Tag: weatherize

  • HPH048 : Making Incremental Improvements to Your House – with Sarah Lonsdale

    HPH048 : Making Incremental Improvements to Your House – with Sarah Lonsdale

    Sarah Lonsdale, an eco columnist for The Telegraph, shares a list of 30 home improvements she has made to reduce energy bills, and save energy and water. Ultimately Sarah would like to build a new home (such as a Huf Haus or Passivhaus) but in the meantime she explains the benefits of incremental upgrades.

    Sarah-Lonsdale-picture

     

    Interview with Sarah Lonsdale

    Sarah Lonsdale has been a journalist ever since she graduated from university. Initially a news reporter, when Sarah started a family she decided to write features on a freelance basis.

    Over time these have come to focus more and more on environmental issues, and she now has a very popular column on ‘eco living’ which is published every week in the Sunday Telegraph.

     

    Homeowners Lack the Confidence to Make Their Houses Energy Efficient

    Sarah gets a lot of emails in response to her column and she says that there is a real interest in energy efficiency, particularly when it saves money.

    However, she believes that people are lack good information and are very apprehensive when it comes tinkering with the fabric of their homes.

     

    Sarah’s Perception of a ‘Good House’ has Changed Over Time

    Sarah lives in a house that was built in the 1920s (pictured below).

    Sarah says: “At first I thought I loved it, lovely character, original fireplaces, original character but actually having visited beautiful eco homes for the last five to ten years I’m really jealous and I would love to live in an airtight Passivhaus.”

    Sarah-front-house

     

    This podcast is slightly different to normal because Sarah leads us through some of the alterations, both big and small, that she has made to her house.

    A lot of these improvements have been targeted after she got an energy assessment from Parity Projects.

    This list of Sarah’s home improvements is in no particular order.

     

    1) Cavity Wall Insulation

    Filling the cavity was one of the first upgrades Sarah made, which made a noticeable difference the following winter when the house felt warmer and the bills were lower.

    However, a blown glass fibre was used and Sarah feels it must have settled over time, because she’s no longer enjoying the same rewards.

    If she could afford it, she would have it ripped out and start again because in the 15 years since the walls were treated, the techniques and products have advanced.

     

    2) Internal Insulation in the Living Room

    Donnachadh McCarthy once advised Sarah that if she could only insulate one room it should be the living room. This is because it’s the place that you withdraw to on cold winter evenings!

    So Sarah internally insulated with sheep’s wool insulation, which is a breathable material. The wall was finished with tongue and groove boarding.

    The open fireplace was also upgraded to a very efficient wood burner, which makes this the cosiest room in the house!

    Tongue-and-groove-in-living-room

     

    3) Insulate Loft Bedroom with Celotex

    Sarah wishes she had known more about insulation when she converted the loft into a bedroom in 1999.

    About three years ago they put in Celotex insulation, then plasterboard and also used tongue and groove boarding.

    Sarah reflects on the upgrade: “It’s changed that room from being unbearably cold in the winter to again being really snug.”

     

    4) New Door Between Porch and Hall

    With a north facing hallway, the cold used to come right through the front door.

    So two changes were made. Firstly a new door, which was properly insulated, was added between the porch and the hallway. Secondly, the single panes in the other door were upgraded to double-glazing.

    Door-between-porch-and-hall

     

    5) Replace Old Boiler with Condensing One

    Before upgrading the boiler the house did not have a thermostat!

    Even when it did have one, it was located in the hall which was picking up the cold draughts from outside and keeping the boiler on when the house was already at a good temperature. Installing the new door between the porch and the door really helped the thermostat do its job properly.

     

    6) Replace Four Old Single Paned Crittal Windows with Double Glazed Version

    When Sarah moved in all the windows were single paned steel Crittall windows which were draughty and out of shape. She has tried various different types of windows over the years!

    Replacement steel framed Crittall windows threw up some problems. They looked authentic but there was a cold bridge all the way round the metal frame and consequently black mould developed.

    Triple glazed windows were installed on the north facing rooms, which worked well but they were pretty expensive. Sarah says: “When we ran out of money we got a carpenter to put fixed secondary glazing in our other north facing windows and I would say that’s worked almost as well as the new windows. Aesthetically not particularly as beautiful as brand new timber framed triple glazed windows but they do the job.”

    New-low-e-rooflights

     

    7) Carpet in Playroom with Super Thick Underlay of Recycled Tyres

    In an interview with Roger Hunt, Sarah learned that if you put all the holes in the floorboards together you get the equivalent of a big open window!

