Attic Insulaation Markers Must Be Applied Every

In particularly cold climates you might go up to r 60.

Attic insulaation markers must be applied every.

Insulation levels are specified by r value. Set your store to. The recommended level for most attics. To assist an inspector and the installer in verifying the depth of the insulation the wsec requires that depth markers be placed in the attic space.

Markers shall be provided for every 300 square feet of attic area attached to the trusses rafters or joists and indicate in 1 inch high numbers the installed thickness of the insulation. Section r303 of the 2018 iecc all insulation vapor barrier and ventilation information must be listed at the proper location on the building plans. The depth markers must be installed for every three hundred square feet of attic area and must face toward the attic access. Your home s r value score will guide you toward the type of insulation you need.

Johns manville r 49 kraft faced fiberglass insulation batt 24 in. 1percentages of recycled content from usdoe eere. In general an attic s r value should be between r 30 and r 49. How much should i add.

R value is a measure of insulation s ability to resist heat flow. Set your store to see local availability add to cart. If your attic insulation covers your joists and is distributed evenly you probably have enough.