Frequently Asked Questions

Several warning signs indicate your NB home is under-insulated: **unusually high heating bills** compared to similarly sized homes in your area, **cold drafts or uneven temperatures** between rooms, **ice dams forming along your roof edges** in winter, and **frozen or cold interior walls** during January and February cold snaps. In New Brunswick's Maritime climate where winter temperatures regularly drop to -15°C to -25°C, inadequate insulation forces your heating system to work overtime and can account for 40-60% of total energy loss. A professional energy audit through NB Power's Total Home Energy Savings Program uses a blower door test and thermal imaging to pinpoint exactly where heat is escaping — often through the attic, exterior walls, rim joists, and basement headers. If your NB home was built before 1980, it almost certainly has insufficient insulation by modern standards, as building code requirements have increased substantially since then.

The R-value your NB home needs depends on the building component and whether you are renovating or building new. The **National Building Code of Canada**, which New Brunswick adopts with provincial amendments, specifies minimum R-values for Climate Zone 6 (which covers most of NB): **R-50 to R-60 for attics**, **R-22 to R-28 for above-grade exterior walls**, and **R-17 to R-20 for basement walls**. However, these are minimums — many NB energy efficiency experts recommend exceeding code requirements by 20-30% given the province's harsh Maritime winters and rising energy costs. For existing homes being retrofitted, adding insulation to reach even the minimum code values can reduce heating costs by 25-40%. If you are building new in NB, your builder must meet or exceed current NB Building Code requirements, and higher R-values qualify your home for additional NB Efficiency rebates and may be required for programs like ENERGY STAR certification.

In most New Brunswick homes, **the attic should be insulated first** because heat rises and an under-insulated attic is typically the single largest source of heat loss — responsible for 25-35% of total energy escaping from a typical NB home. Attic insulation is also the most cost-effective upgrade, with blown-in cellulose or fibreglass costing $1.50-$3.00 per square foot and often paying for itself within 3-5 years through heating savings. Walls are the second priority but are more expensive and disruptive to insulate, typically requiring either dense-pack injection from the exterior (drilling holes through the siding) or interior demolition to access the wall cavities. The exception is if your NB home already has reasonable attic insulation (R-30 or above) but has completely uninsulated walls — common in homes built before 1970 — in which case wall insulation delivers the bigger improvement. An energy audit will identify where the most heat is escaping and help you prioritize your insulation upgrades for maximum return on investment.

Installation timelines in NB vary by insulation type, area being insulated, and the size of the home. **Blown-in attic insulation** is the fastest project — a professional crew can insulate a standard 1,000-1,500 square foot NB attic in 3-6 hours, meaning most homes are completed in a single day. **Spray foam insulation** for a full basement or crawl space takes 1-2 days depending on the area and required thickness, plus time for proper ventilation and curing (typically 24 hours before the space should be reoccupied). **Exterior wall injection** (dense-pack cellulose or foam) for a full NB home takes 2-4 days as the crew must drill, fill, and patch each wall cavity section by section. **Batt insulation** in an exposed basement or new construction is moderately fast at 1-2 days for a full basement. Weather does not typically delay insulation work the way it does exterior construction, since most insulation is installed from inside the home or within the building envelope, making it an ideal winter project for NB homeowners. However, spray foam application requires ambient temperatures above 5°C in the work area, so unheated spaces may need temporary heat during NB's coldest months.

**Spray foam** and **blown-in** insulation serve different purposes and price points in NB homes. Spray foam comes in two types: **closed-cell** (R-6 to R-7 per inch), which also acts as a vapour barrier and air barrier, and **open-cell** (R-3.5 to R-4 per inch), which is softer, more affordable, and provides excellent air sealing but requires a separate vapour barrier. Spray foam excels at sealing air leaks in rim joists, basement headers, and irregular cavities — areas where NB's cold winter winds drive significant heat loss. **Blown-in insulation** (cellulose or fibreglass) is applied loose-fill into attics or dense-packed into wall cavities. It costs significantly less than spray foam ($1.50-$3.00/sq ft for blown-in attic versus $3.50-$8.00/sq ft for spray foam) and is the standard choice for topping up attic insulation to R-50 or R-60. For most NB homes, the best strategy combines both: spray foam at critical air sealing points (rim joists, attic hatch, penetrations) and blown-in insulation for the large-area coverage in attics and wall cavities. This hybrid approach delivers 80-90% of the performance of full spray foam at roughly half the cost.