    So in the children’s playroom they put down a thick thermal underlay made out of recycled car tyres and a woollen carpet on top.

     

    8) Chimney Sheep

    One simple and instant fix was a draught excluder for the chimney. Sarah has a Chimney Sheep!

     

    9) Insulate Unused Back Door

    With an unnecessary door at the back of the house, Sarah decided to remove it completely. So it was boarded up and insulated.

     

    10) Triple Lined Curtains in North-Facing Bay Windows

    There have been some Crittall windows that Sarah either cannot afford to or doesn’t want to replace.

    So thermal triple-lined window coverings stop the draughts from coming in. These were put in when the old curtains needed replacing anyway.

     

    The Remaining Items on Sarah’s List

    Although we didn’t talk about these in the podcast, there were still other items on Sarah’s list:

     

    11) Insulate dormer ‘cheeks’ in daughter’s room

    12) Large double glazed windows on south side for solar gain

    13) New super efficient windows in kids’ bedrooms

    14) Replace ancient 12 l loo cistern with 3 l one

    15) Replace old taps with aerated ones

    16) Fixed secondary glazing to bay windows

    14) Thermal roman blind in landing

    16) New low noise Velux windows to loft bedroom

    17) Replace open fire in living room with wood burner

    18) All bulbs cfl or led

    19) Use an insulated kettle

    20) All white appliances AA-rated

    21) Indoor washing line for drying without tumble drier

    22) Sheep’s wool insulation in north facing window seat structures

    23) Draught strip front door

    24) Take out old ventilation hatch in kitchen, stuff void with sheeps wool

    25) Magnetic plastic secondary glazing in kids’ bathroom

    26) New porch to act as thermal buffer on north side

    27) Install Thermostat

    28) Insulation to front door

    29) Digital solar radio for listening to test matches in the summer!

     

    Resources Sarah Mentioned

    Greenspec

    Green Building Store

    Parity Projects

     

    Transcript

    Download a transcript of the interview with Sarah Lonsdale.

     

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  • HPH047 : Choosing a Suitable Property to Eco Retrofit – with Ian McKay from BBM Sustainable Design

    HPH047 : Choosing a Suitable Property to Eco Retrofit – with Ian McKay from BBM Sustainable Design

    Ian McKay from BBM Sustainable Design shares how to find a property that will lend itself well to an eco retrofit.

    He also contrasts two very different projects, the retrofit of a 1960s terraced house and the upgrade of a Victorian villa from the 1890s.

    Ian-McKay

     

    Interview with Ian McKay

    Ian McKay is a director of BBM Sustainable Design. Winning Futurehouse, a RIBA competition, in 1993 set the tone for the company’s passion to create better buildings.

    Futurehouse-550

    Futurehouse, Milton Keynes

     

    Minimise Energy Demand Before Generating Energy 

    An eco retrofit is a way of taking an existing building and reducing its energy demand to make it comfortable during the extremes of weather and so forth.

    This is likely to include adding insulation, making sure the windows are airtight and insulative in their own right, and considering whether the heating sources are as efficient as can be.

    The key thing is about minimising the energy demand first rather than thinking about how you’re going to make the energy.

     

    Fussy Architectural Details Make Retrofits Expensive

    Choosing the right candidate building to start with can make the project simpler and thus more cost effective.

    Very complex forms, lots of roof shapes and little bay windows are beautiful but will be incredibly expensive to eco retrofit.

     

    Simplicity is at the Heart of Houses that are Cheap to Treat

    Ian gives an example of how he did a project for his family on a two-storey timber frame ‘shoebox’ built in 1969.

    Ian says: “We just knew immediately when we first saw the building that’s going to be cheap to treat.”

    In total (with solar panels, etc.) it cost £70,000 (whereas a low carbon refurbishment of a residential property can often cost £250,000). 

    baronsdown-exterior

    Barons Down has a simple form

     

    A Terraced House Will Have Fewer Walls to Treat

    In a terraced house it would be unnecessary to treat the shared walls because the neighbours will be heating their spaces and so there would be very little energy loss.

    Even if the neighbouring property was vacant the temperature would never get down to outside air temperatures.

    baronsdown-interior

     

    Older Properties May Have More Irksome Problems

    As older houses tend to be a little bit out of plum certain jobs might take slightly longer in an old house compared to a modern house.

    Ian gives an example of how a carpenter might need an extra half an hour to hang each door because the frames are out.

     

    In the UK, Refurbishments are Heavily Taxed

    While the new build option is 0% VAT in the UK, refurbishments and extensions are taxed at 20% VAT.

