Workshop: Strategic insulating

Thermal Envelope

Thermal envelope – strategic insulating.

More than insulation, thermal inertia and hygroscopicity. Tackling cold spots to remove discord and create harmony. Double and secondary glazing, solid and suspended floors, lofts and voids. Internal IWI, external EWI and solid wall insulation SWI.

When: Saturday, 18th July. 12-5pm
Where: 14 Richmond Road, Montpelier, Bristol BS6 5EN [Map]
Cost: Free (Booking essential)


  • Principles – thermal and vapour resistivity, thermal inertia and hygroscopicity.
  • Tools – guide rail saw, drill and driver, trowel and hawk.
  • Projects – fleece, board, lime mortar, lime plastering and wallpapering


The third in this series of home improvement workshops, we’ll look at the thermal envelope. More than u-values and vapour gradients, we’ll take look at the traditional thermal envelope, thermal inertia and hygroscopicity. Understanding breathable, synthetic, natural and traditional materials as well as architectural detailing and hygrothermal passive heat recovery.

External weather patterns, local topography, solar aspect and evapotranspiration all effect the thermal envelope, as well as occupant behaviour, and internal weather. Warm moist air is conveyed to cold spots, insulating some parts of a building can makes other parts relatively colder causing damp.

We’ll also be getting to grips with some tools, learning transferable skills and tackling some basics yet essential home maintenance. We’ll be working our way through the tool box this series, learning top tips and proficiency with every tool you’ll need around the home.

This month vapour control part 1, hygrothermal passive heat recovery, the relationship between energy and damp. More than internal insulation we’ll be capturing energy from moisture, preventing heat loss whilst solving a damp problem. We’ll be learning how to prepare, mix, and cast Hemp Lime to existing masonry. More than internal insulation we’ll be capture energy from moisture, preventing heat loss whilst solving a damp problem.

Booking closed

The Neighbourhood Construction workshop is situated in Montpelier central Bristol.

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May workshop:
Informed occupant behaviour
The most inefficient thing in a house is the occupant.

June workshop:
Successful draught-proofing
Wind sucks, it’s not blown, cross ventilation stratification and convection.

July workshop:
Strategic insulating
More than insulation, thermal inertia and hygroscopicity.

August workshop:
Mitigating moisture
Taking apart the hidden history of repeated damp remediation.

Previous talks

January talk:
Energy retrofitting
Why it doesn’t work and why it causes damp.

February talk:
Bristol Green Roofs
Mapping the city’s green roof strategy in 2015.

March talk:
Bristol Hemp Lime
Casting hemp lime onto existing masonry.

April talk:
Neighbourhood Construction
Casting hemp lime onto existing masonry.

See all talks and workshops

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