Tuesday, December 14, 2010

Greenroof Installation

This pictures shows the different components of a typical green roof. The product we are using for this install is xeroflor. This type of system can be installed on virtually any type of roofing membrane. On the bottom left you can see the root membrane being installed. This is followed by drain mat designed to allow moisture that percolates through the sedum mats to run off towards the scupper. On the top right you can see the moisture retention fleece. This acts as a water reservoir that will supply moisture to the plants during periods without rainfall. Finally the sedum mats are installed (see bottom left). Clients often ask me about the possibility of a green roof on their residential property. Here are some tips and guidelines for a typical residential project.
1) initial phone call and consultation
2) engineer report (requires hole in ceiling to examine roof joists)
3) working backward from engineer report decisions can now be made regarding system, accessible vs. inaccessible, depth of soil and type of plants.
4) architect may be required to submit drawing to city for permit
5) quote, contract and scope of work agreement
6) safety plan for installation (notice both Rachel and Rohan are tied off)
7) installation!
8) monitoring and maintenance
It has been my experience that a typical residential green roof project takes about 1 year to go from step 1 through 7! so patience is a virtue.
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