    Ian explains that there is a loophole: “People should be aware that it’s 5% VAT if it’s strictly speaking just eco retrofit, low carbon refurbishment. If you are mixing it up with an extension or creating a loft conversion or extensive alterations in the house which are not to do with making it energy efficient then it makes the contract impossible to segregate out the 20% from the 5% .”

    By splitting it into two contracts, doing the extension first and then the eco retrofit as the second, it is possible to take advantage of the 5% rate. However you have to make sure that you’re not going to run out of money.

     

    Internally Insulating to Very High Levels Can Damage External Masonry

    When Ben asks whether it’s best to avoid buildings that need to be insulated internally Ian explains one of the issues associated with a solid masonry construction.

    Internally insulating means that the external wall stays cold and damp through the winter and it hasn’t got the ability to release that moisture quickly. This can result in increased frost damage on the outside faces of the brick.

    On the inside where there’s a cold face up against the insulation or maybe a small air gap, this can be susceptible to mildew and fungal growth (which is very bad for internal air quality).

    So another rule of thumb is to make sure the internal insulation does not have a very, very good U-value.

     

    If You Have to Insulate Internally, Use Breathable Materials

    By using breathable insulation products, such as calcium silicate boards, the moisture is able pass through.

    Ian continues: “It’s applied directly onto the masonry face but it allows that moisture to come through and you put a lime plaster on the face. That also breathes. Don’t, for goodness sake, put emulsion paint on. Put a mineral based paint onto the lime plaster because that also breathes. If you fill up the pores with an emulsion paint then it can’t breathe any more. But that helps to keep the wall healthy, it helps bring the moisture out of the wall into the internal heated space and then it can ventilate that way.”

    Barons-Down_Cross-section

     Cutaway graphic of Barons Down

     

    Sheep’s Wool Insulation was Used in the Studs 

    The Barons Down project was a timber frame house which was insulated from the inside. The old plasterboard was taken off, the walls were built in slightly and the depth of the studs was increased to 150mm. Then these were filled with sheep’s wool insulation.

    sheeps-wool-and-studs

    Studding into the room to form a deeper insulation void

     

    A Perimeter Channel of Insulation was Dug Around the Ground-Bearing Slab

    As the ground-bearing slab at Barons Down had no insulation on it and the ceiling heights were very low, it was not an option to build on top.

    So they dug a perimeter channel of insulation at the edge of the slab to make a little thermal break.

    They then used 8mm of cork right across the ground floor which itself is a good insulative material.

    Perimeter-channel

    The perimeter floor channel which formed the thermal break

     

    Consider the Different Solutions Upfront

    Before buying a property, it’s important to have an idea of the different wall and roof solutions etc. that could be applied.

    Hiring a professional is likely to pay off.

     

    Conservation Orders May Limit How a Building Can be Treated

    Ian talks about a project called The Nook that was part of the Retrofit for the Future programme.

    Built in the 1890s, this Victorian villa is a solid wall construction. As it’s located in a conservation area, that meant that the front elevation could not be treated on the outside.

    Nook-before-retrofitNook-after-retrofit 

    A Hybrid of Internal and External Insulation was Used

    Three of the walls were treated externally but because of the architectural features (the two bay windows) the front elevation had to be treated on the inside face.

    Therefore that front elevation is not insulated quite as well as the side and back elevations (which were treated from the outside).

    External-insulation-on-Nook

    External insulation going on

     

    Upgrades Like This are Expensive

    It cost £130,000 just to treat the external fabric of the building. It did also get a new boiler and mechanical ventilation system with heat recovery.

    Although it achieved the target for the Retrofit for the Future programme which was roughly around that 17kg of carbon per annum per m2, it is hard to justify from a cost benefit analysis.

    Insulation-to-bottom-step

    Floor insulation to ground floor to full depth of first step of staircase

     

    Our Housing Stocks Needs to be Evaluated

    Ian believes there is a case for evaluating a large amount of our housing stock.

    If it is uneconomic to treat so that people can live comfortably and affordably, then we ought to consider large-scale renewal.

     

    Find Out More

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    Follow BBM Sustainable Design on Twitter

     

    Transcript

    Download a transcript of the interview with Ian McKay.

     

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  • HPH045 : Why Are More People Not Retrofitting Their Homes?

    Upgrading your property so that it is more comfortable and costs less to run makes sense. If we’re serious about tackling climate change then retrofitting has to be undertaken on a huge scale. So if it looks good on paper, why are very few people doing it?

