Insulation for a timber frame house with brick infills

[pipthecats]

I wanted to get some advice on insulation for my timber framed house with brick infills. My options seems to be build a wall out and fill with either steicoflex or sheets wool. I'm unsure how well this works against the brick and moisture. Has any one done this kind of thing before?!

 

[aockenden]

Another option worth considering is insulated lime or clay render / plaster. The idea is to mix an insulating aggregate (hemp shivs, granulated cork, perlite, pumice, charcoal / biochar, etc.) into a lime or clay binder and apply it thickly (up to 8 or even 10 cm thick) directly onto the cold wall. The advantages are that it allows you to maintain natural organic wall-shapes and that it leaves no gaps behind which condensation can form, which can still happen even when using breathable insulation systems like wood-wool or wood-fibre (unless you do a thick lime parging / harling coat on the wall first and embed the breathable insulation boards directly into that while the lime coat is still wet).

It will tend to be somewhat less insulating per unit of thickness vs. the breathable insulation board options though, and if you've already got fairly straight brick and timber walls then maybe there's not much organic shape to save to begin with. Not sure how the costs would compare.