Tag: low energy design

  • HPH196 : Why communication is central to self build success – with Lucy Pedler

    HPH196 : Why communication is central to self build success – with Lucy Pedler

    Lucy Pedler, architect and founder of The Green Register, talks about the importance of good communication throughout a self-build project.

    Interview with Lucy Pedler

    As a child, Lucy was interested in the worlds of science and arts and wanted a profession that could combine the two. She qualified 35 years ago, and has worked as an architect in the UK and US.

    Influenced by her father, an environmentalist, Lucy wanted her career to encompass both architectural and environmental work. In the early ‘90s, she worked as a Product Specialist at Construction Resources (the UK’s first Ecological Building Centre) for five years; this involved researching the environmental impact of building materials and systems, and training other construction professionals in green building.

    In 2000, Lucy launched The Green Register, a not-for-profit organisation providing independent training and promoting sustainable building practices across the construction industry.

    Poor communication is the cause of many problems

    Lucy believes we spend quite a lot of time as human beings not saying what we think! If you can communicate effectively – using a bit of tact and choosing words carefully – people know where they stand. Lucy says some people think she’s quite direct but at least there’s no grey area.

    Making the importance of communication clear from the start helps to create an environment where everybody’s comfortable talking about the build.

    A robust brief ensures everyone’s on the same page

    Good communication is key to making the project a success and this begins with a detailed brief. To produce one, the architect or designer must first thoroughly understand what the client wants.

    This document should then be referred to throughout the build process as things inevitably change. For example, there may be planning issues, unexpected problems on site, or design alterations. A detailed brief aids important discussions about the time, cost and design implications of changes.

    It’s worth spending time setting the green agenda

    When people tell Lucy they want a ‘low energy house’ she needs to clarify exactly what that means. Clients may just want low energy bills, or they may have concerns about the bigger picture: the way the house is built, materials used, internal environment, wellbeing, etc. It’s a lot of work that has to be done at the beginning, but Lucy says you’ll reap the benefits throughout the process.

    Be realistic about the budget from the outset

    A fabric first approach is much better in terms of environmental issues and impact. But Lucy understands that the majority of people don’t have the money to do 100% sustainable buildings, commenting, “Don’t beat yourself up if you haven’t got the perfect house because whatever you do is going to be better than the average house in the UK, which is very, very mediocre.”

    Lucy advises people to be honest about access to funds and what you have upfront. Then everybody involved knows what you can afford. You don’t want to run out of money and work to suddenly stop onsite.

    The project lead should manage expectations about cost

    During a career spanning more than 30 years, Lucy can’t remember a project where the cost didn’t change, usually in an upward direction. Managing clients’ expectations won’t make the problem go away, but lessens their disappointment.

    The architect (or lead) should explain the process and set expectations that the project will probably go over cost and time. If unexpected costs arise, they’ll refer back to the brief so the client can decide whether to increase the budget or save costs elsewhere. Lucy says self-builders often see the long-term benefits of increasing the budget.

    There’s huge value in face-to-face communication

    Modern communication technology sets expectations that everything can be done immediately. While some decisions are quick to make, Lucy thinks we’ve lost something in not being given the time to consider things.

    Projects can be discussed remotely using phone, Skype and email, but Lucy gives reasons why talking to clients in person can be advantageous:

    • You can sketch over plans while talking through concepts.
    • It’s easier to compare room sizes on plans with the room you’re all sitting in.
    • Some decisions take a bit of time and are best explained face-to-face.
    • You can observe non-verbal reactions, e.g. facial expressions.

    3D modelling makes it easier to convey concepts

    Many clients can’t understand 2D drawings and Lucy comments, “Why should they? It took us seven years of training to get where we are.” She recommends a programme called SketchUp, which is very simple and can quickly produce a 3D walkthrough to use with clients, helping them to experience light and height and changes in space, etc.

    It’s important that concepts aren’t presented as a fait accompli, and Lucy says clients should feel able to give feedback. Reviewing conceptual designs is a key stage for communication, when you’ll work out basics such as the position of the living room or the size of the kitchen.

    Design iterations take time and can be costly

    Lucy recalls a client who requested ten different designs for a 2m x 2m bathroom and chose the original one in the end! A helpful approach is for the architect or designer to state upfront the number of design options included in their price, and make it clear they’ll have to start charging extra for any additional major changes.

    A collaborative design and build approach is worth considering

    While in the States, Lucy worked with contractors from the conceptual stage onwards and the contractor would inform some of the technical decisions. This approach required a high level of trust, but meant shared ownership of the project. And when it came to pricing the job, the cost was quite realistic.