Both fibreglass and mineral wool (also called rock wool or stone wool) perform well in New Brunswick homes, but mineral wool has advantages that are particularly relevant in the Maritime climate. **Mineral wool** (brands like Roxul/Rockwool) offers R-4.0 to R-4.2 per inch compared to fibreglass at R-3.0 to R-3.7 per inch, meaning you get more insulating power in the same wall cavity thickness. Mineral wool is also hydrophobic — it repels water and does not lose R-value when damp, an important advantage in NB where moisture management is a constant concern, especially in basements and exterior walls. It also provides superior sound dampening and is naturally fire-resistant up to 1,177°C without chemical fire retardants. **Fibreglass** batts are less expensive ($0.50-$1.00/sq ft versus $1.00-$1.75/sq ft for mineral wool), widely available at NB retailers like Kent Building Supplies and Home Depot, and familiar to all NB installers. Fibreglass is a perfectly adequate choice for dry interior walls and attic applications where moisture is well controlled. For NB basements, exterior walls, and any application where moisture exposure is possible, mineral wool is the better investment due to its moisture resistance and dimensional stability.

New Brunswick basements present unique insulation challenges due to the Maritime water table, seasonal moisture migration through concrete, and the need to prevent both heat loss and condensation. **Closed-cell spray foam** (2-3 inches providing R-12 to R-21) applied directly to basement concrete walls is considered the gold standard for NB basement insulation because it simultaneously provides insulation, a vapour barrier, and an air barrier in a single application — eliminating the condensation risk that plagues other methods. **Rigid foam board** (extruded polystyrene/XPS or polyisocyanurate) installed against the concrete walls with framed stud walls in front is a more affordable alternative at $2-$4 per square foot versus $4-$7 for spray foam. Use a minimum of 2 inches (R-10) and tape all seams to create a continuous vapour barrier. **Never install fibreglass batts directly against NB basement concrete walls** — moisture migrating through the concrete becomes trapped in the fibreglass, creating mould and rot behind the drywall. This was standard practice in NB basements for decades and is the leading cause of mould problems in finished basements across the province. The NB Building Code requires a minimum R-17 to R-20 for basement walls in new construction, and any renovation should aim to meet or approach this standard.

Several eco-friendly insulation options are available through NB suppliers and contractors. **Cellulose insulation** is the most widely used green option — made from 80-85% recycled newspaper treated with borate fire retardant, it is blown into attics and dense-packed into walls. It has an R-value of 3.5-3.8 per inch, comparable to fibreglass, and its production requires far less energy than manufacturing fibreglass or foam products. Cellulose is readily available from NB insulation contractors and is price-competitive with fibreglass. **Mineral wool** (Rockwool) is manufactured from basalt rock and recycled steel slag, contains no chemical fire retardants, and is fully recyclable at end of life. **Sheep's wool insulation** and **cotton batt insulation** (recycled denim) are niche options available through specialty NB suppliers, offering R-3.5 to R-3.8 per inch with excellent moisture management properties. **Soy-based spray foam** uses renewable soy oil to replace a portion of the petroleum-based polyol in traditional spray foam, reducing the carbon footprint by 20-30%. When evaluating eco-friendliness, consider the full lifecycle: cellulose and mineral wool have the lowest embodied energy, while spray foam's superior air-sealing performance may reduce lifetime heating energy consumption enough to offset its higher manufacturing footprint, especially in NB's cold climate where heating accounts for the majority of a home's energy use.

Insulation upgrades can significantly reduce heating costs in NB, where the average household spends $2,500-$4,000 annually on heating fuel (oil, natural gas, electric, or heat pump). **Upgrading attic insulation** from R-20 to R-50 or R-60 typically reduces heating costs by 15-25%, saving $400-$1,000 per year depending on your heating fuel and home size. **Insulating previously uninsulated basement walls** saves an additional 10-20% on heating, as below-grade concrete is a major heat sink during NB's 6-month heating season. **Air sealing combined with insulation** (sealing gaps at rim joists, electrical penetrations, plumbing stacks, and the attic hatch) can reduce total heat loss by 25-40%, translating to $600-$1,600 in annual savings for a typical NB home. For a complete insulation retrofit of an older NB home — attic, walls, and basement — total heating savings of 30-50% are achievable, with the investment paying for itself in 5-8 years. These savings are particularly impactful in NB where heating season runs from October through April, with January and February heating bills often exceeding $500 per month in poorly insulated homes.

