D
Structural Frame and Building Envelope
Note: This measure is only available to homes with three floors or less.
D9.
The overhang distance is measured horizontally from the outer edge of the fascia board or rafter tail to the finish siding( not to the outer edge of the gutter). Gutters must discharge at least five feet from the foundation( either above or below ground). The water may be discharged into the public storm drain system( including a driveway leading to the storm drain system), a rainwater catchment system, or a planting bed that is able to accept larger amounts of water without erosion occurring( due to a deliberate depression, such as a swale, or a high infiltration rate area, such as a gravel-filled drain bed).
Rain chains do not qualify as downspouts, unless they are 24 inches from the home, do not splash on the home, and have deliberate drainage pathways discharging at least 5 feet from the foundation, as described previously.
VERIFICATION
Field Verification: The Rater will conduct field compliance verification and take photos of overhangs and gutters.
Documentation: Plans may be required with dimension of overhang depth.
INTENT
To improve the durability of exterior surfaces by reducing the exposure to water and sun. To reduce the potential of moisture-related problems by positively draining water away from the foundation.
REDUCED POLLUTION ENTERING THE HOME FROM THE GARAGE
CRITERIA FOR QUALIFICATION
As a prerequisite for all criteria in this measure, no heating or cooling system ductwork or central air handlers should be present in the garage.
Up to two points of credit are available, as follows: D9.1. Detached Garage( 1 Point) A carport, detached garage, or no garage meets the intent of this measure. D9.2. Mitigation Strategies for Attached Garage( 1 Point) This measure can be met by completing one of the following: �
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DRAFT
In the attached garage, install a minimum 70 cfm fan( for non-ducted units) or 100 cfm fan( for ducted units) on the opposite wall or reasonably far from the door to the house. The fan should be hardwired and rated for continuous operation. The fan should be run continuously or should be designed with an automatic timer control( linked to the occupant sensor, light switch, or garage door opening / closing mechanism) requiring the fan to run a minimum of three air changes on each triggered cycle. Tightly seal the air barrier between the garage and the living space by using foams, weatherstripping, and caulking to create an air barrier between the garage and living areas. Completely seal the garage walls and ceilings adjacent to the home. The seal must be airtight to the drywall,
DRAFT GreenPoint Rated New Home Rating Manual 32 Version 6.0, September 2013
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