why building and energy codes? - iccmedia.iccsafe.org/geo/docs/whybuildingenergycodes.pdf ·...
TRANSCRIPT
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Why Building and Energy Codes?
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Consumer Expectations When you purchased your home or commercial building did you have any expectations of how the structure would perform?
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Many would expect that when
• It rained the inside would stay dry
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Many would expect that when
• It snowed the roof would support the added weight
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Many would expect that when
• It was windy the building would stand
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Many would expect that when
• You turned on the faucet there was hot water and it was on the left side
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Many would expect
• That the drains drain
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Many would expect that
• It would be reasonably comfortable
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Building and Energy Codes Intent:
The purpose of any of the International family of codes is to establish minimum requirements to safeguard the public safety, health and general welfare through;
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Building and Energy Codes
• Affordability
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Building and Energy Codes
• Structural strength
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Building and Energy Codes
• means of egress facilities
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Building and Energy Codes
• energy conservation
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Building and Energy Codes
• stability
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Building and Energy Codes
• sanitation
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Building and Energy Codes
• light and ventilation
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Building and Energy Codes
• safety to life and property from fire and other hazards
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Living up to the expectation
• So what are some things that we can be doing to our buildings so that they live up to the expectations of those who buy them?
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1. Define the Thermal Envelope
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2. Protect the Thermal Envelope
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Air Barriers
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Air Leakage
• The following shall be caulked, gasketed, weather-stripped or otherwise sealed with an air barrier material, suitable film or solid material:
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#1 All joints, seams and penetrations.
© 2011 Colorado Code Consulting, LLC LC
23 WB 44
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#1 All joints, seams and penetrations.
© 2011 Colorado Code Consulting, LLC LC
24 WB 44
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#2 Site-built windows, doors or skylights
© 2011 Colorado Code Consulting, LLC 25 WB 44
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#2 Site-built windows, doors or skylights
© 2011 Colorado Code Consulting, LLC 26 WB 44
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#3. Openings between window and door assemblies and their respective jambs and framing.
© 2011 Colorado Code Consulting, LLC 27 WB 44
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#3 Openings between window and door assemblies and their respective jambs and
framing.
© 2011 Colorado Code Consulting, LLC 28 WB 44
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From Building Science Corp.
© 2011 Colorado Code Consulting, LLC
29
www.buildingscience.com
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#4 Utility penetrations.
© 2011 Colorado Code Consulting, LLC 30 WB 44
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#5 Dropped ceilings or chases adjacent to the thermal envelope
© 2011 Colorado Code Consulting, LLC 31 WB 44
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#6 Knee Walls
© 2011 Colorado Code Consulting, LLC 32 WB 44
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#7 Walls and ceilings separating a garage from a conditioned spaces.
© 2011 Colorado Code Consulting, LLC 33 WB 44
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#7 Walls and ceilings separating a garage from a conditioned spaces.
© 2011 Colorado Code Consulting, LLC 34 WB 44
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#8 Behind tubs and showers on exterior walls
© 2011 Colorado Code Consulting, LLC 35 WB 44
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#8 Behind tubs and showers on exterior walls
© 2011 Colorado Code Consulting, LLC 36 WB 44
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#9 Common walls between dwelling units
© 2011 Colorado Code Consulting, LLC 37 WB 44
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38
The Problem
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#10 Attic access openings
© 2011 Colorado Code Consulting, LLC 39
Courtesy of US Department of Energy
WB 44
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#11 Rim joist junction
© 2011 Colorado Code Consulting, LLC 40
BuildingsScience.com
WB 44
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#12 Other sources of infiltration
© 2011 Colorado Code Consulting, LLC 41 WB 44
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Glazing
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Ceiling Insulation
© 2009 Colorado Code Consulting, LLC 43
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Ceiling/Roof Insulation
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Ceiling Insulation
© 2009 Colorado Code Consulting, LLC 45
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Ceiling Insulation
© 2009 Colorado Code Consulting, LLC 46
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Roof Assemblies - Metal Buildings
Example: • Climate Zones 6 requires two
layers of insulation (R-13 + R-19) Per Table 502.2(1)
Per Table 502.2(2):
• R-13 faced fiberglass batts draped over purlins.
