Question 1

How much does it cost to insulate a 600 sq ft addition on a Riverview NB home including wall, attic, and floor insulation with permits?

Accepted Answer

A 600 sq ft addition in Riverview will typically cost $4,500-$9,500 for complete insulation including walls, attic, and floor, plus $300-$800 for building permits. The wide range depends on insulation types chosen, foundation design, and whether you're building over a basement, crawl space, or slab-on-grade.

Wall Insulation Costs
For a 600 sq ft addition, you're looking at roughly 400-500 sq ft of exterior wall area (assuming 8-foot ceilings). Standard 2x6 wall construction with R-22 fibreglass

Question 2

Can I install exterior wall insulation on my Moncton home myself during a renovation or is this strictly a contractor job?

Accepted Answer

Exterior wall insulation can be a DIY project for experienced renovators, but it requires significant building science knowledge and carries high stakes for moisture management mistakes. Whether you should tackle it yourself depends on the specific method, your skill level, and your comfort with complex building envelope work.

DIY-Friendly Exterior Insulation Approaches

If you're already planning to replace your siding, adding rigid foam board insulation over the existing sheathing is the most

Question 3

What is the best way to insulate a shared wall in a Fredericton duplex? | Insulation IQ?

Accepted Answer

Insulating a shared wall — also called a party wall — in a Fredericton duplex serves two distinct purposes that are easy to conflate but require different approaches: thermal performance and sound attenuation. If the duplex is a side-by-side unit where the shared wall separates two conditioned spaces, heat loss through that wall is minimal because both sides are typically heated to similar temperatures. The dominant concern in that scenario is sound transmission between units. If, however, one s

Question 4

How much wall insulation is needed for a two-storey home in Grand Falls NB? | Insulation IQ?

Accepted Answer

Grand Falls (Grand-Sault) sits in the upper Saint John River valley in a region of New Brunswick that experiences some of the province's most demanding winters — temperatures regularly reaching -25°C or colder during January cold snaps, with the community firmly in Climate Zone 6 under the National Energy Code for Buildings. For a two-storey home in Grand Falls, getting wall insulation right means understanding both the minimum code requirements and the practical performance standards that actua

Question 5

Does adding exterior wall insulation change the look of my NB home? | Insulation IQ?

Accepted Answer

This is one of the most honest and practical questions a New Brunswick homeowner can ask before committing to an exterior continuous insulation retrofit — and the equally honest answer is: yes, it does change the look of your home, but the degree of change depends heavily on how the project is managed and what your home looks like to begin with.

When rigid foam or mineral wool board is installed over existing wall sheathing before new cladding goes on, the wall assembly gets physically thicker.

Question 6

How do I prevent thermal bridging in wall studs in a Tracadie NB home? | Insulation IQ?

Accepted Answer

Thermal bridging is one of the most underappreciated heat-loss problems in New Brunswick homes, and it's especially significant in Climate Zone 6 communities like Tracadie. A standard 2x6 stud wall filled with R-20 batt insulation doesn't actually deliver R-20 performance — the wooden studs themselves conduct heat far better than the insulation between them, reducing the effective whole-wall R-value to somewhere around R-14 to R-16 once you account for studs, top plates, headers, and corners. In

Question 7

Can I use spray foam to insulate walls in a log home in rural New Brunswick? | Insulation IQ?

Accepted Answer

Log homes present one of the most distinctive insulation challenges in New Brunswick's rural landscape, and the question of whether spray foam belongs in or around a log wall requires some careful thinking before you commit to any product. The short answer is: spray foam has a limited and specific role in log home insulation — and using it carelessly can cause serious, expensive damage.

The fundamental nature of a log wall is that it is a solid-mass construction, not a stud-framed cavity wall.

Question 8

What is the difference between insulating from inside vs outside walls in NB? | Insulation IQ?

Accepted Answer

When a New Brunswick homeowner decides to improve wall insulation, they face a fundamental choice that shapes the entire project: add insulation from the interior or from the exterior. Both approaches are legitimate and widely used across NB, but they have profoundly different costs, disruption levels, impacts on moisture management, and effectiveness at addressing thermal bridging. Understanding the trade-offs helps you choose the right strategy for your home and budget.

Interior wall insulati

Question 9

How do I know if my walls have any insulation in an older Sackville home? | Insulation IQ?

Accepted Answer

Sackville is one of New Brunswick's older communities, and many of its homes — particularly the century-old houses near Mount Allison University and along streets built during the town's earlier commercial era — were constructed at a time when wall insulation was minimal or completely absent. Knowing what is in your walls before you spend money on heating or plan a renovation is genuinely useful, and there are several reliable ways to find out.

