Insulating Brick Walls in a Warm-Humid Climate
I’m building a rowhouse in Buenos Aires (walls abut neighbors walls on 2 sides) with brick (the standard building material here). It will have 2 rows of bricks with a gap of around 3cm. I would like to put insulation panels or spray something before the second row of bricks is put up. It is not typical to use insulation in Buenos Aires and I’m concerned about condensation. It’s a humid climate, but rarely goes below freezing.
I’m leaning towards panels of Rockwool or EPS or GPS, or possibly a spray polyurethane foam. Is it safe to say that at my small thickness of insulation I don’t have to worry about condensation problems as vapor will pass through? Do I need any vapor barriers (would have to be a coating vs a sheet) or should I just let this breathe in both directions as a brick house normally would?
I’m thinking no gap and no insulation on walls that abut the neighbors. What about bathrooms on exterior walls with porcelain tiles covering the whole wall – will I have humidity trapped between the tiles and the insulation? Thanks for any advice !
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