    Lucy says when you go out to competitive tender, contractors may not have understood the drawings or might not be pricing accurately. She cautions, “Although it might appear initially to be the lowest cost, at the end they’re clawing back what they need in order to make a profit.”

    A neutral third person can mediate between client and contractor

    Lucy says if clients can afford to appoint someone to oversee the project that’s a real plus. The architect or project manager can tell them early on what’s likely to happen during the construction stage and clarify what their fee will cover.

    Self-builders often get much more involved, but Lucy suggests clients don’t take on the project management role themselves as they’re too close to the project and usually don’t have the experience needed.

    Agree a schedule of meetings for the build

    When the construction stage begins, you’re introducing a lot more people, so communication can be challenging. And clients often perceive progress to be slow and see costs increase and timescales slip during this stage.

    It’s helpful to plan a schedule of meetings and clarify to the whole project team where they’ll be held, who does/doesn’t need to attend, what’s going to be covered, etc.

    Lucy says the one group of people they find very difficult to get into Green Register seminars are builders. She recommends ‘toolbox talks’ if you’re trying to achieve a low energy building, as spending just a few hours explaining the concepts is money well spent.

    3 more tips for a successful self-build

    1. The amount of information and decision-making can be overwhelming. Decide how involved you want to be, e.g. technical decisions may be best left to professionals trained to deal with them.
    2. It’s important no one in the team holds back. The client, architect or contractor needs to share their concerns or say if there’s something they have doubts about.
    3. The Green Register encourages post-occupancy monitoring (e.g. of airtightness, fuel costs, etc.). This can reassure you that you’ve got what you set out to achieve.

     

    Find out more

    Visit the website of The Green Register

    Follow The Green Register on Twitter

    Transcript

    Download a transcript of the interview with Lucy Pedler

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  • HPH161 : How I chose an architect for my Passivhaus project – with Ben Adam-Smith

    HPH161 : How I chose an architect for my Passivhaus project – with Ben Adam-Smith

    Ben Adam-Smith shares what he’s learnt during the process of hiring an architect for his self build project.

     

    When things take longer than you hope, there might be an upside

    It’s four and a half years since I first came up with the idea of building my own home. Up until recently, when I bought a piece of land, I have had little to show for my efforts. That does not mean it’s been wasted time.

    In many ways, my unusual path has led to me being more confident in my decisions.

     

    Engage with construction folk at every opportunity

    One thing I did well – albeit by accident – was to start networking with architects, builders, etc. long before I ever needed to hire anyone.

    I remember attending my first AECB Conference at Goldsmiths University in the summer of 2012 and proclaiming I was going to build my own home. Everyone just kept asking: “Have you got your land yet?” I made a mental note that this was clearly an indicator of how ready you are to build: in other words I wasn’t that ready.

    By attending smaller green building conferences (rather than a vast show like Ecobuild) I was able to meet industry folk and learn at the same time. Often the seminars went over my head, but they were always interesting and had something for me to glean.

    My work has resulted in more networking

    Running Regen Media, a production company that helps green builders promote themselves using new media, has been another networking gem. Work takes me to see all manner of buildings and I get to hear the stories behind them.

    And as I grew more and more confident that one of my project goals was to build a Passivhaus, there’s no doubt that working with the Passivhaus Trust was a great opportunity to meet more of the right people.

    Find out more about the Passivhaus Trust’s self build campaign

     

    While it’s unlikely you’ll make connections in the same way I did, take advantage of events like the Passivhaus Open Days.

     

    Trust your gut when choosing

    I don’t know about you but I tend to make a lot of decisions based on gut feeling. After gathering information I make a decision, stick to it, and try and learn from it if it all goes wrong.

    This philosophy has served me well in life and I had no plan to change things here.

    So, my shortlist came together without much deliberation:

    Eco Design Consultants

    Good Architecture

    Parsons + Whittley

     

    Passivhaus experience, a local firm, and a good relationship were important

    What you want to build will ultimately influence your choice of architect. I’ve visited so many Passivhaus standard homes that when I step into a traditionally built house, however splendid, something feels wrong! Therefore working with an architect who really ‘gets’ Passivhaus was a priority.

    I was also keen to engage with a practice that wasn’t too far away. So I ruled out anyone in London. I was after someone with a sense of the area.

    Another key factor was hiring someone that I felt I was on my wavelength. For example, I have seen self build projects that I love, but I wouldn’t dream of working with those architects because of the way they treat staff or some story that has worked its way back to me.

    With a strong shortlist, hopefully all roads lead to a successful outcome.

     

     

    Prepare yourself for questions that might come your way!

    We met on site with each of the architects to have a chat, and then had a coffee to discuss how they might work.

