MID-CONSTRUCTION BLOWER DOOR TESTING February 15, 2017

Transcription

1 MID-CONSTRUCTION BLOWER DOOR TESTING February 15, This webinar was made possible with a financial contribution from Natural Resources Canada through the Driving BC Demand for Energy Star for New Homes Program

2 Housekeeping I Organizers: Chris Birchall + Torsten Ely Attendees: More than 32 builders, energy advisors and building officials signed up and most are on-line Duration: 1 hour webinar Please complete brief feedback survey (comes up after webinar ends) Slides will be available along with any Q&As 2 *This webinar was made possible with a financial contribution from Natural Resources Canada through the Driving BC Demand for Energy Star for New Homes Program

3 Housekeeping II Audio/Video problems If the above doesn t help, call Citrix support (tollfree): , press 1, then 1 3 *This webinar was made possible with a financial contribution from Natural Resources Canada through the Driving BC Demand for Energy Star for New Homes Program

4 Torsten Ely, Dipl.-Ing., CEM Senior Building Energy Analyst, German trained Civil Engineer, Certified Energy Manager (CEM), Energy Advisor (EA), Trainer for Energy Advisors for City Green, Certified Thermographer (ASNT Level 2), Over 20 years of experience in the building energy efficiency field, Over 15 years of experience with teaching building science. 4

5 Working with an Energy Advisor

6 About City Green A non-profit A+ Rating with Better Business Bureau Operating since 1999 Over 30,000 home and business energy evaluations Services include: education, research, diagnostic testing, quality assurance, and more. 6

7 7 Common Leakage Sites

8 Why Air Sealing? 1 metre 1 metre 1 metre 2 x 2 cm hole 1 metre Transport via air leakage through 2 x 2 cm hole 30 litres Transport via diffusion through 1 sq. metre 1/3 litre 8 Figure 2.10 Source: CHBA Builders Manual Moisture Transport Over One Heating Season (Ottawa Conditions)

9 Condensation in Wall Assemblies 21 C -18 C (50% RH, 21 C) 9 Source: BSI-049 Confusion About Diffusion

10 10 Why Air Sealing?

11 11 Why Air Sealing?

12 Why Air Sealing? Unintentional airflow through holes and cracks in the building envelope leads to a number of problems, including comfort issues from drafts, mould and moisture problems, outside noise transmission, uncontrolled heat loss/gain from interior air being replaced by exterior air. 12

13 Air Changes per 50 Pa Local Standards for Airtightness 5.5 Average New Home In B.C. 3.5 City of Vancouver 2.5 ENERGY STAR 1.5 R Passive House 13

14 14 Step Code Standards for Airtightness

15 Too Airtight? A house can never be too airtight but it can be under-ventilated! 15

16 16 BC Building Code

17 BCBC: Airtightness An air barrier system installed to meet the requirements.. shall be continuous a) across construction, control and expansion joints, b) across junctions between different building materials and assemblies, and c) around penetrations through all building assemblies. 17

18 Construction of Air Barrier Details Where the air barrier system consists of flexible sheet material, all joints shall be a) lapped not less than 50 mm, b) sealed, and c) structurally supported. 18

19 19 Sandwich Effect

20 A (5)(b) Sealing the Air Barrier System with Sheathing Tape One method of sealing air barrier materials at joints and junctions is to apply sheathing tape that has an acceptable air leakage characteristic, is compatible with the air barrier material and resistant to the mechanisms of deterioration to which the air barrier material will be exposed. 20

21 21 The Secret of Choosing the Right Tape

22 The Secret of Choosing the Right Tape What do you need it for (Seaming, Flashing)? Know your construction materials. Know your conditions. 22

23 A (9) Sealing the Air Barrier around Windows, Doors and Skylights A continuous seal between windows, doors and skylights and adjacent air barrier materials can be achieved by various means including applying exterior sealant, interior sealant, low-expansion foam or sheathing tape in combination with drywall, polyethylene, a closed-cell backer rod, or a wood liner. 23

24 A (14) Sealing Duct Penetrations Article requires that joints in all ventilation system ducting be sealed with mastic, metal foil duct tape or sealants specified by the manufacturer. Sentence (14) requires that penetrations made by ducts through ceilings or walls be sealed with appropriate sealant materials and techniques to prevent air leakage. 24

25 A (6) Exterior Air Barrier Design Considerations Any airtight assembly whether interior or exterior will control air leakage for the purpose of energy efficiency. However, the materials selected and their location in the assembly can have a significant impact on their effectiveness with regard to moisture control and the resistance to deterioration of the entire building envelope. 25

