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Artificial turf in Steep-sloped roof

NC-v4.1 SSc5: Heat Island Reduction
posted by weam baljoon on Sep 19, 2022, 9:18 am

Can anyone clarify for NC-v4.1 SSc5 Option 1 Roof and Non-Roof - if Steep-sloped roof is covered with Artificial turf (decretive finish) and the product is within the minimum solar reflectance...

Are substations registered within a LEED project?

LEED Guidance for Campuses and Multiple Buildings
posted by Karim Balbaa on Jul 28, 2022, 2:09 am

Do we need to register substations within a project as separate buildings (Under Group Approach) ?  If yes, do we have to consider them for analysis under each credit. They don't have any GFA. ...

Uplights in an LZ0 zone

NC-v4.1 SSc6: Light Pollution Reduction
posted by Ellis John Mandia on Apr 11, 2022, 8:36 am

Can the percentage values prescribed in the "Maximum allowed percentage of total luminaire lumens emitted above horizontal" be taken as time-related? For example, if we have uplights in a LZ0...

Last reply: Bill Swanson, Apr 21, 2022, 9:13 am

LEED Campus V4 Matrix

LEED Guidance for Campuses and Multiple Buildings
posted by sana salman on Apr 18, 2022, 7:05 am

Hello , 

Does anyone have LEED v4 campus matric for BD+C. I downloaded LEED guidance for Campus but it has credits and Matrix for LEED 2009. 

also can i register the campus with...

Last reply: Erin Holdenried, Apr 18, 2022, 9:55 am

Fire alarm cables (Public Address system) in the hospitals

Healthcare-v4 MRc6: PBT source reduction - lead, cadmium and copper
posted by Najam Us Saqib on Apr 7, 2022, 2:54 am

Fire alarm cables are same like electrical cables, however, its function is different. The v4 LEED guide uses the words ''Electrical wiring and cabling'' under Lead requirements (...

GHG Emission Factor for Saudi Arabia

NC-v4.1 EAp2: Minimum Energy Performance
posted by Kathy Wong on Feb 17, 2022, 8:43 pm

We are trying to figure out the...

Last reply: Tyler Thumma, Mar 3, 2022, 10:25 am


NC-v4.1 WEp2: Indoor water use reduction
posted by FRAN HERRERA on Nov 8, 2021, 3:17 am

Hi dear mates,

I need to add grey water usadge to Indoor water use reduction credit. According to my calculation 100 % of the WC flush water would be reused from showerhead and sinks. ...

Last reply: emily reese moody, Nov 18, 2021, 1:07 pm

ASHRAE 90.1 2016- Mandatory Provisions- Workers` Accommodation Building

NC-v4.1 EAp2: Minimum Energy Performance
posted by Amgad Khattab on May 3, 2021, 5:56 pm

We have a Workers` accomdination building which mainly comprimes of 3 floors and each floor has 32 room. Each room has 2 single bedrooms. Whie checking complying with ASHRAE 90.1 2016 - Mandatory...

Last reply: Marcus Sheffer, May 3, 2021, 6:45 pm

Off street parking and on street parking

NC-v4 LTc7: Reduced parking footprint
posted by Azaz Ansari on Nov 21, 2017, 8:03 pm


1. Could you please explain the following statement:

    "Preferred parking is not required if no offstreet parking is provided".

2. What is difference between off...

Last reply: Claudia Mezey, Mar 1, 2021, 11:54 am

Hotel project in remote island

NC-v4 SSc6: Light Pollution Reduction
posted by Michael Aghabi on Nov 9, 2020, 5:14 am


We are designing a hotel project in a rural remote area in Saudi Arabia, and have an issue figuring out which Lighting Zone the project falls under. 

Under the MLO guidelines...

Last reply: Glenn Heinmiller, Nov 17, 2020, 10:36 am