Zero Specifications. 135 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

Transcription

1 Zero Specifications 135 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

2 DOE ZERH Eligible Building Types Single-Family Detached Single-Family Attached Multi-Family Dwelling Units < 5 Stories Above-Grade Individual HVAC Dwelling Units Occupy > 80% Occupiable SF Individual or Central DHW (no solar required) 136 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

3 Zero Energy Ready Home Spec Optimized Advanced Enclosure Enclosure System Optimized Comfort System Water Protection System Complete IAQ System Efficient Comps System Solar Ready System 137 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

4 IECC Climate Zones 138 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

5 Key Strategy Align with ENERGY STAR for Homes v3: Comprehensive Building-Science System Variable vs. Fixed HERS Index Score House Size Adjustment to HERS Score 2009 v3 v1 & v INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

6 DOE ZERH Framework Mandatory Reqts. Must Comply Target Home Specs Trade-Off Flexibility Size Adjust. Factor Identical to Energy Star 140 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

7 Mandatory Requirements Encouraged: WaterSense Label (indoor and outdoor) Disaster Resistance (IBHS Fortified Home) Quality Management 141 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

8 ZERH vs. ES Target Home Spec Higher Eff. HVAC Equip vs IECC Insul. Half ACH50 More Eff. Windows ENERGY STAR vs. Min. WH 142 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

9 ZERH Average HERS Scores 70.0 Typical Average DOE DOE ZERH-Compliant Challenge Home HERS Index by by Climate Zone Zone (Overall Average = 55.5) 65.0 HERS Index Climate Zone Based on 1800, 2400, and 3600 ft 2 prototypes on climate-appropriate foundations. 143 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

10 Size Adjustment Factor Homes larger than the benchmark home size must use the size adjustment factor to determine the target HERS index Note: Renewable energy systems may not be used to qualify for the ZERH HERS Index Target Score, but may be used for the incremental HERS Index points needed for the Size Adjustment Factor. Size Mod. Factor = [CFA Benchmark Home /CFA Home to Be Built ] 0.25 [Not to Exceed 1.0] 144 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

11 Performance Path Example CZ5 Prototype - 4 BR, 2400 SF Specification Target Home Spec Design Home AGW Insulation R20 or R13+5 R20 Attic Insulation R49 (U=0.026) R50 Basement Walls R15/19 R10 Windows U=0.27; SHGC=0.40 U=0.32; SHGC=0.30 Infiltration 2.0 ACH ACH50 Ducts Total 8 CFM25 per 100 SF of CFA; Leakage to outdoors 4 CFM25 per 100 SF of CFA Furnace AFUE A/C SEER Whole-House Mech. Vent. Total leakage 288 CFM25 In Conditioned Space w/ ½ ACH50 (Req. d by ENERGY STAR) Exempt 77 cfm; 1.2cfm/W balanced; 77 cfm; 8.0 cfm/w exhaust-only Water Heater ENERGY STAR Gas storage 0.67 EF HERS Index COMPLIES! 145 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

12 Rating & Verifying Homes Same: ENERGY STAR Homes framework New: Indoor airplus Checklist; Renewable Energy Ready Home Checklists (if req d.) Hot Water Distribution test Submissions: Current: Send DOE ZERH Verification Summary electronically to Future: Automatically submitted as part of rating to RESNET National Homes Registry 146 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

13 ZERH Resources: Technical Technical Webinars Webinar Meetings Building America Solution Center (BASC) Building America Research Studies Leading Builder Round-Table Meetings For Info: INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

14 Zero Specifications: Optimized Enclosure System 148 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

15 Zero Energy Ready Home Spec Optimized Enclosure System 2012 / 2015 IECC + Envelope Insulation Tighter Construction ENERGY STAR Windows = 149 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

16 Optimized Enclosure is Part of Complete Building Science System Building Science: Air Flow Thermal Flow Moisture Flow Vapor Flow Thermal Enclosure System Heating, Cooling, & Ventilation System Water Management System 150 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

17 Thermal Enclosure System A well-insulated and air-sealed home, with good windows and doors, reduces the amount of energy needed to keep the home comfortable. 151 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

18 Basic Concepts 1. Energy moves from more to less. 90 o F - Outside 90 o F 40 o F Cooler Coole with Ice 152 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

19 Basic Concepts 1. Energy moves from more to less. 105 o F 105 o F 72 o F 153 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

20 Basic Concepts 1. Energy moves from more to less. 30 o F 70 o F 30 o F 154 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

21 Thermal Holes Are a Big Deal 1, 000 sq. ft. R-38 Attic U =.026 Drop-Down Stair = R-1 R-1, U = sq. ft. = 1% of area What Percent Loss in Attic R-Value? 155 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

22 Thermal Holes Are a Big Deal Avg. U = = = U1 x A1 + U2 x A2 + Total Area (A) (.026 x 990) + (1 x 10) 1, ,000 =.036 R-28 27% < R-38 = = 1% Hole Results in 27% Loss of R-Value 156 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

23 Thermal Holes Are a Big Deal Assume 50 o F temperature difference across attic ceiling Heat Flow = U x A x T Heat Flow w/o Hole =.026 X 1,000 x 50 = 1316 Btu/hr Heat Flow w/hole =.036 x 1,000 x 50 = 1786 Btu/hr 33%+ Greater Heat Flow with 1% Hole 157 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

24 Thermal Holes Are a Big Deal 158 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

25 Optimized Enclosure System Air-Tight Construction Complete Air Barriers - Thermal Bypass - Wind Intrusion Insulation System - Next Code Quantity - Proper Installation - Minimum Thermal Bridging Advanced Windows Air and Thermal Flow Control 159 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

26 Zero Specifications Optimized Enclosure System Air-Tight Construction 160 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

27 Why Air-Tight Construction 16 to 50% of HVAC Loads Moisture Problems Comfort Problems Indoor Air Quality 161 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov 161

28 Target Home Air-Tightness ACH50 Requirements/Targets Climate Zones Zero Energy Ready Home ENERGY STAR V IECC Passive House INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

29 Seal Usual Suspects Cracks: Sill Plates Windows & Doors Drywall at Top Plate Access Panels Sheathing Joints Foundation/Framing Penetrations: Plumbing Wiring Recessed Lights Vents HVAC Duct Boots Shafts: Flues Ducts Plumbing Odd Geometry: Cantilevers Knee-walls 163 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

30 What We re Trying to Avoid Attic Air Infiltration Between Drywall and Top Plate 164 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

31 Drywall Sealed to Top Plate Default: Spray Foam Alternative: Sill sealer Alternative: Constr. Adhesive 165 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

32 Air Leakage Distribution Exterior air barrier Cathedral ceiling Sheathing / roof joint Pa 6% 1% 93% Sheathing / top plates Stud / top plates Top plates Zones 2-Story house (Floor area = 2,000 ft 2 ) Sheathing / roof joint unsealed 0.5 ACH 50 DOE Zero Energy Ready Home Requirement Contribution to requirement (%) Requirement IECC 2012 Contribution to requirement (%) INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

33 Rectangular Electrical Box - 1/8 to 1/4 perimeter gap - ~ Pa - Perimeter gap sealed - Somewhat effectively with one-component polyurethane foam - Effectively with caulk - Wire holes 50% of leakage 167 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

34 Fasteners Air leaked at nailed fasteners Repeat test with screwed fasteners 168 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

35 Air Leakage Contribution Estimates Exterior Air Barrier: 2-Story House (2,000 sq. ft.) (4) Elect. Outlets = 0.17 ACH 50 Exterior Sheathing/Foundation = 0.51 ACH 50 (5) Lights = 0.29 ACH 50 Ext. Sheathing/Roof = 0.51 ACH 50 Air barrier Duct 0.22 ACH Sheathing/Foundation Joint Unsealed = Sheathing/Roof Joint Unsealed = (4) Electrical Outlets = (5) Ceiling Lights = Return Duct = ACH INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

36 Sealing HVAC Ducts with Aeroseal 170 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

37 Air Sealing Homes with Aerosol Photos from wcec.ucdavis.edu 171 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

38 Zero Specifications Optimized Enclosure System Insulation System 172 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

39 What are Differences in 2012 and 2015 IECC Insulation Requirements? Changes Between the 2012 IECC and 2015 IECC Change No Change Prescriptive R-Value U-Value Alternative Total UA Alternative ONLY Change in U-Value is for Above-Grade Framed Walls No Changes to Prescriptive R-Value Requirements 173 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

40 U-Factors for Above-Grade Framed Walls Climate Zone 2012 U-Factor Equivalent Above- Grade Frame Wall (Table ) except Marine 5 and Marine and U-Factor Equivalent Above-Grade Frame Wall (Table ) Change (% and Direction) 2% Decrease in Stringency 2% Decrease in Stringency 5% Decrease in Stringency 5% Decrease in Stringency 5% Decrease in Stringency 6% Increase in Stringency 6% Increase in Stringency 174 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

41 Impacts of Meeting 2015 IECC UA Levels No additional burden for most designs In Climate Zones 1 5, meeting 2015 IECC via a whole-building UA tradeoff will be very slightly less stringent Required Frame Wall U-Factor is 2 to 5% less stringent Frame Walls might comprise ~ 20% 40% of total shell area INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

42 2012 IECC Insulation Compliance with next generation code Three Options: Prescriptive Alternative equivalent U-factor Total UA calculation [allows window to be included] Allowances for ceilings without attic spaces [up to 500 square feet or 20% of roof area, whichever is smaller] 176 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

43 2012 IECC Insulation Walls CZ 5 CZ 6 R-20 or R-13+5 Ceiling R-49 Floor R-30 Basement Crawl Space R-15/19 R-15/19 R-20+5 or R Slab R-10/2 Deep R-10/4 Deep 177 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

44 Insulation Proper Installation Gap Void Compression Misalignment 178 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

45 Insulation Thermal Bridging 179 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

46 High-R Wall Options (Climate Zones 6-8) Condensation Inside the Wall Cavity Risk Management Issues Bulk Moisture Control Disaster Resistance Structural Support for Cladding Installation Quality Control Insulated Framed Cavity Wall (Single or Double) Insulated Framed Cavity Wall with < 60% Insulation Outboard Framed Assembly with > 60% Insulation Outboard Structural Insulated Panel (SIP) System Exterior Insulated Concrete/Masonry Wall System Interior Insulated Concrete/Masonry Wall System Insulated Concrete Form (ICF) System 180 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

47 Risk Managed Insulated Framed Cavity Wall Framing Options Advanced Framing TJI Studs Double-Wall Framing Insulation Options Fibrous Insulation Blown-in Fibrous Insulation Batt Open-Cell Spray Foam Closed-Cell Spray Foam Flash and Blow/Batt Risk Management Guidance Condensation Inside Cavity Bulk Moisture Control Disaster Resistance Quality Installation 181 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

48 Zero Specifications Optimum Enclosure System Insulation System: Complete Air Barriers 182 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

49 Complete Air Barriers Walls Showers and Tubs Fireplaces Attic Knee Walls Skylight Shaft Walls Adjoining Porch Roof Staircase Exterior Walls Double Walls Rim/Band Joists Other Exterior Walls Floors Floors Above Garage Cantilevered Floor Unconditioned Floor (Basement/Crawl Sp.) Ceilings Dropped Ceiling/ Soffit at Unconditioned Attic Other Ceilings 183 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

50 Air Barrier Example: Attic Knee Wall No rigid backing on knee wall. Rigid backing installed prior to insulation. 184 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

51 Air Barrier Example: Garage Rim Joist No air barrier is present between garage and conditioned space. Air barrier is present between garage and conditioned space. 185 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

52 Air Barrier Example: Wall Adjoining Porch Roof No air barrier between porch attic and conditioned space. Air barrier is installed prior to porch attic framing. 186 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

53 Zero Specifications Optimized Enclosure System Insulation System: High-R Walls 187 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

54 High-R Wall Options Advanced Framing Thicker Wall Staggered Studs Double Wall Rigid Insulation Exterior Sheathing With Sheathing Without Sheathing With Extended Plate and Beam With Structural Engineered Panel Systems Building Structural Insulated Panels (SIPs) Insulated Concrete Forms (ICFs) Insulated Concrete Panels (ICPs) Precast Concrete 188 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

55 Adv. Framing w/thicker Walls R-17 R-21 (U ) Higher Framing Factor (~12-15%) Blanket Insulation Issues: R-19 is 6 Thick, Compressed is R-17 R-21 is 5.5 Thick, Uncompressed is R-21 Blown-In Insulation Issues: Settling Proper Density (Bag Count) Spray Foam Issues: High Cost Closed Cell Enhances Structure Perf. Still Need to Ensure Quality installation 189 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

56 Adv. Framing: Staggered Studs 2x6 plates with 2x4 staggered studs at 12 /24 o.c. Reduces thermal bridging by 80-90% Cost competitive with traditional 2x6 wall Need to ensure spacing between studs okay for deflection 190 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

57 Adv. Framing: Double-Wall R-26 Walls (U ~ 0.034) Studs Offset or Separated to Ensure Complete Thermal Break Coldest Outside Sheathing Needs to Ensure Drying Vapor-open designs use higherperm sheathing such as plywood or exterior-grade gypsum board Modeling needed to assure moisture control Same Framing Techniques Already Understood by Trades 191 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

58 Rigid Insulation w/sheathing R-18 Wall (U 0.054) Complete Thermal Break Condensation Surface Outboard Structure Can Combine Sheathing w/ Weather Resistant Barrier Installation Issues: < 1.5 Thick, Nails Okay > 1.5 Thick, Screws Needed 192 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

59 Rigid Insulation w/o Sheathing R-17-R-28 Wall Complete Thermal Break Enhanced Racking Strength and Impact Resistance with CCSpf Enables No Sheathing Rigid Insulation Sheathing serves as Weather Resistant Barrier w/liquid Membrane at Joints and Pan Flashing Substantially Reduced Framing including Single Plates Engineered Stamped System Cost Competitive 193 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

60 Rigid Insulation w/extended Plate R-18 Wall 2x4 Studs with 2x6 Plates Sheathing Attached to Plates for Near Full Racking Strength Complete Thermal Break Except for Top and Bottom Plates Condensation Surface Inside Assembly, so Must Control Air Flow Cladding Attachment Simplified if Permissible to Nail to Sheathing 194 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

61 Rigid Insulation w/engineered Panel Innovative & Affordable Based on the perfect wall, using a studless structural engineered panel Single water, air, and vapor control layer Recent experience has demonstrated it can be built for less than a standard wood-frame wall system 195 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

62 Rigid Insulation w/engineered Panel Step 1: Build the entire structure including foundation, floor systems, walls, and roof REEBM 2010 University of Minnesota - Cold Climate Housing 196 University of EDC INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

63 Rigid Insulation w/engineered Panel Step 2: Wrap the entire envelope with a peel & stick membrane integrated with openings / penetration REEBM 2010 University of Minnesota - Cold Climate Housing 197 University of EDC INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

64 Rigid Insulation w/engineered Panel Step 3: Add rigid foam insulation 2 to 3 on foundation 3 to 4 on walls 6 to 8 on the roof REEBM 2010 University of Minnesota - Cold Climate Housing 198 University of EDC INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

65 Rigid Insulation w/engineered Panel Step 4: Add furring strips, overhangs, etc. REEBM 2010 University of Minnesota - Cold Climate Housing 199 University of EDC INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

66 Rigid Insulation w/engineered Panel Step 5: Install trim; siding; roof sheathing and roofing REEBM 2010 University of Minnesota - Cold Climate Housing 200 University of EDC INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

67 Rigid Insulation w/engineered Panel 201 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

68 Rigid Insulation w/engineered Panel REEBM 2010 University of Minnesota - Cold Climate Housing 202 University of EDC INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

69 Rigid Insulation w/engineered Panel REEBM 2010 University of Minnesota - Cold Climate Housing 203 University of EDC INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

70 Structural Insulated Panels (SIPs) R-26 Walls (6 ) (U 0.034) Substantial Thermal Break (3 8% Framing Factor) Special Construction Practices Required Foundation has to be Perfectly Level Significantly Reduced Time-of- Construction Reduced Dimensional Variation Corrections Killer Applications 204 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

71 Insulated Concrete Forms (ICFs) ~R-24 Walls (U 0.038) Complete Thermal Break Useful Thermal Mass Foundation has to be Perfectly Level Longer Time-of- Construction Maximum Disaster Resist. Termite Resistant Reduced Dimensional Variation Corrections Much More Costly 205 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

72 Insulated Concrete Panels (ICPs) ~R-24 Walls (U 0.038) Complete Thermal Break Useful Thermal Mass Foundation has to be Perfectly Level Significantly Reduced Time-of- Construction Maximum Disaster Resist. Termite Resistant Reduced Dimensional Variation Corrections Cost Competitive 206 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

73 ICP Installation Steps 1 Panels As Delivered 2 Panels 3 Horizontal 4 Top C- 5 Concrete 6 Poured Inserted into Base Track Rebar Added Channels Inserted Poured Concrete Inside Panel 207 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

74 Zero Specifications Optimized Enclosure System Insulation System High-R Foundations 208 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

75 High-R Foundation: Exterior Insulation Source: Oak Ridge National Laboratory 209 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

76 High-R Foundation: Interior Insulation Source: Oak Ridge National Laboratory 210 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

77 High-R Foundation: Interior Insulation Source: Building Science Corporation 211 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

78 Zero Specifications Optimum Enclosure System Insulation System: High-R Roofs 212 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

79 High-R Roof Insulation at Flat 213 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

80 High-R Roof Insulation at Slope 5.1 AIR-IMPERMEABLE: In direct contact with the underside of the sheathing What R-value? Building Science Corporation 214 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

81 Insulation for Condensation Control Minimum R-value of Impermeable Insulation Climate Zone Minimum Impermeable Insulation R-Value* 2012 IECC Ceiling R-Values 2B and 3B Tile Roof None Required 30 1, 2A, 2B, 3A, 3B, 3C R C R A, 4B R R R R R *contributes but doesn t supersede 2012 IECC insulation requirements 215 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

82 Top Insulated Roof Deck 216 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

83 Guidance for Dense Pack Roof 217 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

84 Spray Foam Under Roof Decks Figure 2 Minneapolis, MN July INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

85 Zero Specifications Optimized Enclosure System Advanced Windows 219 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

86 ENERGY STAR Windows Assures beyond-code window performance Fenestration used for passive solar design are exempt from the U-factor and SHGC requirements Area-weighted averages for U-factor, SHGC permitted 220 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

87 Good, Better, Best Windows Hot Climates IECC CZ 1-2 Mixed Climates IECC CZ 3-4 except Marine Cold Climates IECC CZ 5-8 and 4 Marine U-value SHGC U-value SHGC U-value SHGC Mandatory: ENERGY STAR [4] 0.40 [3] 0.25 Performance: Target Home Any Any Encouraged: High-R Any 221 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

88 Why Go Beyond ENERGY STAR* Window 15% of Wall Area Wall R-Value with Windows w/varied Wall Insulation Levels U-Value R-0 R-18 R-39 R R-5 R-11 R-15 R R-5 R-13 R-19 R R-5 R-14.5 R-23 R R-5.5 R-16 R-27 R-34 * In Cold Climates Sources: Holes in the Wall: To Improve the Energy Performance of Walls, Look at the Total R- Value, Journal of Light Construction, February 2014; Multi-Assembly R-Value / U-Value Calculator Cascadia Windows and Doors; Michael Blasnik Presentation, 2014 ACI Conference 222 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

89 The Biggest Thermal Hole. 223 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

90 Zero Specifications: Water Protection System 224 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

91 Zero Energy Ready Home Spec Water Protection System + Sump Pumps Flooring Materials Sub-Slab Aggregate = 225 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

92 Moisture Vapor (Air Flow) Control Air Sealing Air Barriers Vapor Barriers/Retarders HVAC Quality Installation Whole-House Ventilation Spot Ventilation Thermal Enclosure Checklist HVAC Quality Installation Checklist 226 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

93 Bulk Moisture Control Concept 227 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

94 Bulk Moisture Control Weather Resistant Barriers Flashing Capillary Breaks Water Management Checklist 228 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

95 Horrible Analogy Many materials used in building homes are not durable when wet. Especially important in high performance homes, regardless of whether ENERGY STAR certified. 229 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

96 What We re Trying to Avoid Missing step & kick-out flashing 230 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

97 Step & Kick-Out Flashing 231 INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov