Why does my house feel draftier after remodeling?

Your house feels draftier after remodeling because the work likely disturbed or bypassed your home's air sealing, creating new pathways for cold air to enter. This is one of the most common post-renovation complaints in Toronto homes, and the good news is it's almost always fixable.

When walls, ceilings, or floors are opened up during a renovation, contractors often focus on the visible finishes and miss the critical air sealing step before closing everything back up. Even well-intentioned work — like adding pot lights, running new electrical, or upgrading insulation — can actually make drafts worse if air sealing isn't addressed. In older Toronto homes (think century homes in The Annex or Leslieville, or post-war bungalows in Scarborough and Etobicoke), the original construction had almost no intentional air barrier to begin with, so opening walls can dramatically increase air leakage.

The most common culprits are pot light penetrations through the ceiling (each one is essentially a hole into your attic), new electrical boxes in exterior walls, gaps around plumbing or HVAC rough-ins, and disturbed weatherstripping around doors or windows. If your renovation involved the basement or attic, those are also prime suspects — the "stack effect" means cold air enters low and warm air escapes high, so any new gaps at those levels are felt throughout the whole house.

Toronto-specific context matters here. Ontario Building Code (OBC) Section 9.25 requires a continuous air barrier in new construction, but renovation work in existing homes often falls into grey areas. If your contractor pulled a permit, the inspector should have flagged major air sealing deficiencies — but inspectors don't catch everything. Toronto winters are unforgiving, and even small gaps become very noticeable once temperatures drop below -10°C.

The best diagnostic tool is a blower door test, performed by an energy auditor. This pressurizes your home and pinpoints exactly where air is leaking. The test typically costs $300–$600 in the GTA and is absolutely worth it before you start randomly caulking things. Many homeowners are surprised to find the biggest leaks are in unexpected places. Enbridge's Home Efficiency Rebate Plus program and Canada Greener Homes can offset both the audit cost and subsequent air sealing work.

If the renovation was recent, go back to your contractor first. Air sealing is part of proper renovation practice, and a reputable contractor should address it. Document the drafts, note where you feel them, and have a direct conversation before spending money on repairs yourself.

If you need to find a qualified contractor to assess and fix the issue, browse the professionals listed in the Toronto Construction Network directory — look for contractors with experience in building envelope work or energy efficiency upgrades. A proper fix typically runs $500–$2,500 depending on how much access is needed and how many penetrations need sealing.