Yes, New Brunswick offers several rebate programs that can offset a significant portion of insulation upgrade costs. **NB Power's Total Home Energy Savings Program** provides rebates for insulation improvements in electrically heated homes, including attic insulation top-ups, wall insulation, and basement insulation. An energy evaluation (pre- and post-upgrade) is typically required to qualify. **The Canada Greener Homes Grant** (federal program) offers up to $5,000 in rebates for home energy retrofits including insulation, with a $600 pre-retrofit energy audit reimbursement. Insulation upgrades qualify for $500-$1,800 depending on the component insulated and the improvement achieved. **Enbridge Gas New Brunswick** offers rebates for insulation upgrades in natural gas-heated homes in the Moncton, Fredericton, and Saint John service areas. To maximize your rebate value, always schedule an energy evaluation BEFORE starting insulation work — most programs require a pre-upgrade assessment to establish baseline performance, and work done before the evaluation may not qualify. Your NB insulation contractor should be familiar with current rebate programs and can help you navigate the application process. Rebate programs change periodically, so confirm current offerings directly with NB Power, the federal government's housing programs, or your energy utility before committing to a project.

An energy audit (also called an energy evaluation or home energy assessment) is a comprehensive inspection of your NB home's thermal performance by a certified energy advisor. The auditor uses a **blower door test** to depressurize the home and measure total air leakage, **thermal imaging** to identify insulation gaps and cold spots in walls, ceilings, and floors, and a detailed inspection of your heating system, windows, doors, and ventilation. The result is a report scoring your home's energy efficiency and prioritizing upgrades by cost-effectiveness — showing you exactly where insulation will deliver the biggest return. An energy audit costs $300-$500 in NB, though this fee is often reimbursed through rebate programs like the Canada Greener Homes Grant. **You should get an energy audit before insulating** for two reasons: first, most NB and federal rebate programs require a pre-upgrade audit to establish baseline performance and a post-upgrade audit to verify improvements — work done without the pre-audit may not qualify for rebates. Second, the audit prevents you from spending money on insulation in areas that are already adequate while missing the real problem areas. Many NB homeowners are surprised to learn that air leakage, not insulation thickness, is their home's biggest energy problem — and air sealing is often cheaper and more effective than adding insulation alone.

New Brunswick adopts the **National Building Code of Canada (NBC)** with provincial amendments, and the minimum insulation requirements depend on whether the project is new construction or a renovation. For **new construction** in NB (Climate Zone 6, which covers the entire province), the code requires minimum insulation values of approximately **R-50 to R-60 for attics/ceilings**, **R-22 to R-28 for above-grade exterior walls** (depending on assembly type), **R-17 to R-20 for below-grade basement walls**, and **R-31 for cathedral ceilings**. These values assume the insulation is installed continuously and without thermal bridging — in practice, wood-framed walls with studs every 16 inches lose 15-25% of their effective R-value through the framing, so the installed insulation must be higher than the effective target. For **renovations and retrofits**, the NB Building Code does not require you to bring an existing home up to current new-construction standards, but any insulation work undertaken must meet current code minimums for the component being improved. Your local NB building inspector can confirm the specific requirements for your project and municipality.

In most cases, **adding insulation to an existing NB home does not require a building permit** — topping up attic insulation, insulating basement walls, or injecting wall cavities are considered maintenance and energy improvement work that falls below the permit threshold. However, there are important exceptions. If the insulation project involves **structural modifications** (removing walls, altering roof framing, or reconfiguring spaces), a permit is required. If you are **finishing a basement** and the insulation is part of a larger renovation that includes framing, electrical, plumbing, or egress window installation, the overall project requires a permit. **New construction** always requires permits that include insulation inspection as part of the building envelope review. Some NB municipalities also require permits for spray foam insulation applied to exterior walls if it changes the wall assembly or affects the building's fire rating. Contact your local municipal building inspection office — requirements vary between NB municipalities, and a quick phone call confirms whether your specific project needs a permit. Even when a permit is not required, all insulation work should comply with the NB Building Code and follow manufacturer installation specifications.

The NB Building Code, based on the National Building Code of Canada, requires a minimum of **R-50 to R-60 for attic insulation** in new construction across the province (all of NB falls within Climate Zone 6). This translates to approximately **16-20 inches of blown-in cellulose** or **18-22 inches of blown-in fibreglass** to achieve the target R-value. Many older NB homes have only R-20 to R-30 in their attics — far below current standards and a major contributor to heat loss and high heating bills. When topping up existing attic insulation, the new material is blown directly over the old insulation (there is no need to remove existing insulation unless it is damaged or contaminated), and the total combined R-value should meet or exceed R-50. It is critical that attic insulation does not block soffit vents — proper baffles must be installed at the eaves to maintain airflow from the soffits to the ridge or roof vents. Blocked ventilation causes moisture buildup, ice dams, and potential roof sheathing rot — all common problems in NB's cold, humid winters. Your NB insulation contractor should install baffles as a standard part of any attic insulation project.

