What Is a Cold Cellar? (And Why GTA Homes Have Them)

A cold cellar — also called a cold room, root cellar or, in many Italian-Canadian households, a cantina — is the unheated concrete room built under the front porch of a house. It sits outside the home's insulated envelope on purpose: the surrounding soil and uninsulated concrete keep it naturally cool year-round, somewhere between a refrigerator and the rest of your basement.

Why do homes in the Greater Toronto Area have cold cellars?

When builders pour a concrete front porch, the space underneath would otherwise be wasted fill. Enclosing it creates free, naturally refrigerated storage — a feature especially loved in Toronto, Vaughan and Woodbridge, where generations of families have used the cantina to store preserves, wine, sauce, curing meats and root vegetables. Most homes built in the GTA from the 1960s onward include one.

What is a cold cellar used for?

• Preserves and canning — tomato sauce, pickled vegetables, jams
• Wine and beer storage — stable, cool and dark
• Root vegetables — potatoes, onions, squash, apples
• Overflow pantry — pop, water, bulk dry goods

For what to store (and what to keep out), see our guide on what you can store in a cold cellar.

The catch: cold cellars and moisture

The same thing that makes a cold cellar cold makes it damp. The room's concrete ceiling is the underside of your porch — exposed to rain, snow and de-icing salt from above. Its walls sit against soil. And every time warm, humid air from the house leaks in through the cellar door, it hits the cold concrete and condenses, like a cold drink sweating on a summer day.

Left alone, that moisture causes dripping condensation, white mineral stains called efflorescence, peeling paint, rusted door frames and mould. This is the single most common problem with cold cellars in the GTA — and it's exactly the problem Cold Cellar Pro exists to fix.

How to keep a cold cellar healthy

• Keep the cellar door well-sealed and insulated on the basement side
• Make sure porch drainage and downspouts carry water away from the slab
• Don't block the vent if your cellar has one — airflow matters
• If the room already drips, stains or smells musty, it needs restoration — not another coat of paint

If your cold cellar is already showing damage, our six-step restoration system seals leaks at the source, repairs the concrete and refinishes the room with coatings made for cold, humid, below-grade spaces. We serve the entire GTA — see if we cover your city.