What does vapour barrier install typically cost in New Brunswick?

Vapour barrier installation in New Brunswick typically runs $0.75-$2.50 per square foot, depending on the type of barrier, accessibility, and whether it's part of a larger insulation project. For an average 1,200 sq ft home, expect total costs of $900-$3,000.

Material costs break down to $0.25-$0.75 per square foot for the barrier itself. Standard 6-mil polyethylene sheeting costs around $0.25/sq ft, while premium vapor barriers with better tear resistance run $0.50-$0.75/sq ft. Labour adds another $0.50-$1.75/sq ft, with the wide range reflecting job complexity and contractor experience.

The type of installation significantly affects pricing. New construction vapor barrier work during framing is the most economical at $0.75-$1.25/sq ft since walls are open and accessible. Retrofit installations in finished basements or attics cost $1.50-$2.50/sq ft due to the extra work of removing and replacing drywall or other finishes.

Accessibility challenges common in New Brunswick's older housing stock drive up costs. Victorian-era homes in Fredericton's downtown or Saint John's South End often have tight spaces, irregular framing, and existing knob-and-tube wiring that complicates installation. Rural properties may face delivery surcharges that add $100-$300 to material costs.

Under the National Building Code 2020 (effective May 1, 2025 for new applications in NB), vapor barriers must be installed on the warm side of insulation in heated spaces. The code requires continuous coverage with sealed joints and penetrations. While homeowners can legally install vapor barrier themselves, the work requires careful attention to air sealing - poorly installed barriers can actually trap moisture and cause bigger problems.

Most contractors bundle vapor barrier with insulation upgrades, which can reduce the per-square-foot cost. A complete basement insulation and vapor barrier project typically runs $3-$6 per square foot total. NB Power's Total Home Energy Savings Program may offer rebates for insulation upgrades that include proper vapor barrier installation.

Get quotes from at least three contractors in our directory, and ensure they understand NBC requirements for your specific application. Ask specifically about their air sealing techniques around electrical boxes and penetrations - this detail work separates quality installations from problem jobs.