Yes, new construction in New Brunswick must meet the current edition of the **National Building Code of Canada** as adopted by the province, which includes comprehensive insulation and energy performance requirements. Beyond the minimum R-values for each building component, the NB code requires **continuous air barrier systems** to limit air leakage through the building envelope, proper **vapour barrier installation** on the warm side of the insulation to prevent moisture condensation within wall and ceiling assemblies, and **thermal bridging mitigation** at structural connections where framing penetrates the insulation layer. New NB homes must also demonstrate compliance through either a **prescriptive path** (meeting specific R-values for each component) or a **performance path** (using energy modelling software like HOT2000 to show the overall home meets or exceeds the energy target). Many NB builders now exceed code minimums to qualify for **ENERGY STAR** or **R-2000** certification, which can unlock additional NB Efficiency rebates and financing incentives. The NB Technical Safety Authority oversees building code compliance, and inspections at the framing/insulation stage are mandatory before drywall can be installed. Your NB builder and building inspector will confirm the specific requirements for your project's location and scope.

Insulation costs in NB vary significantly by material type, application area, and project complexity. **Blown-in attic insulation** (cellulose or fibreglass) is the most affordable option at $1.50-$3.00 per square foot to achieve R-50 to R-60, putting a typical 1,000 square foot NB attic at $1,500-$3,000. **Spray foam insulation** is the premium option: closed-cell spray foam runs $3.50-$7.00 per square foot for 2-3 inches of coverage, while open-cell spray foam costs $2.00-$4.00 per square foot. A full NB basement spray foamed with closed-cell typically costs $3,500-$7,000. **Batt insulation** (fibreglass or mineral wool) installed in open framing costs $1.00-$2.50 per square foot including labour — common for basement renovations and new construction. **Dense-pack wall injection** (cellulose blown into existing wall cavities) runs $2.50-$5.00 per square foot of wall area, with a full NB home costing $4,000-$8,000 depending on the number of exterior walls and accessibility. NB insulation labour rates run approximately 10-15% below major Canadian markets like Toronto and Vancouver. For a comprehensive whole-home insulation upgrade — attic, walls, and basement — budget $8,000-$18,000 depending on the home's size, existing insulation levels, and materials chosen.

Spray foam costs 2-3 times more than blown-in or batt insulation, but it delivers unique benefits that can justify the premium in specific NB applications. **Where spray foam is worth the cost:** rim joists and basement headers (the single most impactful air-sealing location in NB homes, where cold air infiltrates between the foundation and floor framing), basement walls (closed-cell foam provides insulation, air barrier, and vapour barrier in one application, eliminating the moisture-trapped-in-batts problem that plagues NB basements), and cathedral ceilings with limited cavity depth (spray foam's higher R-value per inch maximizes insulation in shallow rafter spaces). **Where spray foam may not be worth the cost:** large open attics where blown-in cellulose achieves R-50+ at a fraction of the price, and standard above-grade walls that can be effectively insulated with dense-pack cellulose or mineral wool batts with a separate air barrier. For a typical NB home, the **hybrid approach** is the best value: spray foam at critical air-sealing points (rim joists, basement headers, attic penetrations) costing $800-$2,000, combined with blown-in insulation for large-area coverage in the attic and walls. This delivers 85-90% of the performance of full spray foam at roughly 50-60% of the cost.

Insulation upgrades offer some of the strongest returns on investment of any home improvement in New Brunswick, largely because the province's long, cold heating season (October through April) means energy savings accumulate rapidly. **Attic insulation** delivers the fastest ROI: a $2,000-$3,000 attic top-up from R-20 to R-50 typically saves $400-$800 per year in heating costs, paying for itself in 3-5 years. **Basement insulation** with spray foam at $4,000-$7,000 saves $300-$600 per year, with a 7-12 year payback. **Full-home insulation retrofits** costing $10,000-$18,000 can save $1,000-$2,000 per year, breaking even in 7-10 years before factoring in rebates. When NB Power and federal rebates are applied — potentially covering $2,000-$5,000 of the project cost — payback periods drop by 2-3 years. Beyond direct energy savings, insulation upgrades increase NB home resale values: energy-efficient homes sell faster and command a 3-8% premium in the NB real estate market. Insulation also extends the lifespan of your heating system by reducing run time, prevents ice dam damage to your roof, and eliminates cold spots and drafts that reduce comfort. For NB homeowners heating with oil or propane — the most expensive heating fuels — the ROI is even stronger, with payback periods often 20-30% shorter than for homes with natural gas or electric heating.

