Interior Wall Insulation R Value

The table below shows what levels of insulation are cost effective for different climates and locations in the home.

Interior wall insulation r value.

The r refers to absolute thermal resistance. Insulation level are specified by r value. It is not easily possible to add insulation to your walls. R value is a standard unit of measurement for determining among many things how effective your insulation will be.

The higher the r value the better the thermal performance of the insulation. Basically the r value is how well insulated an rv s walls are. Polyurethane rigid foam is a closed cell insulation which. The r value depends on the type of insulation its thickness and its density.

Higher r value numbers mean that the insulating material resists the cold or heat from the outside better. That r value is based on the type of insulation that is in the walls of your rv. While wall insulation is limited by the width of the studs different materials provide higher or lower r values. 1971 1990 yes your walls have a 3 5 thick r 11 fiberglass batt in them with near certainty.

One option is to use polyurethane rigid foam insulation. Fiberglass batts for standard 2 4 walls are now available in low medium and high density products that range from r 11 to r 15. The higher the r value the more thermal resistant your rv walls will be. Note from this chart that the ideal r value differs for each part of your home.

It is available with r values ranging from r 18 to r 28 at a 3 inch thickness. What r value do i need. Additional r value for a masonry wall constructed using these materials needs to add the insulating value of additional wall components typically included such as 1 solid foam polyisocyanurate r 8 extruded polystyrene r 5 expanded polystyrene r 4 or 1 of perlite r 2 7 and for an exterior air film winter no wind r 0 17 an interior. R value is a measure of insulation s ability to resist heat traveling through it.

The higher the r value the greater the insulating power which means warm air inside your home will take longer to bleed through walls or ceilings helping to maintain a constant temperature. Thickness density and type of materials are some factors that contribute to r value. R value is the measurement of its ability to resist thermal heat transfer. 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.

Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. 1990 today yes starting around 1990 the r value was bumped up to r 13.