I spoke with a professor at Rutgers - and ended up adjusting the layout - to provide an
even 6" of soil depth. I havent finalized the species of Turf Grass though but I did narrow it down to a fescue mix (hard, fine, creeping and…"
"You said it there. The conditions vary on this project between the north and south side so exposure to the elements has driven the majority of our design decisions. I have two calls into Cornell (no response), I am going to contact Rutgers today as…"
"To take RH's comment "Not everything is possible with plants" further, are you preparing anything to show the client that this design element is in fact not possible.
Who's going to get sued when it fails ?
You haven't yet stated (did I miss it?) whether the site is full sun all day or part day and which part, whether it is exposed to noticeable winds, whether the building extends above this floor casting shade. In NYC a rooftop can have…"
"Since the area will be receiving some foot traffic, lounge chairs etc…It seems that maybe a grass paver type application may be applicable. If there is a light weight grass pave system you could use with the correct grass, that may be a…"
"The situation is definitely not boggy - the opposite in fact. We are using a proprietary soil blend created for green roof plantings so I'd have to do a bit of research to see if it breaks down over a given amount of time.
We are already…"
"Thanks again, I certainly will look into this. The initial thought was to hydroseed the area, however sprigs could be an interesting alternative. I'll see if its rated for traffic. If anything good comes out of this I will let you…"
"Remember that most green roofs are essentially alpine gardens. Full sun, lean soil, potentially limited water, windswept, etc. There are turf species that do well in that situation and as you stated fescues are one that will work."
"Have you ever been near a synthetic grass that has full sun exposure on a hot day ?
You mention "soil"...what's the mix ? Does it break down over time ? What is your irrigation ?
If the potential is a boggy…"
"Look into this stuff. It is a rhizomatic low-growing variety of bluegrass. It only grows to 2" or 3" meaning low/no mowing and since it is rhizomatic, it self-heals and needs much less watering. And since I first spotted it, they seem…"
"Thanks Jason, this is really helpful. I've since found ways to "increase" the soil depth to about 5". So there's a small silver lining there.
As for synthetic, yeah, thats what many others have recommended as well. Problem…"
"I'd go with synthetic turf on a roof like that. You just don't have the soil depth for proper root growth. If this was in Florida, you may have been able to use a bermuda with very heavy maintenance and replacement…"
"Thanks Rob. I can assure you that there has been a tremendous amount of time that has gone into species selection on this project. The building is approximately 1 acre with over 30 terraces - each having a very different microclimate from the…"
"As a horticulturist, I must urge you to recognize that plant selection is site specific. You must consider what region you are in, what sun/light levels and wind is like at the site, how the turf area will be used, cool season? warm season? blend?…"