Many NB insulation contractors and energy efficiency programs offer financing options to help homeowners manage the upfront cost of insulation upgrades. **NB Power** periodically offers on-bill financing for energy efficiency upgrades including insulation, allowing you to pay for the work through your monthly electricity bill with the expectation that energy savings offset the payments. **The Canada Greener Homes Loan** (federal program) provides interest-free loans up to $40,000 for qualifying energy retrofits, repayable over 10 years — insulation is one of the primary qualifying upgrades. **Local NB insulation contractors** sometimes offer their own payment plans, often 6-12 month interest-free financing through partnerships with financing companies, though terms vary by contractor. **Home equity lines of credit (HELOCs)** from NB banks and credit unions are commonly used for insulation projects, offering lower interest rates than unsecured loans because the financing is secured against your home. When evaluating financing, compare the interest cost against the annual heating savings — in many cases, the monthly energy savings from insulation upgrades exceed the monthly financing payments, making the project cash-flow positive from day one. Always confirm current rebate eligibility before choosing a financing path, as combining rebates with low-interest financing maximizes the financial return on your insulation investment.

Insulation lifespan varies significantly by material type and installation quality, but most insulation products are designed to last the lifetime of the home when properly installed and protected from moisture. **Fibreglass batts and blown-in fibreglass** last 80-100 years without degrading, though they can lose effectiveness if they become compressed, displaced, or wet. In NB attics, wind washing (air movement displacing loose-fill insulation at the eaves) and vermiculite settling can reduce coverage over time, requiring periodic top-ups every 15-25 years. **Cellulose blown-in insulation** lasts 50-80 years and settles approximately 15-20% in the first few years after installation — reputable NB installers account for this settling by installing extra depth. **Closed-cell spray foam** lasts 80-100+ years with no degradation, settling, or loss of R-value, making it a true install-once solution. **Open-cell spray foam** lasts 50-80 years under normal conditions. **Mineral wool** lasts 80-100 years and is particularly durable in NB's humid conditions because it does not absorb moisture. The primary threats to insulation longevity in NB homes are **water damage** (roof leaks, ice dam backups, basement flooding), **pest intrusion** (mice nesting in fibreglass batts is common in rural NB), and **renovation disturbance**. Inspect attic insulation every 3-5 years and after any severe storm or ice dam event.

Certain types of old insulation found in NB homes can pose health risks and should be assessed by a qualified professional. **Vermiculite insulation** (small, grey-brown granular material often found in attics of NB homes built between 1940 and 1990) may contain tremolite asbestos if it originated from the Libby, Montana mine — the source of approximately 70% of North American vermiculite. Do not disturb vermiculite insulation; have it tested by a certified NB environmental consultant before any renovation work. If asbestos is confirmed, removal must be performed by a licensed abatement contractor following WorkSafeNB regulations. **Urea-formaldehyde foam insulation (UFFI)** was injected into wall cavities of thousands of NB homes in the 1970s. While Health Canada has stated that UFFI in existing homes is not a significant health risk after the initial curing period, it can concern NB home buyers and may need to be disclosed during a sale. **Fibreglass insulation** can cause skin, eye, and respiratory irritation during handling and installation, but is not considered a long-term health hazard once installed behind walls or in enclosed attic spaces. **Mould growth on or behind insulation** is the most common insulation-related health concern in NB homes — particularly in basements where fibreglass batts were installed directly against concrete walls, trapping moisture. If you discover mould, address the moisture source first, then have the affected insulation removed and replaced with a moisture-appropriate material like closed-cell spray foam or rigid foam board.

Poor insulation reveals itself through several telltale signs that are especially noticeable during New Brunswick's cold winters. **High heating bills** that seem disproportionate to your home's size and heating system are the most common indicator — if your NB home costs significantly more to heat than neighbours with similar homes, insulation is likely the culprit. **Cold walls, floors, and ceilings** that feel noticeably cooler than the indoor air temperature indicate insufficient insulation in those assemblies — hold your hand near an exterior wall on a cold NB January day, and you should not feel cold radiating from the surface. **Ice dams** (thick ridges of ice along roof edges that cause water to back up under shingles) are a classic sign of attic insulation and ventilation problems — warm air escaping through the attic melts snow on the roof, which refreezes at the colder eaves. **Drafts and uneven temperatures** between rooms, especially rooms over garages or cantilevers, indicate insulation gaps or air leaks. **Frozen pipes in exterior walls** during extreme NB cold snaps suggest the wall cavity is poorly insulated. **Condensation or frost on interior windows** can indicate that the building envelope is so leaky that warm, moist indoor air is reaching cold surfaces faster than the heating system can compensate. If you notice several of these signs, schedule an energy audit to quantify the problem and identify the most cost-effective insulation upgrades for your NB home.