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.
R rating for attic ny.
As a benchmark one inch of solid wood has an r value of 1.
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.
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.
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.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Recommended insulation levels for retrofitting existing wood framed buildings.
Houses in a cold climate should have a minimum of r 49 in the attic which is equivalent to approximately 16 of fiberglass insulation.
R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.
See the department of energy s doe ranges for recommended levels of insulation below.
Add insulation to attic.
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.
Insulation r values the r values of insulation in any part of the thermal envelope are defined by your compliance analysis.
Duct insulation r value requirements annual heating degree days.
The r stands for resistance and refers to the resistance a material has to heat flow or temperature conduction.
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.
New york recommended home insulation r values zone 4.
Existing attic 3 4 inches of insulation r 38.
Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter.
Read more to check the reccommended r value based on the area where you live.
Floors r 25 to r 30.
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.
R value is the rating system used to grade insulation products or a material s insulating properties.
Warmer climates only require an r 38 or higher or about 12 or more.