The simplest starting point is a visual inspection

Question 10

Can I blow insulation into my wall cavities through small holes in Saint John NB? | Insulation IQ?

Accepted Answer

Yes — blowing insulation into existing wall cavities through small holes is a well-established retrofit technique used widely in older Saint John homes and throughout New Brunswick. It's called dense-pack insulation when done properly, and when executed correctly it's one of the most cost-effective ways to improve the thermal performance of an older home without a major interior or exterior renovation.

The most common materials used for this application are blown-in fibreglass (such as Spider o

Question 11

How do I insulate around windows and doors in my Woodstock NB home? | Insulation IQ?

Accepted Answer

Insulating around windows and doors is one of the highest-impact air-sealing tasks you can tackle in a Woodstock home. The gaps between a window or door frame and the rough framing opening behind it are notorious infiltration points — on a cold January day when temperatures drop to -25°C, unaddressed gaps here allow frigid outdoor air to bypass your wall insulation entirely, driving up heating bills and making rooms beside exterior walls feel perpetually cold.

The primary material for filling t

Question 12

Is exterior rigid foam insulation effective on New Brunswick homes? | Insulation IQ?

Accepted Answer

Exterior rigid foam insulation is one of the most effective upgrades you can make to a New Brunswick home — and it's significantly underused compared to its performance potential. For a province sitting squarely in climate zone 6, where heating degree-days in Fredericton, Moncton, and Saint John consistently exceed 4,400, the thermal performance gains from continuous exterior insulation are substantial and well-supported by building science.

The fundamental advantage of exterior rigid foam is t

Question 13

What R-value should exterior walls have in New Brunswick according to code? | Insulation IQ?

Accepted Answer

Understanding what the New Brunswick Building Code actually requires for exterior wall insulation — and how that compares to what performs well in the province's climate — is essential knowledge for any renovation or new construction project. The short version: code sets a minimum floor, not a performance target, and most building professionals recommend exceeding it significantly.

New Brunswick adopts the National Building Code of Canada (NBC) with provincial amendments. Under the NBC 2015 (an

Question 14

Should I insulate interior walls between rooms in my Moncton home? | Insulation IQ?

Accepted Answer

Interior wall insulation is one of those improvements that most Moncton homeowners never think about — and yet it can make a meaningful difference to both comfort and energy use depending on your home's layout and how you use each space. The short answer is: it depends on what you're trying to achieve, but in many cases it's absolutely worth doing.

The most compelling reason to insulate interior walls is acoustic separation. Moncton homes built before the 1990s were rarely constructed with soun

Question 15

How do I insulate a knee wall in my New Brunswick Cape Cod style home? | Insulation IQ?

Accepted Answer

Cape Cod style homes are extremely common across New Brunswick — from the tree-lined streets of Fredericton to the older residential neighbourhoods of Saint John and Moncton. Their charming roofline comes with a structural quirk that creates one of the most persistently cold and energy-wasting areas in any home: the knee wall. Getting this right requires understanding how heat, air, and moisture move through this unique assembly.

A knee wall is the short vertical wall — typically 1.2 to 1.5 met

Question 16

Can I add insulation to existing walls without removing drywall in NB? | Insulation IQ?

Accepted Answer

Yes — in most cases you can add insulation to existing walls in New Brunswick without touching the drywall, and this is actually the most practical approach for the majority of retrofit projects across the province. The technique is called dense-pack injection (or blown-in wall insulation), and it has become the standard method for upgrading wall cavities in older Moncton, Fredericton, and Saint John homes without gut-level renovation.

Here is how the process works. A contractor locates each st

Question 17

What is the best insulation for 2x4 walls in older New Brunswick homes? | Insulation IQ?

Accepted Answer

Older New Brunswick homes — those built before the 1980s in particular — typically have 2x4 exterior wall framing, giving you a stud cavity of only 3.5 inches to work with. That physical constraint shapes every insulation decision you make, and choosing the right product matters both for thermal performance and for managing moisture in a climate zone 6 environment.

The most important thing to understand upfront: 3.5 inches of cavity can never get you to the R-17.5 effective wall performance the

Question 18

How much does it cost to insulate exterior walls in a Fredericton home? | Insulation IQ?

Accepted Answer

Exterior wall insulation in Fredericton is one of the most impactful upgrades you can make to an older home, and the cost varies considerably depending on the approach, the home's size, and the existing wall construction. Here is a realistic breakdown of what homeowners in the Fredericton area are seeing in 2025–2026.

The main methods and their costs:

Blown-in dense-pack insulation through the exterior or interior is the most common retrofit approach in New Brunswick for existing walls. A cont