Amedean Messan wrote:Fantastic post Dale!
Jay C. White Cloud wrote:Hi Dale,
This was an outstanding post to share with folks. Thanks so much for presenting it.
This really does demonstrate what green roofs can be like, even if they are not planned for. If you have a solid roof frame, and build your layers up properly (many different ways to do that) any low pitch roof can sustain a "green layer." Moss for the wetter climates like yours is great and sedums for the dry ones.
If you actually design the roof to be a "growing roof," you can plant even more.
I was talking with my dad on Sunday, about green roofing and the need to get away from disposable asphalt, which both of us considered an obsolete technology.
I know it is a small consolation at this time, but I could not think of something (at least to me) more comforting and pleasing to discuss before a passing. Moss has always been one of my most cherished living things to be around, to grow, and nurture. Moss and lichen gardens are some of the most enchanting gardens I have ever been part of.
Moss, underlain with gravel was the last thing that we talked about.
As you should, and you are correct in your thinking. To not try and make the mosses and lichens a focal point of "pacific northwest" planting systems is obtuse. With little effort they will naturally enhance any space or surface with little nurturing. Your notion is wonderful.
It was a bit of a eureka moment. Millions are spent getting rid of the very plant that makes the most sense to promote in my climate. I hung up the phone feeling more confident than ever that this is the way to go.
P Lyons wrote:Any idea what is going wrong with my image insertion. I tried photo bucket and some other program?
Preview is not working for me, so i don't find out images aren't included until it is submitted. Thought I followed instructions I saw posted elsewhere.
P Lyons wrote:Dale, lots of great photos and info on this post. I have been wanting to replace an existing asphalt shingle roof with a green roof.
Located in Ontario, Canada we can get lots of snow load. It is a simple A-Frame cabin, we get water seeping through now in several locations during heavy rains or when lots of snow build up starts melting, so time to replace.
The cabin is shaded by pines and hemlock, so the roof naturally becomes covered in evergreen needles, with moss growing on the shingles. I would like to maintain the current look but with a roofing strategy designed for the purpose.
What I would like to do is to:
1 - remove the asphalt shingle
2 - repair any roof decking that is required.
3 - Lay down a protective barrier, cardboard, newspaper or filter cloth
4 - lay down epdm membrane
5 - lay down a protective layer for the membrane
6 - Allow roof to be covered with evergreen needles, sticks and moss.
I am looking for comments on materials noted above and any potential alternatives. I would also be looking for some installation details ie how to best attach the membrane and different layers.
Below are a couple of photos. Thanks in Advance.
Roberto pokachinni wrote:What surprises me about this roof, and some other seriously mossy roofs I've seen in this province, is that there are no tree seedlings taking off in it, which I have seen in some locations in moss and in needle debris. I would think that with that much debris, and moisture retaining moss that hemlocks, spruce, pines, and other acid lovers would be all about inhabiting this niche as it progresses.
I have considered this to be the ultimate roofing solution for a long time, and the only maintenance being the gutter/swale/drain rock and drain screens, as well as the rooting out of the tree seedlings. Maybe the rooting out of the trees wont be necessary after all, if this is an indication.
Being a rainforest child myself, I wonder, considering the vast amount of water that the mosses can hold, just how much more the roof weighs in the Victoria winter, as opposed to the driest part of the summer.
Also, I thought instantly that such a roof, if watered in the dry part of the summer, could produce a massive cooling effect (swamp cooler) for the house (in addition to the one caused by it's insulation).
I really enjoyed this thread and the living bathroom thread that brought me here. Thanks Dale. You and I think a lot alike.