Civil Engineering & Architecture

2.3 Residential Design –Affordable Housing

Civil Engineering & Architecture

2.3.4 Adding up to Green

Habitat for Humanity – Affordable Housing

NOTE: Merge the client needs to Habitat for Humanity’s construction guidelines

• ½ Acre Site– 1046 Maple Ave, Noblesville,

Indiana 46060

• Size of the House– 2 Bedroom/1 Bathroom - 900

sf (40 gal. water heater)– 3 Bedroom/1-1/2 Bathroom -

1070 sf (52 gal. water heater)– 4 Bedroom/2 Bathrooms -

1233 sf

Habitat for Humanity Guidelines(abridged)

– NOTE: Merge the client needs to Habitat for Humanity’s construction guidelines

• Size of the House– 2 Bedroom/1 Bathroom - 900 sf (40 gal. water heater)– 3 Bedroom/1-1/2 Bathroom - 1070 sf (52 gal. water heater)– 4 Bedroom/2 Bathrooms - 1233 sf

• Type of Construction– Foundation

• Crawl Space: 4’ deep & 36”x24” access panel• Basement: 8’ deep with interior & exterior access• Slab• Drainage is gravity flow or sump pump• NOTE: Do not include basement unless required by city code.

Habitat for Humanity Guidelines(abridged)

• Type of Construction (cont’d)– Wall System

• Wood Frame System: 2”x6” sheathed with ½”board insulation

• Concrete System: standard methods

– Roof System• Truss 16” apart on center with 7/16” Oriented

Strand (A.K.A. Wood Particle) Board• Gable Roof with 5/12 pitch

Habitat for Humanity Guidelines(abridged)

• Accessibility per ADA– Entrance with no porch, step or overhang/

– Doors are 36” wide– Hallways are 42” wide

– Kitchen have 5’ diameter of open space to move

– 1 Bathroom must be accessible– Each bathroom has grab bars

Habitat for Humanity Guidelines(abridged)

• Energy Efficiency per LEEDS & Energy Star– Insulation– Heating & Cooling– Appliances– Home Electronics– Lighting

– uses at least 15% less energy than standard homes

Habitat for Humanity Guidelines(abridged)

• Insulation– Wood Frame: R-19 value, fiberglass batt insulation

and ½ insulating foam– Ceiling: R-38 blown in insulation– Foundations Walls: 2” blue board foam & 6 mil paper

retarder

• Doors– 2 Steel Clad Insulated Doors

• Primary Door: 6 panel with half moon light• 3’ wide

– Attic accessible

Habitat for Humanity Guidelines(abridged)

• Windows– white, vinyl, single hung, tilt-in, low e double pane

with screens– Every bedroom must have at least 1 window– Kitchen/Dining: at least 2 windows– Basement: egress windows– Linen Closet– Build in Closet on First Floor

NOTE: An egress window is a window that is required in specific locations in a dwelling and is intended to provide an emergency means of exiting a dwelling. Windows must meet specific size and requirements to qualify as an egress window.

Habitat for Humanity Guidelines(abridged)

• HVAC, Washer/Dryer, & Plumbing– Electric Heat Pump– Water Heater (see above for size)– Washer/Dryer Area with Installation– Hose Bibs (2): exterior

• Lighting Fixtures– Ceiling fixtures in all rooms– Fluorescent light fixture with switch in each closet– Light fixture over sinks in bathroom and kitchen– Light fixture at Porches and Entrances

LEED Certification Process

1. Contact LEED for Homes Provider and register the project with the USGBC..

2. Identify a project team, including the LEED-H AP/Consultant.

3. Build the home to the stated goals and have green measures verified by a Green Rater and qualified energy rater (HERS in CA).

4. Achieve certification as a LEED home.5. Post-certification PR and marketing support.

LEED’s Home Size Threshold Adjustment Formula

Threshold adjustment = 13 * log (actual home size / neutral home

size) / log (2).

2 Bedroom: 13* Log (900/1400) / Log (2)= -8.23

Find Award Adjustment

LEED’s Home Size Award Adjustment Formula

LEED’s Home Size Award Adjustment Formula Example

LEED’s Home Size Adjustment Chart

LEED’s Home Size Adjustment Chart

LEED’s Certification2 Bedroom / 900 sf