• R-19 unfaced fiberglass batts installed parallel to the purlins.
• Minimum R-3.5 thermal spacer block placed above the purlin/batt, and roof deck is secured to purlins.
Thermal Blocks
Insulation
Draped Over
Purlin
Insulation
Parallel to Purlin
Picture from NAIMAThermal Blocks
Insulation
Draped Over
Purlin
Insulation
Parallel to Purlin
Picture from NAIMA
47 © 2011 Colorado Code Consulting, LLC
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Roof/Ceiling Insulation
© 2009 Colorado Code Consulting, LLC 48
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Roof/Ceiling Insulation
© 2009 Colorado Code Consulting, LLC 49
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Roof/Ceiling Insulation
© 2009 Colorado Code Consulting, LLC 50
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Wall Insulation
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Wall Insulation
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Wall Insulation
OOPS!
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Above Grade Walls
© 2009 Colorado Code Consulting, LLC 54
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Above Grade Walls
© 2009 Colorado Code Consulting, LLC 55
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Floor Insulation Floor insulation shall be installed to maintain permanent contact with the underside of the subfloor decking.
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Floors Over Outside Air
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Slab on Grade Foundations
NO
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Slab Edge Protection
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Basements
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Vented Crawl Spaces
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Unvented Crawl Spaces
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Attics
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Garages
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2. Size the mechanical equipment properly
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Residential Mechanical
• Houses are tighter than they used to be
• Insulation is better than it used to be
• Windows are better than they used to be
• It becomes more important to put more thought into the size of equipment needed for a home. The old “Rule of Thumb” just doesn’t cut it anymore.
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Commercial Mechanical
• “Control Issues” : Commercial mechanical equipment should be designed with controls with capabilities to:
• Turn things down or off when not needed, • Have programmable thermostats that allow varied
settings and abilities to operate equipment during power failures
• Reduce outside air when it’s not required • Provide outside air instead of chilled air when it is
economical to do so • Sequencing operations on multiple units • Reduce pump flows when applicable • Change fan speeds when applicable
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Duct Leakage and Insulation
Seal all joints and seams
Ducts in unconditioned spaces need insulation!
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Duct Design
• You designed your equipment to the way you built your building, now design the ducts to deliver the air appropriately.
• When you don’t feel the right amount of air from your duct work, you turn up the heat or cooling. What you need to do is design the duct work correctly from the beginning.
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3. Lighting
• Recessed lighting installed in the building’s thermal envelope should be rated to be in contact with insulation (IC rated)
• And should have seals and gaskets to limit air leakage.
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Residential Lighting
• Use high efficacy bulbs in your permanent fixtures.
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Commercial Lighting
• More “Control Issues”: Commercial lighting should be designed to allow the user to turn the lights down by at least 50% when they can. This can be done with dimmer switches, controls that allow you to shut some lamps off and not others, or occupancy sensors
• Also, controls should be provided to allow for holiday scheduling and after hour shutoffs.
• Always have at least one control for the lighting in each room the lighting serves. Don’t make me go into another room to turn the lights on for the room I need to be in.
• Exterior lighting should have controls that shut it off when it’s light enough outside that you don’t need it
• And then put some thought into which occupancies need more wattage than others and design appropriately.
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Pools
© 2009 Colorado Code Consulting, LLC 73
If you heat your pool To over 90 degrees, it Should have an insulated cover
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Flexibility and Options
• ResCheck/ComCheck
• Performance Path
• ASHRAE 90.1
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Free Adoption Assistance
• Need help with code adoption?
• Have questions about code adoption?
• Want someone to talk to your City Council?
• Want someone to attend public meetings to answer questions?
• Give us a call, we can help – for FREE!
Shaunna Mozingo, (303)598-3465
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Thank you!!
Energy Code Support Partnership
Brought to you by:
Colorado Governor’s Energy Office
Department of Local Affairs, Div. of Housing
Colorado Code Consulting
International Code Council
Energy Logic