Talk:Cob (material)

message: Re the 4 bedroom cob house in Worcestershire - "The total construction cost was £300 000, but the metre-thick cob outer wall cost only £20 000.." I'm not sure how this compares with ordinary houses - it's expressed as though £20 000 is cheap, but how much would an ordinary wall (or a well-insulated wall) cost in a similar house? --Singkong2005 00:40, 30 May 2006 (UTC)
replies: text: You're right, it does say it as if it's cheap, which it's not - words like "only" should really be avoided in this context as it represents a POV on what constitutes "cheap" (however if it had cited a comparison it would've been forgivable). This figure of £20,000 is probably incorrect, as it actually costs next to nothing to build a house out of cob (mud and straw is generally free! Also I've got reliable sources stating that cob houses have been built for under £1000 total cost exc. land.) even though to be fair his house was pretty extravagant. The only real cost comes from the use of timber, slate, glass, labour, equipment hire, sand, and the fact that he used shillet in his cob mix. Since the cost of these materials depends mainly on local availability of the material the price is really irrelevant anyway. On the topic of shillet, the article says that Kevin McCabe was the first person to use shillet in cob, which is plain untrue, as I have seen Cornish cob cottages with shillet cob, which was exposed when they were demolished. generally I'd say that the section on McCabe's house is pretty unencyclopedic, and would say delete it until someone can be bothered to cite it - the section doesn't really add anything to the article and what little information it contains is debateable at best. ▫Bad▫harlick♠ 02:07, 28 January 2007 (UTC)

text: Just noticed the cite for this claim, however I'm still uncomfortable with it as I don't feel that it's representative of the subject, nor is it possible for me to verify without a copy of that newspaper. So my recommendation remains "delete". ▫Bad▫harlick♠ 02:06, 31 January 2007 (UTC)

text: Someone was adding links to sites that were commercial interests, blogs, and/or forums, and an edit war ensued between two contributors, because these types of links aren't allowed unless the circumstances are exceptional (IE the whitehouse website on the whitehouse article, or the coca cola company website on the coca cola article) or if there is a general lack of suitable external websites on the internet. In this case there are lots of good websites on the subject and the circumstances are hardly exceptional. ▫Bad▫harlick♠ 02:00, 31 January 2007 (UTC)
replies: text: So if I'm understandign this correctly the website promotes a discussion forum, business, or a blog then they are not allowed? What kind of links are acceptable then? I would have thought things like cobprojects.info or cobworkshops.org would be alright? Thanks Again - 1/31/07(Ddraig) —The preceding unsigned comment was added by 12.47.114.250 (talk) 20:46, 31 January 2007 (UTC)
replies: text: Well, a link is there to expand on the information provided in the article. The idea is to allow the reader to learn more without having to clog up the article with large blocks of text. Therefore, ideally only one or two external links may be necessary, in this case various aspects of cob buildings, both modern and throughout history, as well as techniques and so forth. While I'm sure both the websites you cited there are very informative, does one offer information that the other does not? And is a website requiring the purchase of a product before you can learn more really necessary when we can link to a website that offers the same information for free? These are things that we must consider before adding a link to an external website. ▫Bad▫harlick♠ 03:28, 17 May 2007 (UTC)
thread_title: Cost of wall

message: Hello, Was wondering why the external links list keeps disappearing and why some links are being removed. Thanks. - 1/30/07 (Ddraig)
:Someone was adding links to sites that were commercial interests, blogs, and/or forums, and an edit war ensued between two contributors, because these types of links aren't allowed unless the circumstances are exceptional (IE the whitehouse website on the whitehouse article, or the coca cola company website on the coca cola article) or if there is a general lack of suitable external websites on the internet. In this case there are lots of good websites on the subject and the circumstances are hardly exceptional. ▫Bad▫harlick♠ 02:00, 31 January 2007 (UTC)
replies: text: So if I'm understandign this correctly the website promotes a discussion forum, business, or a blog then they are not allowed? What kind of links are acceptable then? I would have thought things like cobprojects.info or cobworkshops.org would be alright? Thanks Again - 1/31/07(Ddraig) —The preceding unsigned comment was added by 12.47.114.250 (talk) 20:46, 31 January 2007 (UTC)
replies: text: Well, a link is there to expand on the information provided in the article. The idea is to allow the reader to learn more without having to clog up the article with large blocks of text. Therefore, ideally only one or two external links may be necessary, in this case various aspects of cob buildings, both modern and throughout history, as well as techniques and so forth. While I'm sure both the websites you cited there are very informative, does one offer information that the other does not? And is a website requiring the purchase of a product before you can learn more really necessary when we can link to a website that offers the same information for free? These are things that we must consider before adding a link to an external website. ▫Bad▫harlick♠ 03:28, 17 May 2007 (UTC)
thread_title: External links

message: Just put in a request for a citation with regards to cob's claimed benefits.  That it's cheap or not has already been discussed here.  But has anybody actually done a study stating that cob buildings are resistant to earthquakes?  (And no, anecdotes don't cut it--I mean a real study.)  It also seems odd to state that cob buildings are "fireproof," and then further down the page (under "Modern Cob Buildings") we have a mention of an Irish cob building that got destroyed by arson. I'd love to see some better references on this page.
Aasmith (talk) 01:55, 18 February 2008 (UTC)
thread_title: Citations?

