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EarthCraft: Insulating Strategies Energy Efficient Insulation Systems by Church Hill Homes.

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Presentation on theme: "EarthCraft: Insulating Strategies Energy Efficient Insulation Systems by Church Hill Homes."— Presentation transcript:

1 EarthCraft: Insulating Strategies Energy Efficient Insulation Systems by Church Hill Homes

2 What is an EarthCraft House? Green Building Certification Program Green Building Certification Program Based on a point systemBased on a point system 3 rd party certification3 rd party certification Gives builders flexibilityGives builders flexibility Adopted by HBAVAdopted by HBAV Local/National marketing supportLocal/National marketing support Brand recognitionBrand recognition Heavy emphasis on Energy EfficiencyHeavy emphasis on Energy Efficiency 150 points: 75 min, 85 max on Energy Efficiency150 points: 75 min, 85 max on Energy Efficiency

3 Your Home Loses and Gains Heat In 3 Ways Convection- The transfer of heat by moving air Convection- The transfer of heat by moving air Conduction- The transfer of heat through a solid material Conduction- The transfer of heat through a solid material Radiation- The transfer of heat in the form of electromagnetic waves Radiation- The transfer of heat in the form of electromagnetic waves R-value is a laboratory measurement of only one heat transfer mechanism (conduction) and does not effectively measure all 3 of the above methods, therefore R-value alone will not tell you how well the insulation will perform in your home.

4 Heat Gain / Loss (cont.) +50% of a homes energy loss is due to random air leakage (convection) +50% of a homes energy loss is due to random air leakage (convection) +50% of a homes energy loss occurs in overhead areas (ceilings, vaults, overhangs, etc…) +50% of a homes energy loss occurs in overhead areas (ceilings, vaults, overhangs, etc…) Batts come in a handful of standard sizes while only 30% of framing cavities are standard. Batts (whether made from fiberglass, cotton, blue jeans, etc…) are not effective in controlling random air leakage (convection) Batts come in a handful of standard sizes while only 30% of framing cavities are standard. Batts (whether made from fiberglass, cotton, blue jeans, etc…) are not effective in controlling random air leakage (convection)CONCLUSIONS 1. Control random air leakage (convection) w/ use of a custom fit, spray applied insulation (open or closed cell foam, cellulose, or fiberglass) 2. Address ceilings FIRST! This is the most critical component of the building envelope. 3. Control radiant heat loss w/ use of unvented attic assembly.

5 Unvented Attics Air-impermeable insulation required Air-impermeable insulation required Insulation applied to underside of roof deck w/ no insulation separating attic from living area Insulation applied to underside of roof deck w/ no insulation separating attic from living area ICC-ES Legacy report required for exposed insulation in roof deck ICC-ES Legacy report required for exposed insulation in roof deck Eliminate all passive ventilation (gable, soffit, and ridge vents) Eliminate all passive ventilation (gable, soffit, and ridge vents) Mechanical ventilation is required Mechanical ventilation is required Reduce HVAC equipment sizing Reduce HVAC equipment sizing Brings HVAC equipment and duct work into conditioned space Brings HVAC equipment and duct work into conditioned space Improved indoor air quality Improved indoor air quality Eliminate condensing surfaces Eliminate condensing surfaces Section of 2006 IRC Section of 2006 IRC

6 Conditioned Crawl Spaces Brings HVAC equipment, Air Handler, and Ducts into conditioned space. Brings HVAC equipment, Air Handler, and Ducts into conditioned space. Duct leakage is lost into building envelope. Duct leakage is lost into building envelope. Eliminate moisture intrusion and control relative humidity. Eliminate moisture intrusion and control relative humidity. Improved indoor air quality Improved indoor air quality Creating a mini basement, insulating the foundation walls instead of crawl ceiling Creating a mini basement, insulating the foundation walls instead of crawl ceiling Supply air only (no return) to pressurize crawl at 1cfm per 50 square feet. Supply air only (no return) to pressurize crawl at 1cfm per 50 square feet. ICC-ES Legacy report required for exposure of foundation insulation. ICC-ES Legacy report required for exposure of foundation insulation.

7 Cellulose Wall-Spray Cavity filling insulation system Cavity filling insulation system Made from recycled materials Made from recycled materials Great sound and air infiltration performance Great sound and air infiltration performance Cost effective- minimal upgrade expense Cost effective- minimal upgrade expense

8 Open-Cell Foam Superior Air-seal Superior Air-seal Total Project system- used in roof decks, walls, crawl spaces, overhangs, etc.. Total Project system- used in roof decks, walls, crawl spaces, overhangs, etc.. Low flame spread and smoke development Low flame spread and smoke development ICC-ES Legacy Report NER-420 for use in unvented attics ICC-ES Legacy Report NER-420 for use in unvented attics Can be left exposed in attics or crawl spaces w/out use of ignition/thermal barrier. Can be left exposed in attics or crawl spaces w/out use of ignition/thermal barrier. Open cell structure allows bulk water intrusion w/ drying capability Open cell structure allows bulk water intrusion w/ drying capability

9 Closed-Cell Foam Superior Air-seal Superior Air-seal High R-value High R-value Typically used in walls as part of a flash and batt system Typically used in walls as part of a flash and batt system Requires use of an ignition/thermal barrier (can NOT be left exposed in unvented attics or crawl spaces) Requires use of an ignition/thermal barrier (can NOT be left exposed in unvented attics or crawl spaces) Closed cell structure does not allow bulk water intrusion. Closed cell structure does not allow bulk water intrusion.

10 Hybrid Insulation System Hybrid Insulation System Open-Cell foam to condition attic areas. Includes garage ceilings, overhangs, jebs. Open-Cell foam to condition attic areas. Includes garage ceilings, overhangs, jebs. Cellulose Spray Wall System in exterior walls Cellulose Spray Wall System in exterior walls

11 Hybrid Insulation System Hybrid Insulation System Earns 63 of the 75 minimum EarthCraft points for Energy Efficient features. Earns 63 of the 75 minimum EarthCraft points for Energy Efficient features. Including 35 points for Blower Door pressure test. Including 35 points for Blower Door pressure test. Addresses most critical envelope areas while controlling cost. Addresses most critical envelope areas while controlling cost. EarthCraft mandatory insulation/envelope requirements (NO points) Conditioned attics eliminate the majority of theses requirements. Conditioned attics eliminate the majority of theses requirements. Examples:-sealing/calking all interior drywall penetrations (light fixtures, supply boots, can lights, etc…) (light fixtures, supply boots, can lights, etc…) -insulating and weather stripping attic accesses -Insulating knee walls to R-19 w/ minimum R-5 foam board sheathing foam board sheathing

12 REM Design-Performance

13 Selling Features and Benefits Up to 50% reduction in heating/cooling costs Up to 50% reduction in heating/cooling costs Reduces HVAC equipment sizing Reduces HVAC equipment sizing Exceeds DOE Recommendations Exceeds DOE Recommendations Improved Indoor Air Quality Improved Indoor Air Quality Improved Sound Control Improved Sound Control Happy, Comfortable Homeowners (no callbacks) Happy, Comfortable Homeowners (no callbacks) Distinguishes you from competition Distinguishes you from competition (most other builders dont offer it!)

14 Questions and Comments ? ?


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