Challenging Framing Details Energy Design Conference & Expo - February 26-27, 2013 - Duluth, MN 1
What does Framing Provide? 2
Framing provides the... Structural Integrity 3
Framing provides the... Enclosure for Mechanicals 4
Framing provides the... Support for Finish Materials 5
Framing provides the Foundation for...... Air-Sealing and Thermal Performance 6
So Every Home can be Safe...... Durable, Comfortable, and Energy Efficient 7
Dave Hepfler Photo Was this Safe? 8
Was this Durable? 9
Was this Comfortable? 10
Was this Energy Efficient? 11
Marilou Cheple Photo Was this Energy Efficient or Durable? 12
Stack Effect in Winter 13
DIFFUSION DIFFUSION DIFFUSION 4x8 sheet of gypsum board Interior at 70º F and 40% RH Test Period was One Cold Climate Heating Season 1/3 quart of water DIFFUSION DIFFUSION Adapted from: Lstiburek, J. 2004. Builder s Guide to Cold Climates. Building Science Corporation Moisture Movement by Diffusion 14
4x8 sheet of gypsum board with 1 in 2 hole Interior at 70º F And 40% RH Test Period was One Cold Climate Heating Season 30 quarts of water Air Leakage Adapted from: Lstiburek, J. 2004. Builder s Guide to Cold Climates. Building Science Corporation Air Transported Moisture 15
Joe Nagan Photo First Condensing Surface in the Attic 16
Joe Nagan Photo Is this Condition Sustainable? 17
Moist Air is NOT Filtered Out 18
What is missing from this Attic Kneewall? 19
Ceiling Height changes Elevation 20
Blocking needed at Bottom of Kneewall 21
Add Sheathing at Exterior Side of Kneewall 22
Insulation should Fill the Cavities Completely 23
Remove Strapping to Avoid a Bypass 24
Walls need Top Plates Roofs need Insulation 25
Where do the Top Plates go? 26
Add Blocking to Complete the Assembly 27
A Good Way to do a Story and a Half 28
Where are the Boundaries Here? 29
Add the Bottom Plate and Exterior Sheathing 30
Seal the Remaining Gaps 31
What is Floor and What is Attic? 32
Well Defined Boundary 33
Looks like a Rim Treat it like a Rim 34
Bonus Room Framing Challenge 35
Foamed against a Housewrap Backer 36
Seal Framing Connections when Using Foam 37
Another Way to Finish the Wall 38
Can You See the Garage Down There? 39
Can You Find the Gaps? The Electrician did. 40
Interior Gable Challenge 41
Enclosed on All Six Sides? 42
How to Have it Both Ways 43
Terry Lenhart Photo Less Framing More R-Value 44
Exterior Wall Attic Space Interior Wall 45
This is How the Insulator Finished the Job 46
Exterior Wall above a Vaulted Ceiling 47
Attic Archway Connection is Open 48
As Found Condition in a Home 49
Flow Reversed by Blower Door 50
The Cause Looked like This 51
What Size Drill Bit was Used Here? 52
How are these two holes different? 53
Insulation is NOT an Air Seal 54
Not Quite Finished 55
Who Put That in the Way? 56
Room to Work 57
Structural Modification 58
Existing Chase Lid was Removed 59
Chase is now Open to the Attic 60
Gap below plenum filled and chase lid sealed 61
Solid Lids should be Sealed in Place 62
Multi-level Tray Ceiling Trusses 63
Kitchen Soffits Open to Attic 64
Arch Open to Attic and Wall Cavities 65
Archway Open to Attic and Chase 66
Flat Lid Sealed to All Irregularities 67
How many Leaks in this Panned Return? 68
How Many Cavities are Connected? 69
What is this Supply Duct Connected To? 70
Thermal Boundary? Pressure Boundary? 71
Air Barrier in Contact with Warm Side? 72
Thermal and Pressure Boundaries not Aligned 73
What is This Opening Bringing into the Wall? 74
How Durable will This Wall Assembly be? 75
Double Wall with Boundaries in Alignment 76
Filling Both Cavities Also Works Well 77
Complex Boundary Definition Challenge 78
How the Challenge was Successfully met 79
Identify the Framing Defects 80
Identify the Framing Defects 81
Identify the Framing Defects 82
Identify the Framing Defects 83
Identify the Framing Defects 84
Identify the Framing Defects 85
Identify the Framing Defects 86
Identify the Framing Defects 87
Identify the Framing Defects 88
Identify the Framing Defects 89
Identify the Framing Defects 90
Identify the Framing Defects 91
Identify the Framing Defects 92
Identify the Framing Defects 93
Identify the Framing Defects 94
Identify the Framing Defects 95
Thank You References and Acknowledgements Marilou Cheple photo: slide number 12 Dave Hepfler photo: slide number 8 Terry Lenhart photo: slide number 44 Joe Lstiburek diagrams: slides number 14 and 15 Joe Nagan photos: slides number 16 and 17 University of Minnesota Extension is an equal opportunity educator and employer This material is available in alternative formats upon request. Direct requests to Richard Stone, Extension Educator at 612-624-7712 2009, Regents of the University of Minnesota. All rights reserved. 96
Challenging Framing Details Framing provides more than just the structure of a building and something to hang the exterior and interior finishes from. It also creates enclosures for insulation and provides the basis for effective air-sealing. Getting the framing details right makes all the difference when it comes to delivering a finished home that is safe, healthy, durable, comfortable, and energy efficient. This session addresses the little details that all builders should know, but are often missing from blueprints and detail pages. Framing Overview Air transported moisture Incomplete framing assemblies Mechanical Framing penetrations Framing cavities used as ducts Thermal and pressure boundary misalignment 97