    All of them wanted to know what build route we would be taking. It’s funny that this question took me by surprise. In some respects I imagined this might be something that the architect would advise on! However, I suppose I know that I want as little involvement as possible, so that will push me to the contractor end of the scale.

     

    Are there differences between hiring a solo architect versus an architecture firm?

    This was a point where I really struggled.

    A larger firm will have more projects going through which will mean yours is just another project. Perhaps a solo architect would be more attentive? Or is the reverse actually true?

    Does a firm, by its nature, have a broader scope of design? What if you don’t like designs from the solo architect?

    Which will be more efficient? It could go either way.

    I don’t know the answers but I feel this is an avenue to explore.

     

    RIBA’s stages made cost comparisons easier

    It’s interesting how the early stages of design actually account for little of what you might eventually pay an architect.

    Each of the architects were comparable in price in the design and planning stages.

    Where things really differed were when we get to the build stage of the project.

    We had fixed fees versus percentage of the build cost to weigh up.

     

    The practice we appointed

    We decided to hire Parsons + Whittley as our architecture firm.

    As I’ve mentioned already, this was to do with having visited a number of Chris’ projects and been impressed.

    I also liked the fact that Chris is not the architect! Our architect will be John; Chris, as he often says himself, is the strategy man.

    We also face a challenge in that my wife doesn’t like new builds! Personally I feel that she will like it if we can get the design right. Some of that may actually involve a change in our attitude and I’m hopeful that Chris is the person to help us on that journey. I just have a feeling he will say the right thing or educate us where we need to challenge our thinking.

     

    Find out more

    Visit the website of Parsons + Whittley

    Follow Chris Parsons on Twitter

     

    The National Self Build and Renovation Show

    Ben Adam-Smith will be sharing some of his self build journey at the National Self Build and Renovation Centre. He’ll be talking at 1pm on Friday 27th January and Sunday 29th January. On the Saturday he’ll be trying to sell his house (to free up equity for his self build)!

    To find out where Ben will be speaking next or when the next House Planning Help meet-up will be, check out our events page.

     

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  • HPH034 : Balancing Environmental Design and Low Energy Design – with Wilf Meynell

    HPH034 : Balancing Environmental Design and Low Energy Design – with Wilf Meynell

    Architectural designer Wilf Meynell explains the concept of environmental design and why it is not the same thing as low energy design. He also shares how he has tried to balance these two approaches in one of his upcoming projects, Springfield House.

    Wilf-Meynell-photo

    Interview with Wilf Meynell

    Wilf Meynell studied architecture at Brighton University and then did a diploma at the University of East London. At the latter he was tutored by Sofie Pelsmakers, whom he credits for influencing him and developing his interest in environmental design.

    We Are Losing ‘Direct’ Control Over Our Indoor Environments

    Wilf was brought up in the countryside and has always had a good connection with his surroundings. However, he believes that as technology has improved and buildings have become better at monitoring themselves, occupants are starting to lose that link with the environment.

    Whereas opening a window or putting a log on a fire is very much instigated by the user, modern buildings maintain good comfort levels largely by themselves.

    Our Focus on Low Energy Design Could be at the Expense of Environmental Design

    While low energy design is a very good thing, Wilf thinks it should not be at the cost of environmental design. It is just as important to get the right specification of locally-sourced materials, to harness the full potential of the sun to provide energy, and to look at the prevailing winds and consider natural ventilation. Low energy design and proper environmental design need to come together in future constructions.

    Without a Strong Connection to the Environment We Lose Sight of What We’re Doing

    Taken to an extreme Wilf believes that focussing exclusively on low energy design could distance us from our environment. There could be knock-on effects with things like recycling and landfill, where we just see our environment as a body in which to store things we don’t want.

    Case Study: Springfield House

    Wilf uses one of his current projects to help explain how low energy design and environmental design can work together.

    Springfield-House-(visual-from-south)

    Visualisation of Springfield House

    The Site was Chosen to Get as Much from Nature as Possible

    Springfield House didn’t initially have a site but this proved quite good from an environmental design point of view because they were able to consider locations that could have as much from nature as possible. The plot they chose is south facing with well-managed woodland around it. Therefore there is a good source of timber for the construction and it can also provide fuel (waste timber not virgin timber) for the house once it’s built.

    Key environmental concepts such as this have helped push Springfield House towards Code for Sustainable Homes level six before even considering any green technologies.

    Depth of Plan is an Important Consideration of Natural Ventilation

    Natural ventilation, as the name suggests, is about supplying and extracting air to a building without the use of mechanical systems. Wilf says that one of the most important considerations in this process is the depth of plan, because with a very deep plan of building a lot of air has to be moved from one side of the building to the other. Springfield House is a ‘u’ shape so that the plan never reaches a depth of more than 4 metres.

