experts in the business of construction products · 2012-01-18 · 1/14/2012 1 building works, inc....
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1/14/2012
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Building Works, Inc.Experts in the BusinessOf Construction Products
Concrete Homes 101
Pieter VanderWerf Building Works, Inc.
The National Association of Home Builders is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
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Learning Objectives
1. Learn basics of installation, costs and properties of available systems.
2. Discover major influences on these factors.3. Understand how to match systems to projects.4. Learn to find crews and get training and
support.
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The House
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The Concrete House
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Decisions, Decisions
Why build them? How?
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Why Build Them?
Why some buyers like them How some builders can benefit
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Why Buyers Like Them (before)
1. Energy efficiency2. Disaster resistance3. Etc.
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Why Buyers Like Them (after)
1. Comfort2. Energy efficiency3. Disaster resistance4. Sound reduction5. Etc.
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Benefits to Buyers
1. Comfort2. Energy efficiency3. Disaster resistance4. Sound reduction5. Etc.
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Benefits to Buyers
1. Comfort2. Energy efficiency3. Disaster resistance4. Sound reduction5. Etc.
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Benefits to Buyers
1. Comfort2. Energy efficiency3. Disaster resistance4. Sound reduction5. Etc.
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Benefits to Buyers
1. Comfort2. Energy efficiency3. Disaster resistance4. Sound reduction5. Etc.
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Benefits to Buyers
1. Comfort2. Energy efficiency3. Disaster resistance4. Sound reduction5. Durability,
lack of vibration
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TM
Single family residential impacts…MIT Report on Methods, Impacts and Opportunities
in the Concrete Pavement Life-Cycle
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MIT Concrete Sustainability Hub Research Center established at MIT in 2009
Industry Collaboration
Portland Cement Association
Ready Mixed Concrete Research and Education Foundation
Mission:
Accelerating emerging breakthroughs in concrete science and enhancing the sustainable nature of concrete
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Buildings Based Life Cycle Analysis Comprehensive Full LCA
Examining materials within whole building context
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Single Family LCA Single family residential
Comparison of wood frame and concrete
Only the exterior wall systems differ
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TM
Single Family LCA Study looks at differences
between wood frame and insulating concrete forms based on:
Quantity of insulation in each wall assembly
Impact of thermal mass
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Single Family LCA Study does not include
impact of differences in air infiltration
Comparisons assume air tightness the same for wood and ICF structures
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Key Finding: Concrete homes have higher embodied GWP associated with Pre-Use Phase
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Key Finding: Concrete homes produce 5 to 8% lower GHG emissions than current best practice code compliant wood frame residences
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ChicagoICF ChicagoWood PhoenixICF PhoenixWood
GWP(kgCO2e/m
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GWP(lbsCO
2e/ft2)
End‐of‐Life
Use
Pre‐Use
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Key Finding: Concrete homes use 8 to 11% less energy than code compliant wood frame construction
Chicago
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MIT Concrete Sustainability Hub Key Findings: Single-Family Residential LCA
Optimization:
Increase % of supplemental cementitious materials
Fly Ash
Ground Granulated Blast Furnace Slag
Silica Fume
If increased from 10% to 50% of cement content
3 to 4% reduction in embodied emissions over 60 years
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TM
MIT Concrete Sustainability Hub Key Findings: Single-Family Residential LCA
Optimization:
Reduce thickness of concrete core from 6” to 4”
Meets structural requirements
Cost effective
Reduces embodied emissions
Does not appreciably impact thermal mass benefit
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MIT Concrete Sustainability Hub Key Findings: Single-Family Residential LCA
Optimization:
Increase thickness of ICF foam insulation
Increase to 4” optimizes performance and cost effectiveness
Beyond 4” value of carbon emissions saved offset by increased material costs
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MIT Concrete Sustainability Hub Key Findings: Optimized Foam
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MIT Concrete Sustainability Hub Key Findings: Single-Family Residential LCA
Optimization:
Improving air tightness
Represents greatest potential for additional improvement
Improved from average to tight saves 23% of total operating energy
Loose construction vs. tight results in $300 in savings per year
TM
Single family residential impacts…MIT Report on Methods, Impacts and Opportunities
in the Concrete Pavement Life-Cycle
Why Build Concrete?
