Question 1

Is spray foam worth it in an old Saint John basement?

Accepted Answer

Spray foam is one of the best investments you can make in an old Saint John basement — but the right type and location matters enormously. Saint John's unique combination of Bay of Fundy humidity, coastal salt air, freeze-thaw cycles, and the notoriously wet soils around the peninsula make moisture management the number one priority in any basement insulation project.

Most older Saint John homes — particularly in the South End, Uptown, and North End — were built in the Victorian and Edwardian e

Question 2

Do heat pumps keep up through a northern New Brunswick cold snap?

Accepted Answer

Cold-climate heat pumps can keep running through a northern New Brunswick cold snap, but they are designed to work with backup heat, not instead of it.

Every air-source heat pump has a minimum operating temperature. Natural Resources Canada says that for newer models "this can range from between -15°C to -25°C," and that "below this temperature, a supplemental system must be used to provide heating to the building." Cold-climate models go further: NRCan says "cold climate heat pumps work in tem

Question 3

Which decking lasts longest through New Brunswick freeze-thaw?

Accepted Answer

Composite decking with capped polymer boards is your best bet for New Brunswick's brutal freeze-thaw cycles — properly installed, quality composite can last 25-30 years with minimal maintenance, outperforming most other options in our climate.

Here's the core problem with NB winters: we don't just get cold, we get repeated freeze-thaw events throughout the season. Temperatures swing from -25°C to above freezing multiple times each winter, and any material that absorbs water will eventually crac

Question 4

What insulation suits a New Brunswick attic to stop ice dams?

Accepted Answer

Blown-in cellulose or fiberglass at R-60 is your best defence against ice dams in a New Brunswick attic — and the fix is almost always more insulation combined with better air sealing, not just adding more material on top of what's there.

Ice dams form when heat escapes through your ceiling, warms the roof deck, melts snow, and that meltwater refreezes at the cold eaves. The root cause is almost never the insulation material itself — it's insufficient depth and, critically, air leaks around pot

Question 5

Which siding survives salt air on the New Brunswick coast?

Accepted Answer

Coastal NB is one of the toughest environments for exterior cladding in Canada — but a few materials genuinely hold up. The combination of Bay of Fundy salt spray, fog, freeze-thaw cycling, and driving wind narrows your best options considerably.

Fibre cement (HardiePlank and similar) is the top performer for most coastal NB homes. It doesn't rot, won't corrode, and holds paint well even in salt-laden air. Expect to pay $8–$14 per square foot installed in the Saint John or Shediac area. The cri

Question 6

What's the best underlayment for hardwood flooring on a concrete slab in a New Brunswick basement where moisture is always a concern?

Accepted Answer

For basement concrete slabs in New Brunswick, you absolutely need a moisture barrier underlayment system — our high water tables, spring thaw, and clay soils make basement moisture management critical.

The best approach is a two-layer system: start with a 6-mil polyethylene vapor barrier directly on the concrete, sealed at seams with acoustic sealant or vapor barrier tape. Over this, install a premium underlayment like Bostik's MVP or similar closed-cell foam with integrated moisture barrier. T

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