installation, grants, and which one makes sense for your property.

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Rooftop with solar panels on a UK home

Gabriel Varaljay · 3 Jun 2026

My House Is C-Rated But I Added Solar - Do I Need a New EPC?

Added solar panels since your last EPC? Your rating is probably out of date. Here is exactly what to do to get your new score on paper.

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Modern UK construction site with energy-efficient building

Gabriel Varaljay · 2 Jun 2026

MEES Compliance for New Builds: A Practical Guide

How to meet Minimum Energy Efficiency Standards for new building projects without blowing the budget.

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UK terraced houses with energy efficiency overlay

Gabriel Varaljay · 29 May 2026

House Hunting With an Energy Filter

How to read EPCs, spot energy red flags in listing photos, and avoid buying the most expensive house to run on the street.

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MVHR ventilation unit installed in a UK retrofit property

Gabriel Varaljay · 28 May 2026

MVHR Ventilation Strategy for UK Retrofits

When MVHR makes sense in UK retrofits, installation considerations, running costs, and common mistakes to avoid.

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Energy assessor inspecting UK terraced house exterior with thermal imaging camera

Sara Waitz · 28 May 2026

Whole House Retrofit Assessment: Your Practical Guide to PAS 2035

What a PAS 2035 retrofit assessment involves, who needs one, realistic costs, and why skipping it is a costly mistake.

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Condensation water droplets on a cold window with mould on windowsill

Gabriel Varaljay · 27 May 2026

Condensation, Damp and Mould After Retrofit: What Went Wrong

Why some UK homes develop worse damp after energy upgrades - the ventilation gap, sealed houses, and vapour barriers in the wrong place.

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Close-up of a typical white uPVC outward-opening casement window on a British brick house showing weathered seals

Gabriel Varaljay · 27 May 2026

The Window Problem Nobody Talks About

Outward-opening windows, failing hinges, and terrible seals. Why UK homes lose so much heat around their windows.

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Rural Hertfordshire farmland near Aston End with hedgerows under an English sky

Gabriel Varaljay · 26 May 2026

The Solar Farm Protest I Walk Past Every Day

A small solar installation near Aston End sparked seven objections. I read the planning documents. Here is what I found.

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Modern air source heat pump installed beside a British home with solar panels on the roof

Gabriel Varaljay · 25 May 2026

Heat Pumps: What the Tabloids Won't Tell You

The media ran a scare campaign against heat pumps. Here's what actually happens when you install one and why gas is on borrowed time.

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Thermal imaging survey of a building showing heat loss patterns

Sara Waitz · 24 May 2026

Thermal Imaging Building Survey Guide

What thermal imaging reveals about heat loss in UK buildings - cost, timing, limitations and best practice.

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Solar panels installed on a traditional British semi-detached house with red brick walls under an overcast UK sky

Gabriel Varaljay · 23 May 2026

Solar Panels in the UK: The Honest Numbers

Real payback periods, actual generation figures, and honest battery storage economics. No sales pitch, just verified numbers.

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Digital manometer during airtightness test

Gabriel Varaljay · 22 May 2026

Blower Door Testing: A Practical Guide for UK Builders

Part L requirements, common fail points, when to schedule testing and how to get airtightness right from the start.

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UK terraced house with external wall insulation being installed

Gabriel Varaljay · 21 May 2026

Optimising Building Insulation for UK Projects

Material selection, installation pitfalls and how to verify performance. A practical guide for builders and contractors working on UK projects.

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Blower door test fan in a UK house doorway

Sara Waitz · 20 May 2026

Understanding Blower Door Tests

How airtightness testing works, what the results mean and why it matters for Part L compliance on new builds and retrofits.

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British terraced houses with energy rating labels

Sara Waitz · 19 May 2026

MEES 2030 Landlord Guide

The Minimum Energy Efficiency Standard is tightening. What the proposed EPC C requirement means for your rental portfolio and what to do now.

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UK energy assessor holding an EPC certificate

Sara Waitz · 18 May 2026

EPC Guide for UK Landlords 2026

Important changes and requirements for rental properties. What every landlord needs to know about EPC ratings, MEES thresholds and penalties.

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