The Passivhaus Trust is calling for Scottish Government to stick to its commitment for a Scottish Passivhaus Equivalent Policy for all new build homes, in light of the fact that ministers recently scrapped their target to cut carbon emissions by 75% by 2030.
Scottish Government had previously said it would pass subordinate legislation to introduce a new minimum environmental design standards for new housing. This will create a national Scottish equivalent to the Passivhaus standard for all new builds, which, the Passivhaus Trust states, would cut heating demand in new homes by 79%.
The Passivhaus Trust call to government comes in light of pressure from mainstream house builders who are calling for a review of the plans.
Data for 2023 showed that completions across all sectors fell by 11% in 2023 in Scotland, while starts fell by 24%, figures that indicate the size of the crisis.
The Passivhaus Trust maintains that improving energy efficiency standards will not adversely affect housing delivery, but will dramatically improve the quality of the homes delivered. It estimates that building to Passivhaus will create additional initial costs of between 4-8%, which will come down with economies of scale.
However, it does conceded that the new build market is operating in difficult conditions, and is consequently proposing a transition period for the new policy to come into force.
Passivhaus is an international energy performance standard based around reducing the requirement for space heating and cooling of new homes. Collectively, buildings contribute 35% of total global energy consumuption, and Passivhaus is a solution for this.
Adopting a Passivhaus approach means a fabric-first solution that plans for your homes build fabric and energy usage – something that many self builders adopt. Not everyone building to these principles opts to have their home approved as meeting the Passivhaus Standard – find out more on the Passivhaus Trust’s website about what this means for you on your project.
Words & Image: Duncan Hayes
After 30 years of trading as Green Building Store, the building products supplier and high-performance homes specialist has rebranded itself as 21°. The new name reflects 21°’s vision to support customers to create life changing homes that are healthy and comfortable, secured by optimising energy performance.
21°’s supports self builders by advising and supplying a range of products and services to help make their build as airtight as possible, such as by incorporating triple glazing and MVHR.
By concentrating on airtightness, the home benefits from fewer draughts and air that’s free from outdoor pollutants. This enables the home to maintain a year-round ambient temperature with the added benefit of ensuring that the building is ultra low energy.
Andy Mitchell, managing director at 21°, commented, “We’re thrilled to announce the rebrand of Green Building Store to 21°, and our customers can enjoy the same exceptional service and expertise they’ve relied on from us. While we’ll continue to offer advice and guidance for obtaining Passivhaus certification, we’ll also support those not able or looking to achieve full accreditation, but who still want to create a home that’s designed with wellbeing at the forefront.”
“When specified correctly with one another, windows, doors, and MVHR, along with airtightness and insulation, are the core products for optimising for energy efficiency and comfort. It’s this interconnected specification that is key, and central to what we do.”
Image, from left to right: Paul McGurk, MVHR designer, Mark Redmond, windows estimator, Luke Gilman, windows department manager, Tom Heywood, MVHR department manager, Mike Shufflebotham, sales manager.
21° is a NaCSBA member meaning you can trust them on your project.
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The National Self Build and Renovation Centre (NSBRC) in Swindon has launched a new event called Market Day, where many of its exhibitors will be encouraged to be on stand to chat to self builders in a relaxed and informal setting.
Kicking off on Friday 8 March, 10am-3pm, the Market Days will be on the second Friday of each month. The event is being organised following requests from visitors, to give people the chance to discuss projects in detail away from the busyness of the traditional show days.
Plus, visitors will be able to join a free guided tour of the NSBRC’s new-build educational zone at midday.
A list of exhibitors who will be on stand for the next upcoming Market Day is available on the NSBRC’s website, so you can plan you trip to speak to the right companies for your project.
Find out more about the NSBRC’s Market Days
The Right to Build Task Force has published new data that illustrates that not only are self build homes more sustainable than the average new build, but they have a greater beneficial local impact in terms of spend on materials and labour.
This is welcome news that adds weight to the case for a site when it is submitted for planning, contributing to the argument about a site’s impact versus its harm locally.
The National Custom and Self Build Association (NaCSBA) has long known anecdotally that individuals invest more in their own homes in terms of green tech and sustainable methods than mainstream builders, but welcomes the news that for the first time there is data-based evidence to support this.
In terms of building greener, this is mainly due to the fact that self builders invest more than a mainstream builder would as they want a home that’s more energy-efficient and in which they intend to live in for a long time. Equally, they don’t need to factor in a profit margin, unlike speculative builders.
NaCSBA also welcomes the news that the model contributes more locally than speculative building does, as it feeds into local economies – boosting SME businesses and offering training opportunities.
The analysis was conducted by Chamberlain Walker Economics, which used five local authority areas for the research, chosen as they represent a range of types and sizes. These were Breckland Council, Durham Council, Folkestone and Hythe District Council, Herefordshire Council and South Gloucestershire Council.
