[Niteranger68]

Most homes are built so that they 'breathe'. If it doesn't people will have different set of problems in their homes. That means that smelling smoke through a wall is normal even in well built homes, let alone crackerjack conversions.

I have several years of residential construction experience and have never heard of a house "breathing" other than the air flow from the crawl to the attic or from the soffits to the attic. The interior of a house should be reasonably air sealed other than the HVAC system which only circulates the air while cooling or heating. There's no reason a multi-unit apartment/condo wouldn't be built the same way.

[longtermmemmory]

it sounds like a clothing store saying the shoes will strech, or that the ill fitting clothes will expand.