Air sealing is the most cost-effective first step to a more comfortable, efficient Ottawa home. Insulation resists heat flow, but it doesn't stop air movement — if cold air is leaking in through gaps around your attic hatch, plumbing penetrations, electrical boxes, and rim joists, your insulation can't do its job.
The average Ottawa home has air leaks that add up to the equivalent of a basketball-sized hole in the wall. Sealing them stops drafts, reduces heating and cooling costs, prevents moisture problems, and improves indoor air quality — and it makes any insulation you add work properly.
We use a blower door test to measure your home's air leakage before and after sealing, so you see the improvement in numbers. Air sealing is the right first step before adding insulation, and it pairs perfectly with spray foam, rim joist, and crawlspace projects.
A Local Challenge We Understand
Ottawa's wide temperature range and windy winters make air sealing especially valuable. Older homes in the Glebe, Old Ottawa East, Centretown, and Vanier have decades of settling, retrofits, and wear that create air leaks. Even newer homes in Kanata, Barrhaven, and Orléans often have leaky attic hatches, plumbing penetrations, and rim joists that were never properly sealed. A blower door test shows exactly where yours are.
What You Get
The benefits our Ottawa customers see from this service.
How It Works
A clear, step-by-step process — no surprises.
Blower door test
We depressurize your home with a blower door to measure total air leakage and locate the biggest leaks.
Seal the big leaks
We seal attic penetrations, plumbing and electrical holes, the attic hatch, and rim joist gaps with foam, caulk, and weatherstripping.
Re-test & verify
We run the blower door again to measure the improvement and confirm the leaks are sealed.
Recommend next steps
We advise whether added insulation will now perform well, or whether more sealing is worthwhile.
Ottawa air sealing services we provide
Searches Ottawa homeowners use to find this service — and what we deliver.
Frequently Asked Questions
Straight answers to the questions Ottawa homeowners ask us.
How do I know if my home needs air sealing?
Signs include drafts near windows, doors, or outlets, uneven room temperatures, high energy bills, and cold floors. A blower door test during your free assessment measures your air leakage precisely.
What is a blower door test?
A blower door is a sealed fan mounted in an exterior door frame. It depressurizes your home to measure how much air leaks in and to pinpoint where the leaks are. We test before and after sealing so you see the improvement.
Should I air seal before or after insulating?
Before. Air sealing first is the most effective approach — leaks undermine insulation. Once sealed, any insulation you add performs the way it should.
Will air sealing make my home too airtight?
No. We seal carefully and ensure proper ventilation (bathroom fans, HRV/ERV, or natural ventilation) is in place so your home stays healthy while becoming efficient.
How much does air sealing cost in Ottawa?
Most Ottawa air sealing projects range from $1,500 to $4,000 depending on home size and the extent of leaks. It's one of the fastest-payback efficiency upgrades available.