I too would like to get back to Mr. Shiner for a couple of quick questions, and the others could comment.
Many of the areas you referenced.... The building codes are primarily provincial, although there is a national building code, but it's more aspirational than enforceable. The provincial building codes are the ones that actually govern construction against the national building code, but it also relates to some of the other challenges around subsidizing housing and subsidizing the fixing of housing.
When there are clear national standards required, would you support intervention on provincial jurisdiction in order to get the issues you've addressed dealt with?