More people will buy People will pay more Builder subsidies and promotional benefits It’s exciting
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Higher Demand
More people will buy People will pay more Builder subsidies and promotional support It’s exciting
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Higher Demand
High-end Customers “Green” developments High-wind areas Public or subsidized
housing
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Higher Demand
High-end Customers Will pay for features Fond of “green”
“Green” developments High-wind areas Public or subsidized housing
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Higher Demand
High-end Customers “Green” developments
Green program points Publicity/differentiated
High-wind areas Public or subsidized housing
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Higher Demand
High-end Customers “Green” developments High-wind areas
Requirements Insurance benefits Peace of mind
Public or subsidized housing
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Higher Demand
High-end Customers “Green” developments High-wind areas Public or subsidized housing
Occupant bears maintenance and energy cost Authority subsidizes initial cost
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Builder Subsidies & Promotions
Concrete Homes Subsidy Federal Energy Tax Credit Local utility benefit Energy Star certification Insurance discount Concrete Promotion
Program
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Builder Subsidies & Promotions
Concrete Homes Subsidy $2,000 Federal Energy Tax Credit $2,000 Local utility benefit $1,500 Energy Star certification Promo benefit Insurance discount Buyer savings Concrete Promotion Triple adv’g
Program + PR
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It’s Exciting
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How to Build Them
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Concrete Wall Systems
Block Insulating Concrete Forms (ICFs) Removable Forms (RFs) Precast Panels
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Block
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Block
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Block
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Block
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ICFs
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ICFs
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ICFs
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ICFs
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ICFs
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ICFs
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Removable Forms
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Removable Forms
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Removable Forms
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Removable Forms
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Removable Forms
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Removable Forms
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Removable Forms
Insulation
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Removable Forms
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Precast
Closed panels
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Precast
Open Panels
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Precast
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Cost in the Heartland
Construction cost/unit
1 20 40 60 80 Units
Wood frame
BlockICFRemovable formsPrecast
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Cost in High-End Custom
Construction cost/unit
1 20 40 60 80 Units
Wood frame
Block
ICF
Removable formsPrecast
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Cost in the Heartland
Construction cost/unit
1 20 40 60 80 Units
Wood frame
BlockICFRemovable formsPrecast
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Cost in Volume
Construction cost/unit
1 20 40 60 80 Units
Wood
BlockICF
Removable formsPrecast
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Cost in Volume
Construction cost/unit
1 20 40 60 80 Units
Wood
BlockICF
RFPrecast
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Cost in Florida
Construction cost/unit
1 20 40 60 80 Units
WoodBlock
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Cost in High-Wind Areas
Construction cost/unit
1 20 40 60 80 Units
WoodBlockICF
RFPrecast
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Cost Near Precast Homes Plant
Construction cost/unit
1 20 40 60 80 Units
WoodPrecast
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Concrete Wall Systems
Block Insulating Concrete Forms (ICFs) Removable Forms (RFs) Precast Panels
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Block Selection Factors
In high-wind area In high block-use area (like FL)
Crews and equipment Local officials familiar
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ICF Selection Factors
In high-wind area Custom Home
Properties buyers want Flexibility
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Removable Forms Selection Factors
In high-wind area Development
Low cost Benefits of concrete
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Precast Panels Selection Factors
In high-wind area Near precast plant
Close costs
Development Even closer costs
Site speed important
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Finding Crews
Walls Electrical HVAC
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Wall Crews
Block ICFs RFs Precast
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Wall Crews
Block Plentiful in FL Recruit local basement or commercial crew
ICFs RFs Precast
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Wall Crews
Block ICFs
Directory of ICFA: www.forms.org(distributors)
RFs Precast
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Wall Crews
Block ICFs RFs
Structura service: www.structuratech.com
Precast
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Wall Crews
Block ICFs RFs Precast
Find a plant www.pci.org or
www.ncpa.org
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Electrical Crews
Pull, cut in, or conduit Ask wall contractors, be prepared to educate
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HVAC Contractor
Need accurate sizing Ask HERS rater (www.natresnet.org)
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The Concrete House
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This concludes The American Institute of Architects Continuing Education Systems Program
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Building Works, Inc.Experts in the BusinessOf Construction Products
Concrete Homes 101
Pieter VanderWerf Building Works, Inc.