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--></style></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:windowtext'>There are any number of composites made with recycled plastics and/or wood pulp; very long-lasting, no/low maintenance, and lacking PVC. Look for hollow-core versions for lighter weight.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:windowtext'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-family:Calibri;color:black'>From: </span></b><span style='font-family:Calibri;color:black'>Greenbuilding <greenbuilding-bounces@lists.bioenergylists.org> on behalf of Lynelle Hamilton <lynelle@lahamilton.com><br><b>Reply-To: </b>Green Building <greenbuilding@lists.bioenergylists.org><br><b>Date: </b>Thursday, August 25, 2016 at 8:24 AM<br><b>To: </b>Green Building <greenbuilding@lists.bioenergylists.org><br><b>Subject: </b>Re: [Greenbuilding] Decking a Boathouse Roof<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:windowtext'><o:p> </o:p></span></p></div><div><div><p><span style='font-family:Helvetica'>Thanks, John.</span><o:p></o:p></p><p><span style='font-family:Helvetica'>I appreciate your perspective. I had a rooftop deck at my last house and used it a lot, so am pretty certain that this one will get used. I too, hate the thought of vinyl, but it seems that it's the simplest (and probably the least resource intensive) response and will address the pressing issue...the leaking roof. Just wish there was an alternative to vinyl for the decking that would be as waterproof and durable.</span><o:p></o:p></p><p><span style='font-family:Helvetica'>Lynelle</span><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 2016-08-25 12:58 AM, John Salmen wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'>The simplest roof assembly is structure (roof joists/sheathing of some sort), insulation (type 1 eps) roof board (typically fiberglass/ashphalt ½” thing – mechanically fastened), two part roof system on top of that (screw fastened base sheet/ adhered top sheet). Every roof supply company has the same basic system – can look at soprema. Will run about 5 to 8 can per square foot in cost depending on local contractors and size of roof/ details etc. That is a current flat roof – not a vinyl deck – vinyl deck will be comparable and probably simpler.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'>The roofing weight is minimal in itself as most roofs would carry at least 10llbs per foot for dead load (sheathing, ceiling drywall, roofing) – a wood deck added on top would add about 15lbs per sq. ft. dead load extra so you would need to look at the framing and see if it meets current environmental load requirements (things have changed) and if that could be added. Carpenters love to make decks as they get to rebuild them 10 years later</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'>Sheathing the deck in plywood and then putting a vinyl deck surface is crappy but would keep the weight load down and use less materials so environmentally is probably a better solution – fewer trees used. They tend not to leak except at odd upright seams and will outlast wood finishes and replacement is better than replacing a wood deck.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'>I hate giving this type of advice as I know environmentally the vinyl deck solution is actually less destructive but is a horrible solution. As a designer I would ask if anyone would ever use the deck.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'> </span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:Calibri;color:black'> </span><o:p></o:p></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:Tahoma;color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:Tahoma;color:windowtext'> Greenbuilding [<a href="mailto:greenbuilding-bounces@lists.bioenergylists.org">mailto:greenbuilding-bounces@lists.bioenergylists.org</a>] <b>On Behalf Of </b>Lynelle Hamilton<br><b>Sent:</b> August-24-16 9:28 PM<br><b>To:</b> Green Building<br><b>Subject:</b> [Greenbuilding] Decking a Boathouse Roof</span><o:p></o:p></p></div></div><p class=MsoNormal> <o:p></o:p></p><p><span style='font-family:Helvetica'>I have a boathouse on my property with a flat roof that, surprisingly. leaks. I would like to put a deck on the roof, as the structure is strong enough to support it. However, I am stumped as to the best material to use to get a durable and waterproof surface that is walkable. My carpenter suggests rubber membrane, the styrofoam, then a wood deck, but I have concerns about the weight, plus the weight of folks on it. As well, maintenance might be an issue. Duradeck, etc are seem hardly to be green alternatives. Any ideas, folks?</span><o:p></o:p></p><p><span style='font-family:Helvetica'>Many thanks in advance.</span><o:p></o:p></p><p><span style='font-family:Helvetica'>Lynelle</span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><table class=MsoNormalTable border=1 cellpadding=0 style='border:none;border-top:solid #D3D4DE 1.0pt'><tr><td width=55 style='width:41.25pt;border:none;padding:9.75pt .75pt .75pt .75pt'><p class=MsoNormal><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank"><span style='border:solid windowtext 1.0pt;padding:0in;text-decoration:none'><img border=0 width=46 height=29 id="_x0000_i1025" src="cid:image001.jpg@01D1FEB6.A047FB70" alt="mage removed by sender."></span></a><o:p></o:p></p></td><td width=470 style='width:352.5pt;border:none;padding:9.0pt .75pt .75pt .75pt'><p class=MsoNormal style='line-height:13.5pt'><span style='font-size:10.0pt;font-family:Arial;color:#41424E'>Virus-free. <a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank"><span style='color:#4453EA'>www.avast.com</span></a> </span><o:p></o:p></p></td></tr></table><p class=MsoNormal><span style='color:windowtext'> </span><o:p></o:p></p><p class=MsoNormal><span style='color:windowtext'><br><br><br><o:p></o:p></span></p><pre>_______________________________________________<o:p></o:p></pre><pre>Greenbuilding mailing list<o:p></o:p></pre><pre>to Send a Message to the list, use the email address<o:p></o:p></pre><pre><a href="mailto:Greenbuilding@bioenergylists.org">Greenbuilding@bioenergylists.org</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>to UNSUBSCRIBE or Change your List Settings use the web page<o:p></o:p></pre><pre><a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org">http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</a><o:p></o:p></pre></blockquote><p class=MsoNormal style='margin-bottom:12.0pt'><span style='color:windowtext'><o:p> </o:p></span></p><table class=MsoNormalTable border=1 cellpadding=0 style='border:none;border-top:solid #D3D4DE 1.0pt'><tr><td width=55 style='width:41.25pt;border:none;padding:9.75pt .75pt .75pt .75pt'><p class=MsoNormal><span style='color:windowtext'><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank"><span style='border:solid windowtext 1.0pt;padding:0in;text-decoration:none'><img border=0 width=46 height=29 id="_x0000_i1026" src="cid:Word%20Work%20File%20D_213818069.jpg" alt="mage removed by sender."></span></a><o:p></o:p></span></p></td><td width=470 style='width:352.5pt;border:none;padding:9.0pt .75pt .75pt .75pt'><p class=MsoNormal style='line-height:13.5pt'><span style='font-size:10.0pt;font-family:Arial;color:#41424E'>Virus-free. <a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank"><span style='color:#4453EA'>www.avast.com</span></a> <o:p></o:p></span></p></td></tr></table></div></div><p class=MsoNormal><span style='color:windowtext'>_______________________________________________ Greenbuilding mailing list to Send a Message to the list, use the email address Greenbuilding@bioenergylists.org to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org<o:p></o:p></span></p></div></body></html>