At Delaney Marling Partnership, we’re seeing a surge in enthusiasm for eco-improvements such as air source heat pumps (ASHPs) and solar photovoltaic (PV) panels. These innovative technologies offer tremendous potential to reduce energy costs, lower carbon emissions, and future-proof properties against volatile energy prices. When thoughtfully integrated into a building’s holistic performance strategy, they deliver enduring value and comfort for homeowners and businesses alike in East Yorkshire.
However, as a firm, we champion a measured approach – steering clients away from ‘eco-bling’: those superficial installations often spurred by tempting grants, subsidies, or a desire for green credentials.
Picture This
Putting a high-tech heat pump or solar array onto a draughty, poorly insulated structure is akin to fitting a Ferrari engine into a car with flat tyres and a leaky fuel tank.
The system labours inefficiently, electricity bills remain stubbornly high, and the promised return on investment evaporates.
Facts underscore this:
- UK government data reveals that up to 25% of domestic heat loss stems from uninsulated walls alone.
- Rushed renewables retrofits can see efficiency drop by 30-50% without fabric upgrades.
Superficial ‘greenwashing’ not only squanders capital but also undermines genuine sustainability goals.
Fabric First
At the heart of effective efficiency lies the ‘Fabric First’ principle, which Delaney Marling Partnership advocates passionately. This means prioritising airtightness and robust insulation in walls, roofs, and floors before bolting on renewables.
Hull and East Yorkshire Properties
Non-negotiable basics include a minimum 300mm thickness of wall insulation, dramatically curbing heat leakage. BRE (Building Research Establishment) research, “Solid wall heat losses and the potential for energy savings”, confirms that heat loss reductions accelerate sharply beyond 100-150mm for solid walls—common in Hull and East Yorkshire’s Victorian and interwar housing stock—while deeper layers amplify savings, especially amid rising energy costs.
Key Considerations
Practical, evidence-backed steps for success:
- Fabric First Fundamentals: Target UK Building Regulations U-values, such as 0.18 W/m²K for walls, achievable with 100-150mm rigid PIR or phenolic foam boards. Thicker applications (200-300mm+) in cavities or solid walls supercharge performance, retaining heat like a thermal fortress.
- Whole-Building Audits: ASHPs thrive in well-insulated envelopes—think 140-200mm roof insulation to secure COP (Coefficient of Performance) ratings above 3.0. Without this, systems guzzle electricity; thermal imaging audits reveal hidden leaks, ensuring renewables hum efficiently.
- Smart Retrofits for All: In commercial spaces, strategic layering—e.g., 270mm+ in pitched roofs or underfloor upgrades—avoids ‘box-ticking’ pitfalls. Pair this with mechanical ventilation with heat recovery (MVHR) for fresh air without warmth loss, turning older buildings into beacons of efficiency.
These strategies aren’t just theoretical; they align with Passivhaus standards and net-zero pathways, delivering payback periods as short as 5-7 years through lower bills and enhanced property values.
Delaney Marling’s Expert Advice
Kevin Marling, Chartered Building Surveyor at Delaney Marling Partnership, says: “True sustainability blooms from solid foundations, not shiny gimmicks. We always encourage homeowners and businesses to commission whole-building surveys to understand the fabric condition and materials used before attempting to calculate the benefits of heat pumps and solar PV. The dew point at which condensation arises must be calculated and addressed as part of any design of such installations – a whole house approach.”
Overall, sustainable buildings aren’t about headlines – they’re about legacy investments that pay dividends for decades.
For more information or to be pointed in the right direction, please contact Simon Delaney and Kevin Marling at info@delaneymarlingpartnership.co.uk
To arrange a survey on your property, please contact us at Delaney Marling Partnership. Please note that we have a six-week lead time, so it’s advisable to schedule your survey in advance rather than waiting until negotiations are underway.
At Delaney Marling Partnership, we help clients make smart, informed decisions through comprehensive surveys and expert advice – protecting your investment from costly compliance pitfalls.
(1) The 25% heat loss figure for uninsulated walls draws from longstanding UK industry benchmarks, such as the Building Research Establishment (BRE) reports and English Housing Survey data, which consistently highlight walls contributing 20-35% of total domestic heat loss in older, uninsulated homes prevalent in East Yorkshire.
(2)The 30-50% efficiency drop for heat pumps without fabric upgrades reflects real-world performance gaps noted in DESNZ guidance and Ofgem modeling, where poor insulation forces systems to underperform their rated Coefficient of Performance (COP).
(3) Solid wall heat losses and the potential for energy savings.
(4) Pasivhaus Standards.