I have been hounding John lately about green roofs (also called vegetative or living roofs). Specifically, how we might access the roof for maintenance and weeding (safely), how to walk around on the roof (safely), whether to construct a parapet or ridge at the roof line to prevent him from falling off the roof ("
You'll shoot your eye out!"), and so on.

Fortunately for John, for our marriage, and for the hypothetical green roof on our cabin, I have overcome those fears. How? By walking around on a green roof.
We have talked to green roof folks (distributors, installers, nurseries) and in the process have discovered a dearth of residential green roofs around Richmond. Most of them are installed on city high-rise buildings, with vastly different ecosystems than our roof would have. Ssubstitute lots of shady trees for glaring sun, and add squirrels to the mix for starters.
So we decided to investigate the one residential green roof that we had heard of in Richmond, which has the added advantage of being well-established, and having gracious owners who are happy to share information.
Karen Raschke and Donald Creach had already conceived of the idea of a green roof when they got a little help from
Hurricane Isabel, "the costliest disaster in the history of Virginia". The "little help" was provided by a massive tree that fell across the roof of their Riverside Drive home in 2003. (That alone is an amazing story, but I'll let Karen or Don tell you about it, if you are lucky enough to meet them.) In the process of rebuilding, they took the opportunity to install a green roof, which was installed in 2004.
A number of people and groups have toured the Raschke/Creach home since the installation of their green roof, and we had read a few articles about it, like
this one. Unfortunately, Don was out of town when we visited, but getting to know Karen was a real treat. We have a lot of interests in common, and had a wonderful time talking about art, books,
Rosmy, zoning requirements, and even such mundane but fascinating things as
Runtal radiators.
Back to their roof, though. Karen had pulled out their architectural drawings and plans, articles, and a book by the man who designed their roof plantings, Edmund Snodgrass (
Green Roof Plants: A Resource and Planning Guide). One thing we noticed, as soon as we drove up their drive, was that there were some lovely, tall onion-type plants with purple flowers bordering the roof, and waving gently in a friendly manner. Seeing the roof from on top really showed off its beauty, though. We got a ladder and the three of us climbed up.
First, my safety concerns. We are considering green roofs in two places on the cabin: the small overhang right next to and slightly below the living room windows will be our "test" garden, to see how well it does in our ecosystem and how much maintenance is required; that room is just single story height. Then, if our test roof is successful, we'll likely install a large green roof on the master bedroom/bath addition -- this roof would be two stories high. What I discovered, walking around atop Karen's roof, was that the pitch of the roof is so gentle, I felt very comfortable, even when I was near the edge of the roof. Her roof is edged with paver stones, and as I pulled a few weeds (there weren't many) I could walk right to the edge to toss them off without being nervous. I am confident, that with a similarly pitched roof, I would be comfortable even at the height of a second floor. So the field trip was worth it for that discovery al

one! Plus so much more.
One thing we were curious about was the moss growing in a few areas of the planted green roof. It wasn't part of the design, but it did look attractive, and it didn't seem to us that it would likely be detrimental to the roof or the other plantings due to the shallow roots of the moss. There was a nice variety of plants, growing in a planting medium that was covered with tiny volcanic gravel (which is, of course, very light). There were patches where the plant cover wasn't as solid, but in general it covered the area pretty thoroughly. It looked lovely, and it was so peaceful and quiet up there. Karen had a little portable chair to sit on, and it occurs to me that it would be desirable to have access to the roof not only to be able to weed and maintain it, but also to enjoy it, just as we did that day at Karen's.
I was able to let go of one of my fears, gain a lot of useful information and helpful ideas, and make a new friend. What a great way to spend a lovely Sunday! Thanks, Karen.