Best Practices for HPA/HPW Construction Presented by: Rob Starr, - PowerPoint PPT Presentation

Best Practices for HPA/HPW Construction Presented by: Rob Starr, Residential Training Manager, ConSol

About ConSol  Energy consulting – local, state and national  Energy analysis and design  Mechanical engineering - focused on hot and dry  Inspections and diagnostics – residential and commercial  Auditor for retrofit programs for Central Valley, CA  One of two CEC certified registries for CA Energy Code  Residential  California - Chair, CBIA Energy and Codes Committee  Governor’s Advisory Board - CALGreen  NAHB – Energy and Green Subcommittees, Energy Efficient Buildings Tax Credit Working Groups  NGBS 2015 ICC-700 Consensus Committee  Commercial  California Building Properties Association  BOMA California, NAOIP, ICSC, IREM, RILA 3

2016 Title 24 Building Efficiency Standards • Five significant changes went into effect on January 1, 2017 – High Performance Attics (HPA) – High Performance Walls (HPW) – 0.82 EF Tankless Water Heaters – High Efficacy lighting – Solar Trade-Off 4

High Performance Attics (HPA) 5

What are the Prescriptive Requirements for High Performance Attics? 6

OPTION A – ABOVE ROOF DECK  Requires Insulation Above the Roof Rafters, directly in contact with the roof deck  R6 required when an air gap is present  R8 required when no air gap is present  Requires Radiant Barrier to be installed  Requires R38 insulation above the ceiling lid  Requires a ventilated attic 7

DETAIL OF INSULATION ABOVE THE ROOF DECK 8

DETAIL OF INSULATION ABOVE ROOF RAFTER

OPTION B – BELOW ROOF DECK  Requires Insulation Below the Roof Deck, Installed between the roof rafters  R13 required when an air gap is present  R18 required when no air gap is present  No Radiant Barrier to be installed  Requires R38 insulation above the ceiling lid  Requires a ventilated attic 10

BELOW ROOF DECK WITH AIR GAP

DETAIL OF INSULATION BELOW DECK 12

DETAIL OF INSULATION BELOW DECK 13

OPTION C – DUCTS IN CONDITIONED SPACE  Requires air handler and ducts to be in conditioned space  Requires radiant barrier to be installed – CZ dependent  Requires R30/38 installed at ceiling – CZ dependent  Requires a ventilated attic 14

DETAIL OF DUCTS IN CONDITIONED SPACE 15

DETAIL OF DUCTS IN CONDITIONED SPACE 16

DETAIL OF DUCTS IN CONDITIONED SPACE 17

PERFORMANCE OPTION –SEALED UNVENTED  Requires complete air sealing between attic and exterior  Requires minimum insulation levels at underside of roof deck  Does not require radiant barrier  Does not require insulation at ceiling  Does not require venting  Does not qualify for ducts in conditioned space 18

DETAIL OF SEALED UNVENTED ATTIC 19

High Performance Walls (HPW) 20

What is a High Performance Wall? 21

U FACTOR TABLES FOR 16” OC 22

U FACTOR TABLES FOR 24” OC 23

High Performance Walls

High Performance Walls

Window Detail – Wood Buck 26

Window Detail – Thermal Buck 27

Window Detail – No Buck 28

Window Detail – With Wood Buck 29

WATERPROOFING WHERE RIGID SHEATHING IS WATER BARRIER 30

Resources www.wisewarehouse.org HPA Protocol Reference Manual HPW Protocol Reference Manual HPW/HPW Product and Strategy Assessment Manufacturer Specific Installation Guides 31

Thank you. Presenter: Rob Starr, Residential Training Manager, ConSol For more information on WISE Contact: Dan Krekelberg, Program Manager– info@wisewarehouse.org