Talk:Green roof
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[edit] Information request
Hi I am looking for some specifics on elements for a sod roof to span a ring 15' radius (lower roof for a 60' circle). The posts are 11'6" apart. What do I have to use for rafters and purlins to support such a roof? One can reply directly to tipmusic@yahoo.com
The 'Green Roof Regulations' section contains large amounts of assertions and broad generalizations that are not cited and obviously author opinion, e.g.
"The building industry in the United States tends to look for instant pay-offs rather than long-term investments."
and the author of this section has an obvious agenda to encourage readers to promote the use of green roofs (not that I disagree, I think green roofs are great, I just think that a wikipedia article isn't the place to espouse one's beliefs). Perhaps a section such as 'Promoting the use of green roofs' should be added, and facts, not author suggestions, regarding other's efforts to promote green roofs could be included.
- I've eliminated some of the essay-style writing and conclusions - more work is needed. BD2412 T 00:16, 16 May 2006 (UTC)
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- This is a complex issue related to the rise of Green building. In the US price to performance ratios and return on investment (ROI) are considered to be among the most important characteristics of any building. It is only recently that improved techniques have proven to save substantial costs over the lifetime of a building. Now green certified construction is becoming common and corporate centers are increasingly targeting LEED certification at platinum level compliance. So there is a fragment of truth to the remarks, historically, but the issue is more complex and important than the current article states. -- M0llusk 00:31, 14 October 2006 (UTC)
[edit] Expansion
Hi, I just went through and added a lot of documented and fact-based information about green roofs, as well as further editing out the many judgmental statements about why people (particularly builders) do and don't use green roofs. I renamed several sections to simply focus on history, uses and benefits (again, rather than making assumptions about motives), and added a short section on disadvantages. If there's any other data or information I can provide, please let me know. July 7, 2006 - KatherineKatherineN 16:14, 7 July 2006 (UTC)
Realized I probably should have removed the NPOV tag following my edits, and did so now. KatherineN 21:11, 8 July 2006 (UTC)Katherine.
[edit] Merge
Hi,
Looking for an instant pay-off vs. long-term investment... What is a building all about, an instant pay-off? Anyway, talking about green roofs and modern green roof technology sometimes leads to judgmental statements because it is a very emotional topic. There is the 'green' group vs. the conservative group. All things are emotional related to nature, flowers and/or gardens . Let's merge everything down to a generalized level: Since nature doesn't need us, do we need nature at all? If so, how much, and who tells us the quantity of nature we are allowed to have? 25 years and many millions of square foot green roof converted me to a 'green' guy. Jorg Breuning--Jörg Breuning 13:54, 29 August 2006 (UTC)
- I have removed a link to an external website from the contribution above. It has been pointed out to Jörg Breuning on his talk page that self-promotion and links to commercial websites are against the principles of Wikipedia. Please, Jörg, do not add any more links to your own website. SiGarb | Talk 16:52, 29 August 2006 (UTC)
[edit] green roof...cool building
Hi! My name is TIP, and I am building a big circular place in Lanark County, Ontario. Right now I am looking for info on roofs to support an 8"layer of soil. I am using reclaimed 12" diameter posts and 10" beams from my property for the frame of a 60' diameter circular building wit a central tower. The tower roof is conventional, the lower roof is a ring 15' in diameter surrounding the central tower. The pitch is 4/6 and the span between posts is 11'6" on center. What sizes and kind of rafters ,purlins,kneewalls (for lookouts)etc do I need to use??? Where can I find this kind of info??? Reply here or to tipmusic AT yahoo DOT com Thanks
[edit] green roofs aka living roofs
Hello, I've never edited an entry, but I thought that the intro paragraph should mention the fact that green roofs are also commonly called living roofs -- which would be good for cross referencing. And for some reason the intro paragraph doesn't have one of those [edit] boxes next to it. The other paragraphs did not seem as appropriate for the cross reference.
Does anyone know the distinctions between green vs living roofs? I was recently told that a living roof might be more accurate, since a "cool roof" (a roof which is painted a light color to reflect heat) may also qualify as a "green" roof, in the sense that green simply means environmentally friendly. CindyBlain 05:46, 8 January 2007 (UTC)
[edit] What is a green roof
In the introduction it is suggested that container gardens are not green roofs. however this is not always the case. I am not editing this remark as it is too lengthy to explain the qualities that makes a container garden a green roof or not, however if you consider the fact tha all a green roof is essentially is a (or number of) giant container(s) it becomes clear that the statement referred to is erroneous.
Secondly it should be noted that the term "green roof" can also be applied to roofs that are designed with an environmentally friendly concept in mind, such as solar panels for electricity production or heating. (----) —The preceding unsigned comment was added by MarcusHawksley (talk • contribs) 22:20, 1 February 2007 (UTC).
[edit] temperature differential
The article currently states "On Chicago's City Hall, by contrast, which features a green roof, roof temperatures on a hot day are typically 25–80 degrees Fahrenheit (14–44 degrees Celsius) cooler than they are on traditionally roofed buildings nearby." I admit that the reference supports this, but it is clearly wrong. For example, the National Weather Service supplies historical statistics that contradict the upper end of this range. The hottest temperature ever observed in Chicago during July was 105 Fahrenheit, in 1934; the coldest July temperature was 45 F, in 1983, a different of only 60 degrees. Admittedly, these figures are from a limited set of measuring stations, but it is clear that an 80 degree separation between adjacent roofs is impossible. Note that if one roof was at 105 F, the highest temperature ever recorded in Chicago, then the roof of City Hall would be (with an 80 degree difference) at 25 F, below freezing. It is beyond unlikely that the roof of City Hall is covered in snow and ice during the hottest heat waves in history.
If we can't find an accurate reference, I'll remove this claim from the article. Tesseran 20:55, 5 August 2007 (UTC)
- You are confusing ambient air temperature with roof temperature. I've cooked eggs on a black tile roof, and I have melted polystyrene insulating foam pressed against galvanised steel roofing (polystyrene has a melting point above boiling - it is commonly used for insulated coffee cups!). A 40C difference seems quite plausible. Read Selective surface.--Jaded-view 17:36, 15 September 2007 (UTC)
