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Service Areas

R-Value Codes for Nova Scotia

New Construction

R-Value

Types of insulation options

R-Value Pre Inch

Thickness required in inches to achieve code

Other Info

Exterior walls in basement

R-20

Spray foam 
Closed cell

Open Cell

Spray on fiberglass

Foam board stock

R-6


R-3.7

R-4.36


R-5

3.35”


5 ½“

4 ¾”


4”

Minimal of 4 inch space is required to install.

 

Requires minimal of two days to dry

Exterior walls at ground level and above

R-24

Spray foam 
Closed cell

Open Cell

Spray on fiberglass

Foam board Stock

R-6


R-3.7

R-4.36


R-5

4”


6 ½“

5 ½“


Depends

Minimal of 5 ½“ space is required to install.

 

Requires minimal of two days to dry

This product can be used with other product to achieve your require R-value

Traditional attic

R-50

Spray foam 
Closed cell

Open Cell

Blown-in fiberglass

Blown-in
Cellulose

Fiberglass
Batts

R-6


R-3.7

R-2.65


R-3.4


R-3.6

8.3”


13.5”

19”


15”


14”

 

 

 

 

 

 

Roof slopes

R-31

Spray foam 
Closed cell

 

Open Cell

Blown-in fiberglass
Densely packed

Blown-in
Cellulose
Densely packed

Fiberglass
Batts

R-6

 

R-3.7

 

R-3.6

 

R-3.6

 

R-3.6

5.5”

 

9”

 

9”

 

9”

 

9”

Can be installed as a hot roof with no venting required. Must have 6 ½“ to install.

Must have two inch air flow above insulation.

Must have two inch air flow above insulation.

 

Must have two inch air flow above insulation.

Must have two inch air flow above insulation.

Flat roof deck

R-31

Same as above

Same as above

Same as above

Same as above

Ceiling in crawl space

R-31

Same as above

Same as above

Same as above

Vapour barrier must be on the warm side of the insulation.

Floor of overhang

R-31

Same as above

Same as above

Same as above

Vapour barrier must be on the warm side of the insulation.

Rim joices above ground

R-24

Spray foam 
Closed cell

Open Cell

 

Fiberglass Batts

R-6

 

R-3.7

 

R-3.6

4”

 

6 ½”

 

6 ½“

No vapour barrier is required

 

Vapour barrier is required, hard to install in these areas.

Vapour barrier is required, hard to install in these areas.

Rim joices in basement

R-20

Spray foam 
Closed cell

Open Cell

 

Fiberglass Batts

Same as above

3 ½”

 

5 ½“

 

6 ½“

Same as above

Under slabs

 

R-10

Spray foam 
Closed cell

Foam board stock

R-6

 

R-5

2”

 

2”

Completely seal all gases out of your basement.

Hard to get a good seal. Seal can break after walking on

Phone: (902)497-8391

Email: info@maritimeinsulators.com


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