    Springfield-House-model-(overhead)

    A model of Springfield House (overhead view)

    Other aspects that important are high ceilings in order to stop the heat building up at the top of the ceiling space and a high façade to pull a lot of air and wind around a certain area.

    The Stack Effect Helps Drive Air Through the House

    Due to differences in pressure – utilising the stack effect – air is driven through the house from a low point in the extremities, up through the core and out of an openable Velux window over the stairs.

    Springfield House is angled towards the prevailing wind to get maximum use of natural ventilation but because of the stack effect no matter which direction the wind is blowing, it’s still going to pull air through the building.

    Occasional Purging of Air is Necessary in Winter

    Although the building does not need to be ventilated constantly, it will need to be purged every so often. For example in winter, you’d want to keep the windows closed most of the time in order to retain the heat. Opening a window for 10 seconds will wash all the smelly air out and bring the fresh air in without losing much heat.

    Springfield House’s core also separates the two living spaces, which means the core can be purged independently.

    Air Quality Can Suffer if The Structure is Too Airtight

    In a naturally ventilated house there is no reason why it cannot be quite an airtight structure. However, if it’s too airtight one of the dangers would be that the quality of the air in smaller rooms on the extremities of the building might suffer.

    More High Quality Components Need to be Made Locally

    Springfield House takes a fabric first approach but Wilf is concerned that getting the right products comes at a large cost in embodied energy. For example, manufacturing of high-end Passivhaus standard products is done in Central and Western Europe, which must then be shipped in.

    Springfield-House-(visual-from-east)

    ‘Low Technology’ is About Letting the Design do All the Work

    Springfield House has two periscopic entities that look out over the site. This not only takes advantage of the views but it’s about the sun. The 1200mm overhang stops all the sun coming into the house in the summer whereas in the winter the angle drops to about 16º (in the UK) and most of the sun can then pierce through the building, heating it up. This low tech approach has been in existence for centuries.

    Springfield-House-(visual-from-north)

    Trees Provide Solar Shading

    Using trees is another way to improve the efficiency of the building. In summer when the trees are in bloom less sunlight can reach the house whereas when once the trees have lost their leaves more light can enter.

    Knowledge Needs to be Passed onto Successive Owners of the House

    Wilf’s client very much wanted a house that requires a hands-on approach. As this is slightly different to other houses it’s important that the user understands how it works. So, if this basic knowledge were not communicated to a new owner then there might be a problem.

    In the same respect, new occupants of a Passivhaus would need to understand the impact opening a window would have on the building dynamics.

    Mechanically Ventilated Air is Different to Fresh Air

    Wilf believes there is a big difference between fresh air and mechanically ventilated air. He uses the example of how he really likes the experience of feeling fresh air coming in through a window onto his face.

    It’s also about losing touch with the environment outside because the air has been filtered of smells and so forth.

    Upfront Planning has Been Key to Keeping the Costs Down

    A lot of work has been invested upfront to try and source local materials and reduce the environmental impact of Springfield House. Wilf talks about three western red cedar trees from the neighbouring woodland that have been earmarked for the cladding. By using a mobile sawmill this will keep the cost down as well as the need to transport materials.

    Wilf also gives another example of how the house will be built into the bank and the spoil will be used to re-landscape rather than sending it off to landfill.

    The Thermal Mass Provides a Natural Control System for the Heating

    Springfield house has an oversized concrete stair at the core of the building. While it is not ideal from an environmental standpoint, if specified carefully it can huge benefits as the thermal mass of the house. This will store the sun’s heat during the day, especially in the winter, and give back gently to the building. Also in the summer it will provide cooling because rather than that heat being in the air it’s in the concrete. As the core can be shut off from the main living spaces it can be quite a good way of providing a very natural control system for the heating.

    The Timber Frame Sequests Carbon

    Springfield House will have a timber frame that is a stick build. This means they are going to build it on site rather than importing a prefab frame from another country (for example). Part of the thought behind using a timber frame is that it sequests carbon. In other words, if the building lasts for 200 years the carbon would be locked up in the timber. Otherwise, in that same time, the tree would have started rotting and slowly bringing the balance of carbon in the atmosphere back down again, which is one of the problems we’ve got with global warming.

    Transcript

    Download a transcript of the interview with Wilf Meynell.

    Our Question for the Comments Section

    Is your build guided more by low energy design or environmental design?

    Cropthorne Autonomous House

    Read the blog post about Mike Coe and Lizzie Stoodley’s autonomous house. Find out where they got their inspiration, why it means they have a stronger connection with their environment and how it puts them in a good position for the future.

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