Best Practices

Compliant spaces show illumination levels of 25–500 footcandles (

The daylight simulation should represent clear-sky conditions at both 9:00 a.m. and 3:00 p.m. on the equinox (March 21st or September 21st).

The simulation must calculate daylight levels on a grid 30 inches above the ground at a maximum of five-foot intervals.

Regularly occupied spaces are those in which workers are seated or standing as they work during the day. In residential applications, regularly occupied spaces include all spaces except bathrooms, closets, and other storage or utility areas. Non-regularly occupied spaces include corridors, bathrooms, storage, and mechanical rooms.

Your project building can automatically earn this credit if it previously earned a credit related to Daylight and Views through LEED for New Construction, LEED for Schools, or both LEED for Core and Shell and LEED for Commercial Interiors.

Determine the load-bearing capacity of the building before investigating different vegetated roofing types. Consider these issues: 

• the weight of the system, 
• maintenance issues and access, 
• upfront and long-term costs, 
• and irrigation needs.

Vegetated roofs consist of layers that are generally installed as a layered system or all at once as a set of interlocking trays: 

• waterproofing membrane, 
• root barrier, 
• drainage layer, 
• lightweight soil or engineered growing medium, 
• and vegetation.

High-

If roof replacement is not necessary, project teams can investigate coatings that are applied to a roof retroactively to increase the

Quantify areas covered by any mechanical equipment or other appurtenances such as plumbing stacks, air vents, skylights, and solar panels. These areas will be deducted from the total roof area when calculating compliance in the LEED Online credit form.