The Energy Performance Certificates (EPCs) of self build homes in the five areas were reviewed to compare energy usage, in comparison to new builds in these areas.
The research looked at two metrics: average energy consumption and average CO2 emissions. This found that the average energy consumption of custom and self build homes was significantly lower, by 8-42%, while CO2 emissions were also lower, by 7-43%, in comparison to new build local averages.
This adds to the growing evidence of custom and self build as a greener route to housing, such as the survey that showed that more than 50% of self builds have a renewable energy source as their primary heating system.
Using the same five areas, the research examined the economic factors around the local impact of labour and materials for custom and self build. It found that these homes roughly doubled the economic impact of mainstream housebuilding, as self builders buy more materials locally, and also source SME trades for their project.
This equated to self build spending nearly double, at £45 in every £100 spent, as opposed to mainstream housebuilders, who spend £22 on local materials and labour.
This is good news for local authorities, as well as providing a pool of work for SME housebuilders, a group that government is keen to see grow.
NaCSBA member Air Craft Southern has added the innovative Heliomotion system to its suite of heating, cooling and solar solutions. Ideal for any self builder interested in improving sustainability, Heliomotion is a solar power plant for residential and commercial use, that moves to track the position of the sun, thereby maximising efficiency.
Easily installed by DIYers, once in place the configuration follows the sun in two-axes, which means the solar panels can deliver between 30-60% more energy annually, in comparison to a conventional roof-mounted system.
It uses GPS to calculate the sun’s location from its position to maximise the energy produced from solar power. This can be used to power the home, or stored in batteries for later use.
Not every roof is suitable for solar, and Heliomotion is a great solution for those with sufficient outdoor space for this clever alternative to solar generation.
Produced by Bee Solar Tech, tracking systems can increase productivity, meaning that you can secure the same energy output with few panels than a fixed system. Heliomotion won Best Sustainable Technology or Product category in the 2022 Build It Awards.
Government has announced a plan to scrap the stranglehold that nutrient neutrality has had on house building. This saw a complete ban on any new housing in wide areas across England. The announcement is great news for builders, not only self builders but for custom build developers who have been impacted.
Housing Secretary Michael Gove announced a major deregulation of the rules around Nutrient Neutrality which led to 74 councils setting up moratoriums for all new building, following requirements made by Natural England.
Gove commented that cutting the red tape will unblock up to 100,000 stalled homes, which is worth £18 million in activity for the economy.
In the announcement government squarely blames ‘defective’ EU laws for the problem of Nutrient Neutrality, although it was the government quango Natural England that made the requirements that halted building. Most councils enforced a ban in affected areas as not doing so would have left them open to legal challenge.
Nutrient Neutrality refers to run off of excessive nutrients from the land, which pollutes water courses and damages river habitats. But new housing is believed to cause minimal additional run off, with farming and out-of-date water treatment plants being the main forces contributing to pollution.
An amendment to the Levelling Up and Regeneration Bill will bring about the announced change, and building could commence immediately on many sites as a considerable number have planning permission in place.
Housebuilders welcomed the announcement, but environmentalists have criticised government for its stance.
However, government also announced new environmental measures to improve habitats and reduce pollution, including more funding for Natural England’s Nutrient Mitigation Scheme, which offsets any negative impact from house building.
Michael Gove MP said: “We are committed to building the homes this country needs and to enhancing our environment. The way EU rules have been applied has held us back. These changes will provide a multi-billion pound boost for the UK economy and see us build more than 100,000 new homes.
“Protecting the environment is paramount which is why the measures we’re announcing today will allow us to go further to protect and restore our precious waterways whilst still building the much-needed homes this country needs.
“We will work closely with environmental agencies and councils as we deliver these changes.”
The Building Performance Network (BPN) has published three free modules to support a range of stakeholders, including self builders, to help them get sustainability right. The guides are designed to support stakeholders to understand the gap between planned energy performance and the actual reality of living in the home.
At NaCSBA we know self builders often become semi-professional in the level of knowledge they develop as they pursue their own build. As such, while these guides won’t be relevant for all, there will be many self builders researching sustainability who will find them insightful as they work to create an energy home that performs as well as promised.
BPE refers to the performance of a home and its systems. Understanding around this area can be complicated, drawing on various data sources, but is necessary to support the emergence of more homes better able to reduce their carbon footprint.
The Building Performance Evaluation modules:
The guides , the first three of five, will support your understanding of what it’s like living in buildings where sustainability has been factored in, in comparison to their predicted performance. This in turn will help you when it comes to making decisions about fabric and systems for your own build, helping you to cut through the greenwash.
The new guides are available at the BPN’s Resource Hub, which is sponsored by Ecology Building Society, and are designed to be entry level for those who are new to BPE and want to understand how to avoid building inefficient homes.
