R Rating For Attic Ny

Insulation r values the r values of insulation in any part of the thermal envelope are defined by your compliance analysis.

R rating for attic ny.

Floors r 25 to r 30. Attic insulation run between r 49 to r 60. R value is the rating system used to grade insulation products or a material s insulating properties. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

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. Read more to check the reccommended r value based on the area where you live. Existing attic 3 4 inches of insulation r 38. For example if ducts insulated to r 6 are located in an exterior wall insulated to r 19 the area of the wall minus the duct area is a wall component with 19r insulation and the area of the ducts is a wall component with r 6 insulation.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. The r stands for resistance and refers to the resistance a material has to heat flow or temperature conduction. Walls should be between r 19 to r 21 basement walls r 13 to r 19. 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.

As a benchmark one inch of solid wood has an r value of 1. If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs. Whether it is a prescriptive table a res check printout or any other approach the minimum r value for each compo nent is specified and documented with the building permit application ecccnys section 104. Warmer climates only require an r 38 or higher or about 12 or more.

Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation. Add insulation to attic. See the department of energy s doe ranges for recommended levels of insulation below. Recommended insulation levels for retrofitting existing wood framed buildings.

New york recommended home insulation r values zone 4. Existing 3 4 inches of insulation. Duct insulation r value requirements annual heating degree days.