Roof Insulation Requirements Ma

Minimum insulation r value requirements by state.

Roof insulation requirements ma.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. State only ma massachusetts 780 cmr chapter 13 5 r 30 state only mi michigan ashrae 90 1 2007 5 r 20 6 r 20 7 r 20 state only mn minnesota minnesota commercial state building code 6 r 30 7 r 35 please see disclaimer on back page. Minimum insulation r value requirements non residential above roof deck. 6102 4 1 protection of exposed foundation insulation.

See the department of energy s doe ranges for recommended levels of insulation below. 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. Minimum insulation r value requirements non residential above roof deck.

State only ma massachusetts 780 cmr chapter 13 5 r 30 state only mi michigan commercial michigan energy code 5r 30 6r 30 7r 35 state only mn minnesota minnesota commercial state building code 6r 30 7r 35 experience the carlisle difference please see disclaimer on back page. This matrix provides the minimum insulation r values required by local and state municipalities. 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. Insulation applied to the exterior of foundation wa lls and around th e perimete r of slab.

The second r value for mass walls applies when more than half the insulation is on the interior of the mass. In 2009 massachusetts became the first state to adopt an above code appendix to the base building energy code the stretch code 780 cmr appendix 115 aa the stretch code which emphasizes energy performance as opposed to prescriptive requirements is designed to result in cost effective construction that is more energy efficient than that built to the base energy code. R values for walls represent the sum of cavity insulation plus insulated sheathing if any. Non residential above roof deck.