    In this discussion (which was one of our Google+ Hangouts) we consider some of the barriers that may be putting people off.

     

    The Panel

    Managing Editor of TreeHugger Lloyd Alter (who was our guest in episode 35)

    Host of the Home Style Green podcast Matthew Cutler-Welsh (who was our guest in episode 21)

    Writer and blogger Roger Hunt (who was our guest in episode 10)

     

    Large Houses Could be Sub-Divided

    Lloyd Alter explains that he’s in the middle of a retrofit where he’s reducing the energy use per capita in the house.

    By duplexing his home, instead of just two people living in the six bedroom property there will be six people.

    Taking this approach means he doesn’t have to ruin the character of his 100 year old house by changing windows and adding insulation. The rent from these units will also fund the alterations.

     

    When Homeowners Have Money, They Use it for Other Things

    Matthew Cutler-Welsh shares research that of the 1.6 million houses in New Zealand (where he lives), around 1 million are below World Health Organisation requirements for maintaining a comfortable temperature. So there is definitely a need to retrofit.

    Although many people typically spend between $3000 and $5000 on their homes each year, that money tends to go on new decks or redecorating bathrooms etc.

    Homeowners like to see where their money goes.

    Matthew says: “Caulking, insulation, draught-proofing – can you think of anything less sexy to buy!”

    Home decorating mature man painting wall roller 

    Poorly Executed Retrofits Could Do More Harm than Good

    Roger Hunt acknowledges that as Britain has some of the oldest housing stock in the world there is definitely the need to upgrade it.

    However, with a lot of old buildings comes the responsibility to care for them in a special way.

    With many professionals still learning about the most effective ways to carry out these upgrades he’s concerned that some of these measures (such as insulation solutions) may not be appropriate in the long term and ultimately will have to be ripped out.

    This could be another reason why people are reluctant to carry out an extensive retrofit because they are not confident that it is the best thing to do.

     

    Payback Periods Are Often Too Long

    There are many examples of where replacing windows in older properties is not only inappropriate and devalues a property but there are very long payback times as well. Roger has seen payback times of 97 years quoted for some replacement windows!

    Losing original wooden windows to landfill is also equivalent to throwing out an antique chair.

     

    There is a Lack of Good Information

    People don’t have the right information, partly because the construction and renovation industries are built around the idea of selling people stuff.

    Lloyd shares a resource from Minnesota Power that sets up a hierarchy of things that you could do. If people really care about saving energy then a lot of the best things cost very little money.

    Proper thermostats, caulking, weather-stripping, sealing can make a huge difference. Instead people invest in granite counters or solar panels on the roof because these measures can been seen!

    Information

     

    People Feel They Have to Do One Big Retrofit

    Roger suggests that people don’t have to do this all at once. They need to work out their retrofit roadmap and plan those stages, even if it’s over a period of 10 years.

    The important thing is that all the phases work cohesively.

     

    Awareness is Increasing Even if Mass Action is Not

    Roger talks about one of the positive aspects of the UK’s Green Deal is that it has got professionals thinking more about solutions.

    Matthew also says that New Zealand’s equivalent programme has educated the general public in terms of what R-values are and so on.

     

    More People Will Retrofit as Energy Prices Increase

    In Canada natural gas prices have just doubled, so the volatility of energy prices is a trigger for homeowners to explore how they can reduce their bills.

    Lloyd says: “The problem with energy in North America is it’s just been too cheap. It doesn’t put enough pressure on them.”

    A large proportion of people in the US and Canada are over-housed which is leading to a mass down-sizing.

    ?????????????????

     

    Energy Efficiency is Still Not Valued Enough 

    Despite Energy Performance Certificates being a requirement in the UK, they do not drive the market (as might be the case with a car’s performance).

    Roger feels that as more people slip into fuel poverty, day-to-day running costs will start to register when people buy houses.

     

    Getting Building Permits for Small Renovations is Increasingly Difficult

    Lloyd says that over the years it has become harder and harder to carry out small renovations.

    He gives an example of how despite having a very competent green carpenter there was an excessive amount of paperwork to get things moving. Having to deal with this level of bureaucracy may deter some people.

     

    More Houses Need to be Seen by Trained Professionals

    Matthew stresses that in order to create better buildings, more trained professionals need to be involved.

     

    Watch the Google+ Hangout

    Do you fancy getting involved in a future discussion? Well, check out the schedule.

    Transcript

    Download a transcript of the debate.

     

    Our Question for the Comments Section

    What is stopping you from retrofitting your home?

     

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