How much do contractors charge for crawlspace encapsulation in New Brunswick?

Crawlspace encapsulation in New Brunswick typically runs $3,000–$12,000+, with most homeowners spending $4,500–$7,500 for a standard-sized crawlspace. The wide range reflects real differences in crawlspace conditions, size, and how much prep work is needed before the vapour barrier even goes down.

Here's how the pricing breaks down across the province:

• Basic encapsulation (clean, dry crawlspace, 6-mil poly vapour barrier, taped seams): $3,000–$5,000
• Mid-range (20-mil reinforced barrier, insulated walls, drainage matting, basic ventilation sealing): $5,000–$8,000
• Full encapsulation (heavy-duty liner, rigid foam insulation on walls and rim joists, dehumidifier, sump pump if needed, sealed vents): $8,000–$12,000+

What drives the cost up fast in New Brunswick homes is the condition of the existing crawlspace. Older homes — especially post-war bungalows in Moncton, Fredericton, and Saint John built in the 1950s–70s — often have crumbling concrete block walls, deteriorated wood, standing water, or old fibreglass batt insulation hanging from the floor joists that needs to be removed first. Demo and remediation can add $500–$2,000 before encapsulation even starts. If there's mould present (common in NB crawlspaces given our wet springs and high water tables), professional remediation adds another $1,500–$4,000.

One thing NB homeowners often overlook is radon. New Brunswick has some of the highest radon levels in Canada — roughly 1 in 4 homes exceed Health Canada's guideline of 200 Bq/m³. A properly sealed crawlspace is actually one of your best defences against radon entry, but only if it's done right. If you haven't tested yet, pick up a long-term test kit ($30–$50) before finalizing your encapsulation plan — your contractor should know whether to incorporate a passive or active sub-membrane depressurization system into the job. Adding that system during encapsulation costs far less than retrofitting it later ($500–$1,500 integrated vs. $2,500–$5,000 standalone).

NB Power rebates may apply if your encapsulation includes insulation upgrades to the crawlspace walls or rim joists — worth asking your contractor about the Total Home Energy Savings Program before signing anything.

On the permit side: encapsulation alone (vapour barrier and insulation) typically doesn't require a building permit, but if the scope includes structural repairs, drainage modifications, or changes to your foundation, check with your local municipality or Regional Service Commission. If you're in Moncton, that's the City's Planning & Development office at (506) 856-4375; rural areas around Shediac or the Dieppe outskirts fall under RSC 7 (Plan360) at (506) 533-3637.

This is firmly a hire-a-pro job. The vapour barrier needs to be properly lapped, sealed at penetrations, and fastened to walls — gaps and poor sealing defeat the entire purpose and can actually trap moisture. A licensed contractor will also spot issues like deteriorating sill plates or inadequate drainage that a DIYer might miss.

Browse encapsulation contractors in our directory at New Brunswick Construction Network to find local professionals who know NB crawlspace conditions firsthand.