How much extra does cold weather concrete work cost in NB?

Cold weather concrete work in New Brunswick typically adds 25-40% to the base cost of a standard pour, and in severe conditions or for complex projects, the premium can reach 50% or more. These costs are real and unavoidable — cutting corners on cold weather protection to save money leads to concrete failure that costs far more to fix than the protection would have.

The premium breaks down into several categories. First, the concrete mix itself costs more in cold weather. Hot water must be added to the mix at the plant (additional charge from the ready-mix supplier), and accelerating admixtures — calcium chloride or non-chloride alternatives — add $10-$25 per cubic yard. High-early-strength cement blends that gain strength faster cost $20-$40 more per cubic yard than standard mixes. On a typical driveway pour of 5-7 cubic yards, mix modifications alone add $150-$450.

Heating and protection equipment is the largest cold weather cost. Insulating curing blankets rent for $1-$3 per square foot per week — for a 500-square-foot driveway, that's $500-$1,500 per week in blanket rental. Heated enclosures using propane or electric salamander heaters add $100-$300 per day in fuel and equipment costs. Propane heating for a typical residential cold weather pour over a 3-7 day protection period can add $300-$700 in fuel alone. Electric heated curing blankets are more energy-efficient but have higher equipment costs.

Labour costs increase because cold weather work requires monitoring — someone checking concrete temperatures every 4-6 hours for the first 48-72 hours to ensure the concrete doesn't freeze or overheat (yes, both are problems). That monitoring time is billable, especially for evening and overnight checks. Contractors also work more slowly in cold conditions: gloves, bulky clothing, and stiff materials all reduce productivity.

Ready-mix timing becomes more expensive in cold weather. Concrete must be placed quickly before heat loss occurs, which may require a concrete pump (add $400-$800 for pump rental) if the truck can't get close enough to the pour area. Short load surcharges of $75-$150 apply for small orders.

As a rough guide for NB residential projects: a driveway that would cost $5,000 in June might cost $6,500-$7,500 if poured in November under cold weather conditions. A foundation pour that would be $20,000 in optimal conditions might reach $26,000-$28,000 in December. These premiums reflect real costs — ask your contractor to break down the cold weather surcharges itemized in the quote so you understand exactly what you're paying for.