Why Building and Energy Codes? - ICCmedia.iccsafe.org/geo/docs/WhyBuildingEnergyCodes.pdf ·...

Why Building and Energy Codes?

Consumer Expectations When you purchased your home or commercial building did you have any expectations of how the structure would perform?

Many would expect that when

• It rained the inside would stay dry

• It snowed the roof would support the added weight

• It was windy the building would stand

• You turned on the faucet there was hot water and it was on the left side

Many would expect

• That the drains drain

Many would expect that

• It would be reasonably comfortable

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;

Building and Energy Codes

• Affordability

• Structural strength

• means of egress facilities

• energy conservation

• stability

• sanitation

• light and ventilation

• safety to life and property from fire and other hazards

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?

1. Define the Thermal Envelope

2. Protect the Thermal Envelope

Air Barriers

Air Leakage

• The following shall be caulked, gasketed, weather-stripped or otherwise sealed with an air barrier material, suitable film or solid material:

#1 All joints, seams and penetrations.

23 WB 44

#1 All joints, seams and penetrations.

24 WB 44

#2 Site-built windows, doors or skylights

#3. Openings between window and door assemblies and their respective jambs and framing.

#3 Openings between window and door assemblies and their respective jambs and

framing.

From Building Science Corp.

www.buildingscience.com

#4 Utility penetrations.

#5 Dropped ceilings or chases adjacent to the thermal envelope

#6 Knee Walls

#7 Walls and ceilings separating a garage from a conditioned spaces.

#8 Behind tubs and showers on exterior walls

#9 Common walls between dwelling units

The Problem

#10 Attic access openings

Courtesy of US Department of Energy

#11 Rim joist junction

BuildingsScience.com

#12 Other sources of infiltration

Glazing

Ceiling Insulation

Ceiling/Roof Insulation

Ceiling Insulation

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

Roof/Ceiling Insulation

Wall Insulation

Above Grade Walls

Floor Insulation Floor insulation shall be installed to maintain permanent contact with the underside of the subfloor decking.

Floors Over Outside Air

Slab on Grade Foundations

Slab Edge Protection

Basements

Vented Crawl Spaces

Unvented Crawl Spaces

Attics

Garages

2. Size the mechanical equipment properly

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.

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

Duct Leakage and Insulation

Seal all joints and seams

Ducts in unconditioned spaces need insulation!

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.

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.

Residential Lighting

• Use high efficacy bulbs in your permanent fixtures.

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.

If you heat your pool To over 90 degrees, it Should have an insulated cover

Flexibility and Options

• ResCheck/ComCheck

• Performance Path

• ASHRAE 90.1

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

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

Why Building and Energy Codes? - ICCmedia.iccsafe.org/geo/docs/WhyBuildingEnergyCodes.pdf ·...

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