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FYIs – Prescriptive High Performance Attics – 2016

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Prescriptive High Performance Attics §150.1

There are three options that may be used to comply:

Option A: Ducts and air handler may be located

in the attic

– Install attic radiant barrier (Zones 2-15)

– Install R-38 insulation at ceiling (R-30 in zones 3 & 5-7)

– Install continuous roof deck insulation (Zones 4 & 8-16)

  • R-6 with air space above insulation/ R-8

with no space

Option B: Ducts and air handler may be located

in the attic

– Install attic radiant barrier (Zones 2,3 & 5-7)

– Install R-38 insulation at ceiling (R-30 in Zones 3 & 5-7)

– Install below roof deck insulation (at rafter)

(Zones 4 & 8-16)

  • R-13 with air space above insulation/ R-18

with no space

Option C: Ducts and air handler must be located in conditioned space

– Install attic radiant barrier (Zones 2-15)

– Install R-38 insulation at ceiling (R-30 in Zones 3 & 5-7)