The Power behind Community Energy

People. Preserving everything worthwhile and valuable to our human society is down to us, its people.

Many who have already been part of any kind of community-led action know very well what the successes and pitfalls mean, what they feel like, and how they affect family, friends and community.

Communities driving their own energy and decarbonisation plans understand more than most, how the success, or threat of failure, can mean the very existence, or not, of an otherwise resilient population.  We know energy is a basic human need, required in many forms. Harnessing and sharing knowledge and insight, without leaving anyone behind, is acquired through friendships, acquaintances, experience, and the ability to collaborate well at grass-roots and professional levels.

The scale and scope of the energy a community wants to manage always require these bonds and qualities to varying degrees. There will be inevitable gaps in expertise and practice, however as the drive and progress of community energy, in all its forms, grows stronger, these gaps are getting smaller.

Some gaps are harder to plug than others. Those neighbours and friends who are harder to reach, who may even live on the margins of society, also have a right to a say and to share their ideas. The ability to tap into our thoughts can be challenging for many reasons, however we ignore unexplored resources in our community at our peril. As well as embracing the more marginalised members of our communities to bring them with us, there is a hidden well of ideas and information to be discovered from our sometimes-forgotten neighbours.

The year 2020 made communication challenging for many of us and further isolated some immeasurably. There has never been a more important time than now to stop and speak over that gate or wall, get talking over that friendly cuppa or pint, ensure that no-one is being left behind, and that everyone’s needs and ideas are being sought out and heard.

People are powerful: Every. Single. One of us.

Cath Curd, Orkney office management & administration officer @CES


At Community Energy Scotland we value our team’s and communities’ opinions. Blogs are a chance for us, our members and guests to share personal opinions and expertise, and do not necessarily reflect the views of Community Energy Scotland as an organisation. Please note opinions may change and Community Energy Scotland does not offer any endorsements.

Old and Cold – what can be done?

Daughter No 1 accused me of nerding out on this so it’s obviously a topic for a blog.

We live in an old stone house in the north of Scotland dating from around 1900. It’s a lovely house and the quality of build and materials is very good.

But so is the level of ventilation and it seems clear to us that, unlike today, people then didn’t spend a lot of time sitting around indoors expecting to be kept warm. But what we do to improve the heat retention capability of old houses like ours is, err… a hot topic just now, one which brings together the need to reduce carbon emissions, use less energy, control bills, stay warm and healthy and look after the fabric of our old homes.

So – what to do?

Our house has a fairly standard stone construction of that era. Going from the outside in, we have a thick sandstone wall, a ventilation gap (usually at least 5cm wide) then lath and plaster forming the inside wall. Ground floors are suspended on joists with under floor vents. The whole living space is, in effect, surrounded by a ventilation envelop, going from the underfloor, behind the walls up to the loft. This means that there are not really any damp areas as the whole fabric is very ‘breathable’ meaning water vapour can easily travel through the walls and stone so there is little condensation.

But, despite the thick stone walls, it needs a lot of heat to keep it warm in the winter and is very sensitive to outside temperature changes. Having lived with this for over 20 year with just loft insulation in place, we decided it was time to do some more serious insulation retrofit, but wanted to do this in a way which doesn’t wreck the internal features or reduce the breathability of the building fabric. This is going to be a long-term project: step one is putting in underfloor insulation in the front rooms.

So here’s what I’ve done so far – and bear in mind I’m an unskilled householder albeit one who has always enjoyed construction & DIY stuff.

Step one was to pull out and re-read my copy of The Pebble Trusts’ Sustainable Renovation Guide which has a useful section on underfloor insulation and which I’ve sought to follow.

In a nutshell, the approach involves lifting the floorboards, laying a wind tight but breathable membrane between the joists, filling it with insulation, covering it with membrane then putting back the floorboards. There’s no crawl space so insulation could only be fitted from above.

Here’s how it’s worked in practice…. [Note: I was well aware of the location of services (cables, pipes, drains…) beforehand]

Lifting the floorboards

The old pine floorboards were not in a very good condition as a number had been lifted & split before and were quite gappy. But they had about 2 million old nails in them and were difficult to lift. The only way to do this was to use a long pry bar at the joists and, where possible, shorten the lengths by sawing the boards between the joists. I was hoping to re-use the boards but this proved impossible (although I’ve kept ones that were largely intact for use elsewhere).


Fixing issues
Laying the membrane and insulation

When digging around in an old house you have to expect to find some previously unseen issues. This pic shows that the wooden plates on which the joists rest were rotten in places so I replaced these where necessary. These pics show the rotten wood removed and then the joists resting on new plates underneath over damp proof strips. You can also see the lath and plaster wall construction and the lath battens onto which the skirting board was fixed – all in good shape. One thing that is striking is the quality of the wood in these old houses – very solid and still fine over a 100 years later…provided it has been well ventilated.


The next step was to lay the membrane to hold the insulation. This has to be fixed onto the joists to stop it from sagging down or coming away from the joists and leaving a cold gap. The insulation could then be put in. I used ‘Thermofloc’ cellulose insulation, which is made from recycled paper. It comes in 12kg bags and needs to be broken up as it’s ‘clumpy’. I did this with a garden rake on a piece of plywood.


The next two pics show the membrane in place (including behind the skirting) and the insulation in the joists gaps. In doing it this way I’ve made sure there remains ventilation below the joists and behind the lath and plaster.

I had to remove all the old nails from the joists but other than that the joists were all good. I had a large piece of board that I stood on whilst doing this, to avoid falling between the joists and ripping off the membrane, which would have been disheartening.


