Exciting results – February 2019

A warm and dry cosy family home

Research: – Exciting results – February 2019


February 2019


When: Friday 1st February 2019, 7 – 9 pm
Where: The Portcullis, 3 Wellington Terrace, Bristol BS8 4LE
Cost: Free event




Energy retrofitting – monitoring and evaluation

Dr Nick Banks – Senior Development Manager
Centre for Sustainable Energy

Plant-based insulation materials – the future

Dr Judith Thornton – BEACON – Institute of Biological, Environmental & Rural Sciences (IBERS)
Aberystwyth University

Research and results – bio-aggregate retrofitting to existing masonry

Steven Cole – MSc student, Centre for Alternative Technology (CAT)
Aberystwyth University Visiting Researcher


This sociable informative evening will be interspersed with conversation and the opportunity to meet others undertaking successful home improvements.

The Portcullis is a historic public house, built into a raised Georgian pavement near the Clifton Suspension Bridge. You’ll find us upstairs, the event-space is friendly and intimate, but with limited capacity.


We’ll look at the issue of retrofitting insulation from a variety of angles.

There is a plethora of insulation materials available, many with dubious environmental claims. How many of these products do we actually need and how can we choose between them?

We’ll look at some results from measuring heat flux across bio-aggregate insulations. Evidence of outcome is crucial to the uptake of measures, and to realising improvements in thermal comfort and affordability. But how do we measure improvements against a backdrop of enormous variability between households?



A warm and dry cosy family home

We organise our events using Meetup, it’s quick and easy to use, you can stay in control of how you’d like to be engaged. We purchase an annual subscription to host the Neighbourhood Construction Meetup group so you don’t have to. Meetup doesn’t share your information with us.



Further information


Assessing risks in insulating retrofits using Hygrothermal software tools. Heat and moisture transport in internally insulated stone walls.

I can well believe the resulting assembly has a beneficial sanitary effect on the internal environment.

Joseph Little


Measuring heat flux in-situ. Determining the impact of varying mixes, ratios and densities on u-value, and their implications for best practice and performance.

Insulating solid-wall houses using plant-based materials

Dr Judith Thornton

Bio-aggregate installed

Removing the Smögåsbord of cement render and vinyl paint to reveal brickwork eaten away by condensation trapped in the wall. 

Insulating my cold damp house

Sarah Jones-Morris


Casting bio-aggregate wall insulation to existing masonry – undertaking specialist training, a practitioner perspective.

Process – protocols and principles

David Copeland

A warm and cosy family home

Early adopters looking for a more sympathetic approach to insulating our heritage housing stock with support from Joseph Little Dublin Institute Technology and Bristol City Council Principle Historic Environment Officer.

A warm and cosy family home

Jess Walker


Early prototyping, testing transient hygrothermal performance analysis with extremes of moisture. Research requires double-loop learning and real-world collaboration.

How I found myself papering the bathroom

Nic Price


Poor ‘workmanship’ scapegoats poor science, poor design and poor process…

Unsuccessful external insulating schemes – Disastrous Preston retrofit scheme remains unresolved – Passive house



It’s a long story…


Short stories…