[Greenbuilding] Decking a Boathouse Roof

[Lynelle Hamilton]

Hi Mike,

How did you attach it to the substrate? Boathouse is unfinished inside, 
but the condensation may have been the concern.

Thanks!


On 2016-08-25 1:22 PM, Michael O'Brien wrote:
> Hi, Lynelle—
>
> We had a local roofing company cut a sheet of EPDM to fit as a single 
> continuous membrane. No leaks in 8 years.
>
> A cedar deck sits on the membrane, no penetrations.
>
> Your guy may have suggested polystyrene to prevent condensation on the 
> interior ceiling of the boat house?
>
> Best wishes,
>
> Mike O'Brien
>
>
> On Aug 25, 2016, at 5:24 AM, Lynelle Hamilton <lynelle at lahamilton.com 
> <mailto:lynelle at lahamilton.com>> wrote:
>
> Thanks, John.
>
> 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.
>
> Lynelle
>
>
> On 2016-08-25 12:58 AM, John Salmen wrote:
>> 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.
>> 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
>> 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.
>> 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.
>> *From:*Greenbuilding 
>> [mailto:greenbuilding-bounces at lists.bioenergylists.org]*On Behalf 
>> Of*Lynelle Hamilton
>> *Sent:*August-24-16 9:28 PM
>> *To:*Green Building
>> *Subject:*[Greenbuilding] Decking a Boathouse Roof
>>
>> 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?
>>
>> Many thanks in advance.
>>
>> Lynelle
>>
>> <Mail Attachment.jpeg> 
>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
>> 	
>> Virus-free.www.avast.com 
>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
>>
>>
>>
>> _______________________________________________
>> Greenbuilding mailing list
>> to Send a Message to the list, use the email address
>> Greenbuilding at bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>> http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org
>
>
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> 
> 	Virus-free.www.avast.com 
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> 
>
>
> _______________________________________________
> Greenbuilding mailing list
> to Send a Message to the list, use the email address
> Greenbuilding at bioenergylists.org <mailto:Greenbuilding at bioenergylists.org>
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org
>
>
>
> _______________________________________________
> Greenbuilding mailing list
> to Send a Message to the list, use the email address
> Greenbuilding at bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
> http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org



---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/greenbuilding_lists.bioenergylists.org/attachments/20160825/c5681184/attachment.html>