26 Air Barrier Approaches for Wood-Frame Construction SP AD HW SS 26 Source: Building Science Corporation

27 27 Sealed Polyethylene

28 28 Airtight Drywall

29 29 House Wrap

30 30 Sealed Sheathing

31 When is a home ready for the test? For Sealed Polyethylene Approach, when: The air barrier (Polyethylene) is installed and fully sealed The home is ready for the insulation inspection, prior to the installation of drywall For Airtight Drywall Approach, when: The air barrier (drywall) is installed and fully sealed 31

32 When is a home ready for the test? For House Wrap Approach, when: The air barrier (sealed-sheathing membrane) is installed and fully sealed Prior to the installation of insulation and drywall For Sealed Sheathing Approach, when: The air barrier (sheathing) is installed and fully sealed Prior to the installation of insulation and drywall 32

33 33 Source: Energy Efficiency Requirements for Houses in British Columbia Slab Foundation Wall

34 Foundation to Sill Plate and Rim Joists 34 Source: Energy Efficiency Requirements for Houses in British Columbia

35 35 Source: Building Enclosure Design Guide Foundation to Sill Plate and Rim Joists

36 Foundation to Sill Plate and Rim Joists 36 Source: R22+ Effective Walls in Wood-Frame Construction in British Columbia

37 37 Source: Energy Efficiency Requirements for Houses in British Columbia Interior Wall Interface

38 38 Source: CHBA Builders Manual Interior Wall Interface

39 39 Source: Energy Efficiency Requirements for Houses in British Columbia Rim Joist

40 40 Rim Joist

41 41 Rim Joist

42 42 Rim Joist

43 43 Rim Joist

44 44 Rim Joist

45 45 Source: Building Enclosure Design Guide Rim Joist Wrap

46 46 Source: Energy Efficiency Requirements for Houses in British Columbia Cantilevered Floor

47 47 Source: Energy Efficiency Requirements for Houses in British Columbia Window Head/Jamb/Sill

48 48 Windows

49 49 Windows

50 50 Source: BSC Stuck on You Windows

51 51 Source: BSC Stuck on You Windows

52 52 Source: BSC Stuck on You Windows

53 53 Source: Energy Efficiency Requirements for Houses in British Columbia Mechanical Flues and Chimneys

54 54 Mechanical Flues and Chimneys

55 55 Mechanical Flues and Chimneys

56 Mechanical Flues and Chimneys 56 Source: BC Standards of Practice Guide for Air Sealing and Insulation Retrofits

57 57 Source: Energy Efficiency Requirements for Houses in British Columbia Plumbing Stacks

58 58 Source: CHBA Builder s Manual Plumbing Stacks

59 59 Source: BC Standards of Practice Guide for Air Sealing and Insulation Retrofits Plumbing Stacks

60 60 Plumbing Stacks

61 61 Source: Energy Efficiency Requirements for Houses in British Columbia Skylights

62 62 Skylights

63 63 Source: Energy Efficiency Requirements for Houses in British Columbia Attic Hatches

64 64 Source: Energy Efficiency Requirements for Houses in British Columbia Pot Lights

65 65 Pot Lights

66 66 Source: BC Standards of Practice Guide for Air Sealing and Insulation Retrofits Pot Lights

67 67 Pot Lights

68 68 Source: BC Standards of Practice Guide for Air Sealing and Insulation Retrofits Bathroom Fans

69 69 Source: Energy Efficiency Requirements for Houses in British Columbia Wall to Ceiling

70 70 Source: R22+ Effective Walls in Wood-Frame Construction in British Columbia Wall to Ceiling

71 71 Source: CHBA Builder s Manual Wall to Ceiling

72 72 Wall to Ceiling

73 73 Source: Energy Efficiency Requirements for Houses in British Columbia Electrical Penetrations in Walls

74 74 Electrical Penetrations in Walls

75 75 Airtight Electrical Boxes

76 76 Electrical Penetrations in Walls

77 77 Electrical Penetrations in Walls

78 78 Electrical Penetrations in Ceilings

79 79 Electrical Penetrations in Walls

80 80 Electrical Penetrations in Ceilings

81 81 Air Sealing Problems

82 82 Air Sealing Problems

83 83 Air Sealing Problems

84 84 Spray Foam

85 85 Spray Foam

86 86 Spray Foam

87 87 Identifying Air Leakage: Smoke Pencils

88 88 Identifying Air Leakage: Thermal Imaging

89 89 Identifying Air Leakage: Good old days and ways

90 90 Smoke Machines

91 91 Marking of Air Leakage Areas

92 Air Sealing Materials o Spray Foam o Acoustical Sealant o Tape 92

93 93 Resources

94 Thank you! Torsten Ely, City Green Solutions