The National Building Code -Alberta Edition requires an R-value of R22 (RSI 3.08) for all above ground framed walls.
What is a good R-value for exterior walls in Canada?
R-13 to R-23
There are different levels of insulation for different climates as well as corners and spaces of your home. Typically, R-13 to R-23 is recommended for exterior walls. The regular R-Value ranges from R-12 to R-15 depending on the type of insulation material and its frame size.
What is normal R-value for walls?
R-13 to R-23
Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. See the Department of Energy’s (DOE) ranges for recommended levels of insulation below.
What R-value do I need in Canada?
Generally speaking, a higher R-value means better insulating properties. The recommended R-value for attic insulation in Ontario is between R-50 and R-60.
What is the minimum R-value for walls in Ontario?
Exterior walls, for example, are recommended to have an Insulation R-Value of at least R-40, while ceilings and attic spaces will need a higher R-Value which with new recommendations, goes up to R-60.
What R-value do you need for winter?
For winter camping, you generally want an R-value of at least 5, while three-season campers only need an R-value of 2 or more for most conditions. R-values are additive, so stacking two pads on top of each other provides an R-value that is more or less the sum of their individual R-values.
What R-value do I need for 2×4 walls?
R-13
Fiberglass and rock wool batts—2×4 walls can hold R-13 or R-15 batts; 2×6 walls can have R-19 or R-21 products.
What is the R-value of a garage in Canada?
If you live in Canada, harsh weather conditions will impact what R-value is recommended for maximum energy efficiency. For insulated and heated garages, Creative Door recommends a minimum of R-11. Otherwise, an R-value of 14-16 is ideal.
What is the R-value of a masonry wall?
According to the National Concrete Masonry Association (NCMA) the tested R-Value for a standard 8x8x16 concrete masonry unit (CMU) is 2.2 at 105 lb. density. The tested solid grouted R-Value for the same unit is 1.7 proving that air is a better insulator than grout (which is a form of concrete).
How do I increase the R-value in my walls?
To increase the energy efficiency of your home, you can boost the R-value of walls by adding more batt insulation between wall studs or installing foam-board insulation. You can also use blown-in insulation to fill any gaps where drafts can occur.
What is the R-value for a basement in Ontario?
Install a minimum of RSI 2.1 (R-12) unless local building codes require more.
How are houses insulated in Canada?
Contractors and architects of energy-efficient homes will separate the house from the ground with a concrete foundation and a continuous layer of rigid foam insulation below the slab. High thermal mass concrete holds radiant energy and keeps a home dry and warm.
What is the R-value of a 2×6 wall?
between R-19 and R-21
The installed insulation R-value for 2×6 fiberglass batt ranges between R-19 and R-21. When blown or sprayed cellulose insulation is used, the R-value is typically R-20 for 2×6 walls.
Do concrete walls have an R-value?
The R-value listed by PCA for a normal-weight (144 pcf) 6-inch concrete wall is 1.23 and includes inside and outside air-film resistances, which contribute to overall thermal resistance.
Does drywall increase R-value?
All building materials offer some degree of R-value, or heat flow resistance, but some are better than others. Drywall, for instance, has an R-value of about R-0.5 for its half-inch thickness. This is minimal when you consider that filling a 4-inch-thick wall cavity with insulation increases the R-value to about R-15.
Is R 19 good for walls?
A good guide is R-Value recommendations published by EnergyStar. As you can see from the map below, R19 is recommended for 2×6 walls across all climate zones in the US. So if you are looking to build an efficient home that meets code, R19 Insulation may be required.
Does insulation lose R-value over time?
The loss of R-value started at a temperature difference of about 32° F. With the temperature below the ceiling drywall held at 70° F, the R-value started dropping when the attic temperature was reduced to 38° F and had lost 35-50% when the attic temperature got to 0° F and below.
What is the recommended R-value for a basement wall?
Understand “R values” — the measurement of insulation’s effectiveness or thermal resistance. The Model Energy Code recommends R-11 insulating values for basement walls in most of the country and R-15 for the northernmost states.
What is the R-value of 1 inch Styrofoam?
Styrofoam is a trademark name for XPS; the R-value of Styrofoam is 5.2 per inch since it is a high-density XPS. High-density EPS has an R-value of 4.2 per inch; low-density EPS has an R-value of 3.85 per inch.
What is the R-value of 4 inch thick wood?
The R-value for wood ranges between 1.41 per inch (2.54 cm) for most softwoods and 0.71 for most hardwoods.
Should interior walls be 2×4 or 2×6?
2x6s Will Result in a Better Insulated Home – Usually
Not surprisingly, a 2×6 frame construction allows for more space between your interior and exterior walls. This extra space alone typically doesn’t result in better insulation, but it does offer more room for added insulation.