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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Ditto again. 3” is plenty for extensive type roofs with sedum cultivation. Cultivating the root system to retain the soil becomes issue. Spray systems with chopped sedum and gum binder (similar to what they spray on highway banks with seedings) is my preference though I don’t think it is widely used. Can hold soil on a roof slope easily until roots take over.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I don’t get what the glass over the plantings is for? Why not a regular deck over membrane and gravel (sandblasted glass if you want as a decking – still slippery) with equivalent mass in plantings in planters? <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Greenbuilding [mailto:greenbuilding-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>David Wentling<br><b>Sent:</b> January-25-13 8:33 AM<br><b>To:</b> Green Building<br><b>Subject:</b> Re: [Greenbuilding] Green Roof under deck<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='background:white'><span style='font-family:"Arial","sans-serif";color:black'>There are proven systems with 3" soil depths with sedum systems. Conservation Technology out of Baltimore offers a thin, light weight system. To protect the glass deck in summer from being a greenhouse, consider using outdoor carpet as a shade system. Attach for wind control. Indirect sun should be OK for most sedums. <br><br>You stated that the deck would be open on two sides and attached to walls on two sides. Consider a 2" gap along the walls to encourage ventilation. Plan for uplift loads!!<br> <o:p></o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Arial","sans-serif";color:black'>David Wentling<br>ConservFirst.com<o:p></o:p></span></p></div><div><div><div><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> Tim Brown <<a href="mailto:tim34@optonline.net">tim34@optonline.net</a>></span><span style='color:black'><o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='color:black'>I've followed some of your posts and<br>like your approach to work in the big apple.<br>Feisty clientele me thinks.<br>I'm 25 years in business doing roof gardens in Manhattan and a few in<br>Brooklyn.<br><br>When you say 3" green roof are you referring to soil depth?<br>This sounds a bit to shallow . I believe the light version of <br>green roof design calls for double that depth and only allows for use of<br>sedum type planting ( no glass). 12" soil depth gives greater options for planting . <br><br>Covering with glass might work in winter but<br>not in summer for sure. You are sort of describing a cold frame<br>set up.<br><br>Weight issues are always a concern especially on brownstones unless<br>you are reworking roof structure. <br><br>Hard to give feed back with out some more clarification. <br>If decking is up 2' off roof surface than you have good depth for planting.<br><br>On Jan 24, 2013, at 5:34 PM, Gennaro Brooks-Church - Eco Brooklyn wrote:<br><br>> I just salveged some tempered glass. I have a client who wants me to<br>> build a 3" green roof on his brownstone plus a deck that sits 2' above<br>> the roof.<br>> I suggested a glass deck and green roof under it.<br>> He is concerned the vegetation under the glass deck will not survive<br>> since it will bake in the summer.<br>> Are there any experienced landscapers on this list who can offer their<br>> experience?<o:p></o:p></span></p></div></div></div></div></body></html>