Sustainable Building Forum
The place to share best practice advice about all things sustainable building. Use the search icon to find the topic you’re interested in or register as a member to comment on topics and ask your own questions.
Closing up an (internal) chimney breast
We are removing a gas fire and replacing it with a radiator. The chimney breast is on the internal party wall with our neighbours (1930s brick built semi).
We are trying to figure out what needs doing for ventilation and insulation of the (now retired) chimney. Do we fill the whole thing with insulation, or is there a simpler solution?
I would suggest filling the void with an inert insulant, such as Vermiculite, so that there is no air movement up through the chimney to take heat away from either you or your neighbour. If you take this up to the insulation envelope of your house then you will large stop most of the heat loss into the structure. The top of the stack would then be capped off with a vented cap to allow a small amount of air exchange.
Hope that helps.
We offer dynamic heat and moisture modelling as well as condensation risk analyses.
Back to Earth is a natural building material supplier. We're not your typical builders' merchant though and instead work closely with our clients during the planning, designing and building phases of projects.
Back to Earth is a proud signatory of the Anti-Greenwash Charter: