2009 IECC – Residential Energy code Training

1. 2009 IECC – Residential Energy code Training

3. Summary of Changes • Windows U-0.35 • Basement Walls R-10 to Frost Line • Slab Insulation – R-10 • Recessed Lights – Air Tight and IC rated • Ducts in Unconditioned Space • Supply Ducts in Attics R-8 • All Other Ducts R-6 • Attic insulation at extends to outside edge of top plate R-30

4. Summary of Changes • Duct systems that extend into unconditioned space must be visually inspected (mastic) or tested for leakage. • Air tightness of the building must be visually inspected or tested. • Access hatches and doors to unconditioned spaces must be insulated and weatherstripped.

5. Summary of Changes • Fireplaces must have gasketed doors and outside combustion air. • Using the Performance Option the efficiency of the HVAC system is not considered. The building envelope annual energy use must be equal to a building meeting the prescriptive requirements.

6. Definitions Conditioned Space: An area or room within a building being heated or cooled, containing uninsulated ducts, or with a fixed opening directly into an adjacent conditioned space.

7. Definitions Conditioned space Building Thermal Envelope attic Building Thermal Envelope: The basement walls, exterior walls, floor, roof, and any other building element that enclose the conditioned space. This boundary also includes the boundary between conditioned space and any exempt or unconditioned space.

8. Building Thermal Envelope • Components: • Fenestration • Windows, doors, skylights • Ceilings • Walls • Above grade • Below grade • Mass walls • Floors • Slab • Crawl space

9. The Building Envelope Can Be Deceiving

10. STAIRCASE WALLS Notes: Door to unconditioned space: insulated, weather stripped Wall to unconditioned space: insulated and sealed on all 6 sides Area above the stairs: insulated same as floor Not required with conditioned basement. Carefully consider how to define the thermal envelope with an unconditioned basement or attic in the area surrounding the stairs

11. Builder

12. Will there be an HVAC system in the attic and will there be insulation on the ceiling? • Performance vs Prescriptive • Where and how the thermal barrier will be established (insulation location) • Where or how the air barrier will be established (insulation type) • Details of meeting Prescriptive requirements, such as ceilings without attic spaces

13. What sub-contractor will be responsible for what job function • Insure all mandatory provisions are met • Provide blueprints with all insulation levels, window and door U-factors specified • If blueprint includes insulated area square footage it will simplify calculations • Areas should be provided for every unique external condition, such as walls next to an unconditioned attic. • Estimated air leakage rate

14. Foundation Contractor

15. Slab-on-grade floors R-10 (typically 2 inches) insulation in Zone 4 Downward from top of slab a minimum of 24” Insulation can be vertical or extend horizontally under the slab or out from the building (must be under 10 inches of soil), Can be angled at edge of slab

16. Foundation: Typical Slab Installation How to insulate the top edge internally?

17. Foundation: Typical Slab Installation Local option allowed Add taper to top of slab

18. Framer

19. Needs to know • Will there be an HVAC system in the attic and will there be insulation on the ceiling? • must build platform and insulation dam • Where blocking is needed for air barrier • Kneewall • Cantilevered floors • Bonus room over garage • Foam strip needed under wall plate

20. HVAC Platform Extension added to ceiling joists to allow the depth of insulation need to provide an R-38 or R-30, total height of 10 to 12 inches.

21. Attic Insulation Dam

22. Corner Framing to Allow Insulation

23. Ladder Framing to Allow Insulation No insulation possible Insulation without bridging Insulation with some bridging Insulation without bridging

24. Insulated Header 2x Member ½” Rigid Insulation 2x Member

25. Framer - Air Leakage ControlRim Board Glue or Foam Strip Glue or Foam Strip Glue Glue Foam Strip

26. Preparing for Insulation

27. Kneewall Blocking

28. Kneewall Blocking Conditioned Space Unconditioned Space Unconditioned Space Conditioned Space Conditioned Space Unconditioned Space

29. Kneewall Blocking

30. Walls All walls must have 6 solid side, top, bottom, front, back No top plate 2x4 Flat – How to insulate???

31. Cantilevered Floor Blocking Who does what, when? Ductwork in cavity must maintain R value

32. Dropped Soffit – Framer Interior Wall Exterior Wall Must be insulated before soffit installation v

33. Dropped Soffit – Air Sealer Interior Wall Exterior Wall Must be insulated before air barrier installation

34. Skylight Air Barrier

35. Fireplace Wall Air Barrier Must be insulated before air barrier installation

36. GARAGE BAND JOIST AIR BARRIER Incorrect Correct Filler blocking much harder shape with Engineered lumber Filler blocking much simpler shape with dimensional lumber Two types of joist-gaps created between garage and conditioned space.

37. Air Blocking and Insulation Behind Tub or Shower Must be insulated before air barrier installation

38. Air Blocking Needed for Fire Code

39. Plumber

40. Needs to insure • Exterior walls are insulated and an air barrier installed prior to installing tubs or showers on exterior walls • Needs to do normally • R-2 insulation on a circulation hot water system with automatic or manual switch to turn off system when not in use (cost factor in bid)

41. Air Blocking and Insulation Behind Tub or Shower Must be insulated before air barrier installation

42. Electrician

43. Needs to do normally • Provide IC airtight rated recessed lights installed to manufacture’s specifications • Prescriptive - 50% or more of permanently installed lighting be high-efficacy • Compact fluorescent lamps, T-8 or smaller diameter linear fluorescent lamps

44. Recessed Lighting Fixtures Type IC rated, and labeled with no penetrations between the inside of the recessed fixture and ceiling cavity (sealed and caulked) Sealed with a gasket or caulk between housing and wall or ceiling covering Type IC rated, in accordance with ASTM E 283 to be an “Air-Tight” enclosure

45. Prescriptive RequirementsLighting Equipment • Applies to lamps in permanently installed lighting fixtures • Requires 50% to be high-efficacy • Compact Fluorescent • T-8 Linear Fluorescent • Lamps with a minimum efficacy of • 60 lumens per watt (for lamps > 40 watts) • 50 lumens per watt (for lamps < 15 watts) • 40 lumens per watt (for lamps fr0m 15 to 40 watts)

46. HVAC Contractor

47. Needs to know • Location of the thermal envelop • Is the house meeting energy by Performance certification • Insulation levels including windows and doors on blueprint for load calculations • The estimated air leakage rate

48. Needs to provide • Estimated duct leakage rate • Heating and cooling load calculation using Manual J or approved software • R-8 supply ducts in unconditioned attic unless house is Performance Certified then R-6 • R-6 for all other ducts in unconditioned spaces • Sealed duct work that can pass duct test and meet estimate used for load calculations

49. Needs to provide (continued) • One programmable thermostat • Heat pump control to prevent backup heat operation in mild weather • R-3 insulation on all piping carrying fluids over 105°F or under 55°F

50. Mandatory RequirementsControls Programmable Thermostat At least 1 thermostat for each separate heating and cooling system. Programmable thermostat required when forced-air furnace is primary heating system Heat Pump Supplementary Heat Controls for heat pumps with supplementary heat