Cellulose Wall Insulation R Value

When walls are already finished injecting loose fill cellulose insulation is one of the few ways of adding.

Cellulose wall insulation r value.

The table below shows what levels of insulation are cost effective for different climates and. Once applied closed cell foams become rigid and have an r value range from r 6 to. Basics of faced fiberglass insulation from r 13 to r 19. How to achieve r 21 in a 2x4 wall.

Insulation is rated in two ways r value and u value. R value is a measure of insulation s ability to resist heat traveling through it. Higher r value numbers mean that the insulating material resists the cold or heat from the outside better. Insulation materials come in many forms.

R value is a standard unit of measurement for determining among many things how effective your insulation will be. R value measures conductive resistance. The common standard by which insulation is measured r value is the level of resistance to heat flow. Loose fill cellulose is relatively inexpensive yet still has an r value of about 3 5 per inch of thickness compared to fiberglass r value between r3 to r4 per inch.

For example a wall with 3 fiberglass batting r value of 10 8 11 9 may have an overall r value of nearly 14 because of siding sheathing and drywall. Insulation level are specified by r value. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. However it is seldom used in canada despite its reasonable cost and efficiency.

The r refers to absolute thermal resistance. There are two main types of spray foam. The higher the r value the better the thermal performance of the insulation. When cellulose is densely blown 3 0lbs ft3 or 48kg m3 or greater it is an excellent wall cavity insulation that provides a good r value at a reasonable cost.

Recommended home insulation r values. Open cell foam is soft and spongy impermeable to air but permeable to moisture and according to the doe has an r value per inch ranging from r 3 6 to r 4 3. The r value is a calculation which measures the flow of heat through an insulation product or its. Loose fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics.

Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. They are sprayed stapled blown nailed or simply laid in place. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.