Standard Attic Insulation Width

R value is a measure of insulation s ability to resist heat traveling through it.

Standard attic insulation width. Insulating attics is rather straightforward but keep in mind these two important factors. Insulation level are specified by r value. 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. The higher the r value the better the thermal performance of the insulation.

Standard joist spacing for the installation of attic flooring materials is 16 inches on center oc meaning the distance from the center of one joist to the center of the next joist is 16 inches. Measure the area needing insulation. Minimum opening size the 2012 international residential code requires an attic access opening for attics with an area greater than 30 square feet and a vertical height in excess of 30 inches. This type of insulation is ideal for attics with standard spaced beams and joists.

If it s a standard fixture which typically has a cylindrical metal can projecting up into the attic do not allow any insulation to contact the fixture. If your current insulation is only five inches deep you will need to add seven inches of insulation to achieve the 12 inch r 38 rating. Striking a perfect balance between too little insulation and too much insulation will keep you and your family warm throughout the winter. 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.

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. Multiply the length times the width to determine the square footage of the space. Basics of faced fiberglass insulation from r 13 to r 19 r value is a standard unit of measurement for determining among many things how effective your insulation will be. First be careful when insulating around recessed light fixtures.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. Proper attic insulation is the best way to prevent heat loss in the winter and retain cool air in the summer. Batten sizes the correct batten width should be inch wider than the width of the stud space.