thinking about spring and green roofs (again)

As we gear up for spring I've been surfing the net looking for the cheapest and most effective way to finish up the top of the breezeway. As we have discovered time and time again, those two goals aren't always compatible. so really we are looking for the best possible compromise. One option we're exploring is a green roof.

• http://www.doityourself.com/stry/green-roof-construction-mistakes-to-avoid#b
• http://www.thisoldhouse.com/toh/how-to/intro/0,,20473692,00.html
• http://www.mnn.com/your-home/at-home/stories/how-to-install-a-green-roof
• http://forums.gardenweb.com/forums/load/permacult/msg0108565831976.html