- Building Type : Collective housing < 50m
- Construction Year : 2019
- Delivery year : 2020
- Address 1 - street : 89 King Street NR30 2PR GREAT YARMOUTH, United Kingdom
- Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
- Net Floor Area : 460 m2
- Construction/refurbishment cost : 579 750 €
- Cost/m2 : 1260.33 €/m2
Primary energy need :
(Calculation method : Other )
Using our latest innovation in our TCosy retrofit system, Beattie Passive has breathed new life into a 1950s block of flats in Great Yarmouth. By constructing a new super insulated layer around the whole property, eliminating thermal bridges, and installing Heat Recovery Ventilation, we have brought this old inefficient building up to EnerPHit standard - the Passivhaus standard for retrofit. Residents faced limited disturbance, were able to remain at home throughout and are now enjoying much lower energy bills. The building is currently undergoing a performance monitoring period, but we know that we have achieved an excellent airtightness result of 0.67 air changes per hour and a permeability of 0.918 at 50 Pa. We anticipate an 80% reduction in heating demands, greatly decreasing the Carbon footprint of the building, and helping to lift residents out of fuel poverty.
One of the most significant developments of this project was that it proved as a proof of concept of our latest TCosy retrofit system, meaning we now have a highly adaptable and flexible system that can easily retrofit any building in the world to the EnerPHit standard, providing a very real opportunity to easily and affordibly lift the performance of homes across the world and vastly reduce space heating demand and hence energy usage and carbon emissions.
See more details about this projecthttps://beattiepassiveblog.wordpress.com/category/great-yarmouth-retrofit/
3rd part certified
Environmental consultancyEnhabit Ltd Sarah Price, norwich[a]enhabit.uk.com, Norwich
OthersOxford Brookes University Rajat Gupta, rgupta[a]brookes.ac.uk
Owner approach of sustainability
This retrofit was carried out on a 1950's style terraced block of of flats in order to lift the thermal performance of the building, reduce its environmental impact and improve the lives of its residents.
The Beattie Passive build system builds to Passivhaus as standard, and so our goal with this retrofit from the outset was to reach the EnerPHit standard, which we achieved. We have greatly improved the thermal and energy performance of the building, and greatly improved the quality of life for residents. We anticipate the space heating demand to be reduced by up to 80%, reducing the Carbon footprint and saving residents money on their fuel bills. The mould and condensation problems that the property used to face have now also been eliminated, and residents enjoy cleaner air and healthier, more comfortable homes thanks to the Mechanical Ventilation and Heat Recovery.
We have delivered over 400 Passivhaus standard homes across the UK, and this is our 4th large scale Passive retrofit, however the difference with this project is that we were testing a new bracketed system, that if successful could be adapted to fit any building in the world, and with the successful completion of this project in Great Yarmouth, we now have a proven, highly adaptable system that can transform any building in the world into a high performing, Passivhaus standard building.
Often, the design of retrofitted properties are inkeeping with the local surrouding but dont act as a vision of the future - We wanted to create something modern ; high performing and visually stunning that stands out within its environment, to show what could be achieved by doing a deep retrofit to passive standard.
If you had to do it again?
The fire barrier that we used wasn't particularly easy to install, so going forward we will use an alternative e.g. Rockwall Flexi
Building users opinion
Residents have commented on how much warmer their homes are now, and how much less they use their heating systems, with one resident even being contacted by their energy supplier to enquire about their lower energy use. Residents also note that they no longer experience condensation in their homes and no longer need to use dehumidifiers to remove excess moisture. Additionally, they report that the difference in sound between their homes pre- and post-retrofit is marked and there is now much less noise pollution from the outside in their homes.
- 123,60 kWhpe/m2.year
- 221,40 kWhpe/m2.year
- 221,40 kWhpe/m2.year
Indoor Air quality
Health & Comfort
Beattie Passive, enquiries[a]beattiepassive.com, 01953 687332
Structural work / Passive system
Beattie Passive’s TCosyTM is an innovative, whole building approach to large-scale retrofit. It provides a fast, low cost and highly replicable solution for a wide range of buildings. The TCosyTM dramatically reduces energy requirements, creates a healthier living environment and can be delivered whilst residents remain in their homes.Key Benefits of TCosy Retrofit:• Dramatically improve the energy efficiency – up to 75% reduction in heating requirement• A completely new external façade• Increase the value of the property• Resident stays in their home during the Retrofit• A healthier, warmer living environmentUsing our new bracketed approach, we can construct a whole new Structural Thermal Envelope that will reach the EnerPHit standard around any existing property, ensuring that the end result performs highly no matter the building you start with. This particular project is still undergoing performance monitoring until September, but previous TCosy projects have delivered up to 84% reduction in energy bills and an estimated 4 tonnes of CO2 savings annually. We offer TCosy retrofit at approximately £600 per square meter of external surface area.
The King Street retrofit project is situated within a sub-urban neighbourhood of Great Yarmouth, on a relatively quiet two-lane road. There are a few commercial businesses operating along the road, with various parks and recreational spaces within easy walking distance. There are three primary schools in the immediate vicinity, and various dentists/opticians a few minutes walk up the road. A bus stop and a National Express Coach stop are also nearby.
New, super insulated layer built using a thermal-bridge free design and Passivhaus standard windows and doors now encompasses the entire building. We anticipate an 80% reduction in space heating demand as a result, and a corresponding reduction in energy usage. One resident has even reported that their energy supplier has been in touch to enquire about the much lower energy use.
Before the retrofit, each flat has large amounts of mould and damp, with one flat having to use dehumidifiers to clear away residue on their windows each morning, and this has been overcome by the retrofit.
The super insulated, airtight layer also eliminates noise, what used to be considered a noisy estate can now barely be heard from within the building.
Excellent airtightness - 0.67 air changes, n50, and 0.918 permeability at 50 Pa (m3/h/m2).
Residents endured minimal disruption as they were able to remain at home for the complete duration of the works.
Mechanical Ventilation with Heat Recovery has been installed into each flat, preventing loss of heat, and providing a constant stream of fresh air into the property, filtered before it enters the flat to remove pollen, dust and other pollutants. Damp and dust is also efficiently removed by the MVHR, eliminating indoor mould and condensation. This all results in a much more comfortable, healthier environment for residents.