STEVEN BACZEK

What is Thermal Bridging?• A reduction of the effectiveness of insulation to reduce conductive heat

flow through the building envelope otherwise know as “heat loss”

• Concrete, steel reduce the thermal effectiveness of insulation by up to 50%

• Wood reduces the thermal effectiveness of insulation by 15 to 20%

• Windows may reduce the effectiveness by 30%

• Heat loss means inefficient energy use

• How do we fix this problem?

- Reduced Thermal Bridging

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How do we reduce Thermal Bridging?

• Better application of thermal insulation– More insulation– Installed properly – Grade 1– Reduce the areas where it can be bridged

• How?– Advanced Framing or OVE

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OPTIMUM VALUE ENGINEERINGOPTIMUM VALUE ENGINEERING

TYPICALLY CALLED “OVE”

“OVE” IS A SERIES OF CHOICES,NOT A METHOD OF WOODFRAME CONSTRUCTION

ADVANCED FRAMING USES THE“OVE” CONCEPT

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WHAT IS THE OVE CONCEPT?WHAT IS THE OVE CONCEPT?

• OPTIMUM Best or most favorable condition / best result

• VALUE Relative worth, merit, or usefulness / equivalent return

• ENGINEERING Art and science of practical application

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WHY USE OVE?WHY USE OVE?

• Improve current project quality• Eliminate unnecessary costs• Reduce initial cost• Reduce life cycle costs• Solve existing problems

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OVE EXAMPLES YOU ARE USINGOVE EXAMPLES YOU ARE USING

• 2x4 vs 2x6 Framing• 16” vs 19.2” vs 24” Framing centers• Trusses vs Stick framed roof• Solid sawn floor vs Engineered floor system• OSB vs Plywood vs Insulating Sheathing

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WHAT IS ADVANCED FRAMING?WHAT IS ADVANCED FRAMING?

• The Optimum use of wood framing

• Provides the most Value per unit cost

• The most practical Engineered application of a wood frame

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Align framingMembersTo providematerial efficiency

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StackFramingConcept

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Wall Framing Elevation

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SingleTopPlateConnections

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InsetRimJoist

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Insulated Header Options

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Trussed Header

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Exterior Corner Framing Options

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Interior Partition Framing Options

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Stretch Code RequirementsNew Thermal Enclosure Checklist (THE) will be a requirement for Stretch Code in 2011- From Energy

Star 3, which includes new section 4 belowhttp://www.energystar.gov/ia/partners/bldrs_lenders_raters/downloads/InspectionChecklists.pdf

4. Reduced Thermal Bridging:

• 4.1 Raised-heel truss or equivalent framing / insulation method used in the attic 8

• 4.2 HVAC and other attic platforms installed to allow for full-depth insulation below

• 4.3 Reduced thermal bridging at walls using one of the following options:

– 4.3.1 Continuous rigid insulation sheathing, insulated siding, or combination of the two;

– > R-3 in Climate Zones 1-4, > R-5 in Climate Zones 5-8 9,10, OR;

– 4.3.2 Structural Insulated Panels (SIPs), OR;

– 4.3.3 Insulated Concrete Forms (ICFs), OR;

– 4.3.4 Double-wall framing11, OR

– 4.3.5 Advanced framing, including all of the items below: • 4.3.5a All corners insulated > R-6 to edge12, AND;

• 4.3.5b All headers above windows & doors insulated13, AND;

• 4.3.5c Framing limited at all windows & doors14, AND;

• 4.3.5d All interior / exterior wall intersections insulated15, AND;

• 4.3.5e Minimum stud spacing of 16" for 2 x 4 framing and 24" for 2 x 6 framing unless construction documents specify other spacing is structurally required16

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Cost Implications of Advanced Framing

• Architecture

• Studs, Plates, Headers

• Sheathing

• Mechanical Fasteners

• Training

• Frame Labor

• Drywall labor

• Insulation

NET RESULT

• Not more if done at start

• Significant savings – 25%

• More - 5/8” vs. 1/2”

• More –Plates, clips, hangers

• More – retrain framing crew

• Should be less

• A little more

• A little more, but this is the end goal

• Eventually 10-20% savings

STEVEN BACZEK

THANK YOU