Question 1

Does the extreme cold in northern New Brunswick around Edmundston require a higher-density batt insulation than what is used in Moncton?

Accepted Answer

No, the extreme cold in northern New Brunswick does not require higher-density batt insulation than what's used in Moncton — but it does require higher R-values, which means thicker insulation assemblies rather than denser batts.

The density of batt insulation (measured in pounds per cubic foot) is determined by the manufacturing process and material type, not the climate zone. A standard R-20 fibreglass batt has the same density whether it's installed in Edmundston or Moncton — roughly 0.5 to

Question 2

How do I prevent gaps and voids when installing batt insulation in a Woodstock home? | Insulation IQ?

Accepted Answer

Gaps and voids in batt insulation are one of the most common — and most damaging — installation mistakes in residential construction. A single air gap as small as 1% of the insulated area can reduce the effective thermal performance of a wall assembly by 50% or more, because heat moves through air much faster than through insulation fibres. In a Woodstock home facing Climate Zone 6 winters where temperatures regularly drop below -20°C, those gaps translate directly into higher heating bills, col

Question 3

What PPE do I need when handling fibreglass batt insulation in NB? | Insulation IQ?

Accepted Answer

Handling fibreglass batt insulation without proper personal protective equipment is genuinely uncomfortable and can cause both short-term and long-term health issues. The tiny glass fibres that give fibreglass insulation its thermal properties are also exactly what make it irritating to skin, eyes, and the respiratory system. Before you unroll a single batt in your New Brunswick home, it is worth spending five minutes understanding what protection you actually need.

Respiratory protection is th

Question 4

Is Roxul mineral wool worth the extra cost over fibreglass batts in Campbellton NB? | Insulation IQ?

Accepted Answer

For homeowners in Campbellton — one of New Brunswick's colder subregions, with a climate that regularly sees heavy snowfall and extended periods well below -20°C — the question of mineral wool versus fibreglass is a genuinely important one. The short answer is that Roxul (now marketed as Rockwool) mineral wool batts offer a meaningful set of advantages over standard fibreglass, and for many Campbellton applications, the extra cost is justified. But it depends on where you're installing it and wh

Question 5

Can I use batt insulation in a crawl space in New Brunswick? | Insulation IQ?

Accepted Answer

Technically, yes — batt insulation can be installed in a crawl space in New Brunswick. But whether you should depends heavily on the type of crawl space you have, how it is detailed, and whether you understand the serious moisture risks involved. In NB's Climate Zone 6 environment, getting crawl space insulation wrong is one of the most reliable ways to end up with a mould problem.

First, it is important to understand the two fundamentally different approaches to crawl spaces: vented crawl spac

Question 6

What size batts do I need for standard wall studs in New Brunswick framing? | Insulation IQ?

Accepted Answer

Selecting the right batt size for your wall framing is fundamental to achieving the thermal performance required by the NB Building Code — and it's a straightforward process once you understand how batt dimensions correspond to standard framing dimensions used across New Brunswick.

Standard framing in New Brunswick follows the same nominal lumber sizing used across Canada. The two most common wall assemblies are 2x4 and 2x6 stud walls. A 2x4 stud has an actual depth of approximately 3.5 inches,

Question 7

How much do R-24 fibreglass batts cost at building supply stores in Saint John? | Insulation IQ?

Accepted Answer

R-24 fibreglass batts are one of the most commonly purchased insulation products at building supply stores in Saint John and across New Brunswick, since they are the standard fill product for 2x6 exterior walls in new construction and major renovations. Prices have shifted noticeably since 2021 due to supply chain changes and material costs, so current figures matter when you're budgeting a project.

As of early 2026, R-24 fibreglass batts in the standard 15-inch wide, 47-inch length (for 16-inc

Question 8

How do I cut batt insulation to fit around electrical boxes in a Sussex home? | Insulation IQ?

Accepted Answer

Cutting batt insulation to fit neatly around electrical boxes is one of the most detail-oriented parts of insulating a wall cavity, and doing it correctly matters enormously for thermal performance. A poorly fitted batt around a box leaves air gaps that allow cold air infiltration — a real concern in Sussex and across New Brunswick, where winter temperatures can drop well below -20°C and every gap in your thermal envelope translates directly into higher heating bills.

The standard approach is c

Question 9

Does compressing batt insulation reduce its R-value in NB construction? | Insulation IQ?

Accepted Answer

Yes — compressing batt insulation does reduce its R-value, and this is a critically important concept for New Brunswick homeowners and builders to understand, particularly because NB's Climate Zone 6 designation demands that walls, floors, and attics actually deliver the rated thermal resistance they're supposed to provide.

Why compression reduces R-value comes down to the physics of how batt insulation works. Fibreglass and mineral wool batts trap still air within their fibre matrix. That trap

Question 10

Is mineral wool batt insulation better than fibreglass for New Brunswick homes? | Insulation IQ?

Accepted Answer

Mineral wool batt insulation — sold under brand names like Rockwool (formerly Roxul) and Thermafiber — offers several meaningful performance advantages over standard fibreglass batts, and those advantages are particularly relevant to New Brunswick's cold, damp climate. That said, fibreglass still has a strong case in the right applications. The honest answer is that neither is universally better — the right choice depends on where you're insulating and what your priorities are.

Where Mineral W

Question 11

What R-value batt insulation do I need for 2x6 walls in NB? | Insulation IQ?

Accepted Answer

In New Brunswick, 2x6 wall framing is the current standard for exterior walls in residential construction, and it's used specifically because it accommodates higher R-values than the older 2x4 standard. Understanding what R-value is required — and what is simply achievable — is important for both code compliance and long-term energy performance.

New Brunswick has adopted the National Building Code of Canada 2020 (NBC 2020), which places NB in Climate Zone 6. For above-grade opaque walls in new

Question 12

Can I install batt insulation over existing insulation in my Moncton home? | Insulation IQ?

Accepted Answer

Yes, in most cases you can install new batt insulation over existing insulation in a Moncton home — but whether it's the right approach, and exactly how to do it correctly, depends on what's already there, where it's located, and the condition it's in.

The most common scenario is attic top-up insulation: an older home in Moncton or Riverview with R-12 or R-20 fibreglass batts already in the attic floor, and the goal of reaching the current NB Building Code standard of R-50 (RSI 8.8) for Climate

Question 13

How do I properly install batt insulation in my Fredericton basement walls? | Insulation IQ?

Accepted Answer

Installing batt insulation in a Fredericton basement wall correctly requires careful attention to moisture management, air sealing, and code compliance — basement walls in New Brunswick are among the most frequently under-insulated assemblies in the province, and poor installation can lead to mould, thermal bridging, and long-term structural damage.

Before any insulation goes in, the wall assembly must be properly planned. Fredericton's climate falls firmly in Climate Zone 6, where the NB Build

Question 14

Should I use faced or unfaced batt insulation in my New Brunswick attic? | Insulation IQ?

Accepted Answer

For the vast majority of New Brunswick attics, the correct choice is unfaced batt insulation — and understanding why comes down to how vapour control works in a vented attic assembly.

In a typical vented residential attic in NB, the vapour retarder belongs at the ceiling plane, not up in the attic floor insulation itself. The standard approach is to apply a 6-mil polyethylene vapour barrier (or use drywall taped and sealed as a vapour retarder in newer construction) at the warm-in-winter side o

Question 15

What type of fibreglass batt insulation is best for New Brunswick winters? | Insulation IQ?

Accepted Answer

New Brunswick winters are unambiguous in their demands. Fredericton regularly reaches -25°C, Saint John contends with wind chill off the Bay of Fundy, and even the comparatively milder Moncton and the Acadian coast still clock weeks of sustained sub-zero temperatures each year. As a climate zone 6 province, New Brunswick sets building code insulation requirements that are among the more stringent in Atlantic Canada. Choosing the right fibreglass batt product means understanding the differences b

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