Next, I laid a sheet of membrane on top then laid new floorboards (after leaving them for a couple of weeks to acclimatise). An alternative would have been to have laid OSB and then underlay & carpet.

Insulation in place with top membrane; floorboards acclimatising

Floorboards fitted and freshly oiled with skirting replaced

Overall this has been relatively straightforward but quite hard work at times (such as when lifting floorboards and laying the insulation).

Unfortunately the weather has been really warm and sunny so I can’t tell yet whether it will have made any difference to the room’s heat retention….reporting on that will have to wait until winter.


Materials, Costs and Time

Floorboard removal & installation of membrane and insulation up to the point of re-flooring took about 7 days. Installing floorboards took about 5 days. The most time-consuming & fiddly jobs were nail removal, fixing battens to hold the membrane against the joists & taping the membrane up to the lath and plaster (which involved taking off and in some cases replacing the skirting boards).

Materials and costs were as follows:

Constivap airtight membrane ( 2 rolls, 1 used so far)£247
Proclima Tescon Vana tape£22.50
Proclima Duplex tape (for fixing membrane sheets together) £12.40
Thermofloc cellulose insulation (12kg bags) x 25    (12 used so far)£354
Carriage£105
Total incl VAT£889

I ordered the floorboards separately:

Unfinished solid oak floorboards 25 sq m £1,023
KUNOS natural oil sealer, 2 cans £49.24
Proclima tape (2 further rolls)£28.70
Total incl VAT£1320.18

I had to pay a further carriage charge of about £100 for the floorboards – if I had planned it a bit better I probably could have reduced that! I ordered all materials from Ecomerchant, who were prompt & efficient with delivery.

Nicholas Gubbins – guest blog – previously CEO @CES


At Community Energy Scotland we value our team’s and communities’ opinions. Blogs are a chance for us, our members and guests to share personal opinions and expertise, and do not necessarily reflect the views of Community Energy Scotland as an organisation. Please note opinions may change and Community Energy Scotland does not offer any endorsements.

Community Energy in Scotland: State of the Sector 2021

On the 23rd June, the UK Community Energy State of the Sector 2021 Report will be launched. It’s been a mammoth task, and wouldn’t have been possible without the hundreds of hours volunteered by the 424 groups (including 72 in Scotland) featured in the report; all of which was collated and organised by our own staff at CES, and our colleagues in England and Wales, who all went the extra mile to see the work done.

Now, the finished report finally sits here in my inbox. This was the first time that Community Energy Scotland have joined forces with Community Energy England and Wales. The underlying data will form the definitive source on community energy across the UK, and the report will underpin future lobbying efforts in Westminster and Holyrood. But for me, the most important thing about this report is that it gives us a chance to step back, look at the big picture, and think about where we’re at.

The report won’t be published until our launch on the 23rd, so I’m afraid you’ll have to wait a little longer to see all the details; but at least as interesting as the figures themselves are the questions that they raise:

National comparisons

By setting data out for England, Scotland, and Wales alongside one another, the report invites us to compare the state of the sector in each of the nations. One things that’s immediately apparent is how different the generation technology mix is in England (virtually all solar PV) to Scotland (virtually all wind and hydro). There are some obvious reasons for this; climate, and planning restrictions on wind in England to name but two. But it does make me wonder – is Scottish solar resource really as bad as these low deployment levels would suggest?

Meanwhile, Scotland has a clear lead over England and Wales in terms of community energy deployment per capita, but with very low deployment in Scotland in 2021 this gap appears to be closing. Why is that? Could it be linked to the fact that almost all new community generation built in 2021 was solar PV?  And what can we do in Scotland to regain our momentum?

Policy implications

It’s clear from the report that Scottish government support, via CARES and other schemes, is significantly ahead of that available in England. But it is Wales, not Scotland, where new government support measures are most clearly being developed; and criticisms that the English support schemes focus on funding contractors rather than the community groups themselves, and lack support for early stage community capacity building will sadly be all too familiar to Scottish ears.

But the bulk of energy policy is reserved to Westminster, and the real issue is the string of recent decisions that have gouged the business case for community energy everywhere in the UK. So its more important than ever that community groups in Scotland, England, Wales and Northern Ireland join forces in pushing for the changes we need. 

The state of the sector report tackles this head on, drawing on the momentum of the Environmental Audit Committee’s recent letter to Kwasi Kwarteng to set out the policy changes required for our movement to reach its full potential.

Green renewal

This hasn’t been an easy year for any of us, and the report shows that in the reduced level MW capacity of new projects deployed during the pandemic. On the other hand, it also shows how local anchor groups have stepped up, changing their activities and providing emergency support at short notice when the pandemic struck.

Facing difficulties in launching new generation projects, but ever more aware of the need for Net Zero, the state of the sector also shows groups continuing to branch out. A community energy ecosystem in waiting is developing, with new projects planned and underway in low carbon heat, transport, flexibility and energy efficiency. What is now needed is the policy support to unleash this at scale, so we really can build back better in the face of our current crises.

Want to find out more? Attend the UK launch event on 23rd of June, and/or our discussion on the state of the sector in Scotland on 2nd July.

Benny Talbot, Innovation Development Manager @CES. Also working on the development of new Local Energy Economies projects as well as our work with our partners in Community Energy England and Community Energy Wales.


At Community Energy Scotland we value our team’s and communities’ opinions. Blogs are a chance for us, our members and guests to share personal opinions and expertise, and do not necessarily reflect the views of Community Energy Scotland as an organisation. Please note opinions may change and Community Energy Scotland does not offer any endorsements.