message: To suggest that cob construction is resistant to earthquakes might be misleading. We recently (2010/02/27) had a significant earthquake in Chile, and all the adobe construction in an area over hundreds of kilometers long was destroyed. Adobe might not be cob, but if human life is valuable, be careful of what materials you use in earthquake prone areas.
Perbjarnebro (talk) 14:25, 11 April 2010 (UTC)
thread_title:  Seismic resistance of cob construction 

message: I don't really get how this is different from Adobe.
— Chameleon 23:32, 27 March 2008 (UTC)
replies: text: To my understanding, it's on two levels: one, the mix is different in creation technique and the content. Two, adobe will degrade in the rain, and is thus only really suitable for dry climates. Cob will not break down in wet weather. VanTucky 23:44, 27 March 2008 (UTC)

text: Adobe sometimes has straw added, while cob always adds a decent amount of straw. Adobe is preformed into units and dried, before assembling into a structure, while cob is built up on the structure like sculpting. Bodhi.peace (talk) 18:19, 6 April 2008 (UTC)

text: Cob uses larger proportion of straw than adobe, it also uses longer individual straws. During the process of building a cob wall, straws are laced together by pushing a Cobbers Thumb (a stick) into the wet top layer. The longer strands of straw also creates very small airways which speed in drying, an important factor in the speed of construction. Also, cob is a reference to the building technique of tossing a small lump(cob) from person to person in a line of any length straight up to people on the wall (thus no heavy lifting or hauling equipment).  —Preceding unsigned comment added by 64.112.227.142 (talk) 22:49, 1 May 2008 (UTC)
thread_title:  Adobe 

message: The article does not say that cob originates in the Maghreb. It started being used their. Limestone had been the dominate material since ancient times. Cob and adobe had been the dominant material in the Sahel. I suspect this material originates in the Sahel or west africa. 72.86.24.230 (talk) 23:32, 30 July 2010 (UTC)
replies: text: An interesting theory – do you have any refs for it?  Richard New Forest (talk) 20:29, 31 July 2010 (UTC)

text: In particular, is there any evidence that it originated in just one place? Tamped earth mixes would seem to have had multiple origins in the independent fertility of congruent great minds. JonRichfield (talk) 14:01, 12 September 2012 (UTC)
thread_title:  Originates in the Sahel 

message: The intro alleges that cob is a fireproof material. However, the section on modern cob domiciles explicitly says that one was destroyed by an arsonist. These two facts are at the very least mildly confusing. Someone familiar with the particulars should rectify the discrepancy.  —Preceding unsigned comment added by 68.105.150.56 (talk) 02:35, 15 May 2011 (UTC)
thread_title:  Fire Proofing 

message: Your description of "cob" does not gel with the article on Woodway House (note "lime" in particular). Could someone please reconcile the two? I am leaving a similar note with the Woodway House article. In particular I am interested in the distinction between the usages for the terms. I would see to it myself, but this is not my line.  JonRichfield (talk) 14:12, 12 September 2012 (UTC)
thread_title: Someone please check usage in another article?

message: This article is lacking in a few areas and the EBUKI Clayfest Conference of 2016 has further emphasised the rarely mentioned existence of clay dabbin/daubing in the Solway Plain area. It would help correct the impression given by the article if details were added of the Solway Plain earth built structures and the method used - it clearly differed from the standard cob construction.Rosser Gruffydd 17:04, 26 July 2016 (UTC)
replies: text: In which case maybe it isn't cob? In either case, a suitable source is required (and Dorothy Wordsworth's account, historically interesting as it undoubtedly is, isn't suitable for statements about cob buildings today). PaleCloudedWhite (talk) 17:11, 26 July 2016 (UTC)
replies: text: That seems a narrow view - Cob material is known by many names including adobe,[6] lump clay,[6] puddled clay, chalk mud,[6] wichert,[6] CLAY DAUBINS,[6] swish (African), torchis (French),[7] bauge (French),[7] bousille (French mud with moss),[7] cat and clay[8]. Rosser Gruffydd 17:14, 26 July 2016 (UTC)
replies: text: It's possible this article needs renaming or redefining, as there are many names and local variations of what is basically a reinforced clay structure, but in any case my point is that we need sources to verify statements. If the structures that you refer to are fundamentally similar (or fundamentally different) to cob, we need sources stating that. My objection to your addition is solely that the source you used (Dorothy Wordsworth) just can't be considered adequate. PaleCloudedWhite (talk) 17:25, 26 July 2016 (UTC)
replies: text: For your consideration and comment - Scottish National Dictionary -
†DAUBING, vbl.n. A gathering of neighbours to build the walls of a new house.
Dmf. 1795  Stat. Acc.1 II. 22–23: 
The manner of erecting them [houses] is singular. In the first place, they dig out the foundation of the house, and lay a row or two of stones, then they procure from a pit contiguous, as much clay or brick-earth as is sufficient to form the walls: and having provided a quantity of straw, or other litter to mix with the clay, upon a day appointed, the whole neighbourhood, male and female, assemble, each with a dung-fork, a spade, or some such instrument. . . . In this manner, the walls of the house are finished in a few hours: after which they retire to a good dinner . . . where they have music and a dance. . . . This is called a daubing.
[From Eng. daub, to smear.] Rosser Gruffydd 17:30, 26 July 2016 (UTC)

text: That seems only to support an assertion that, in Scotland at least, people coming together to erect such walls is called a daubing, though it doesn't support any statement that the actual material is called daubing. Also the process described here is fundamentally different from cob in that the walls do not appear to be built in layers with drying time between each layer. So, I'm not sure how this would fit into the article, if at all. PaleCloudedWhite (talk) 21:33, 26 July 2016 (UTC)
replies: text: I may produce an article on Clay Dabbin / Daubing however I suspect that the consensus would call for it to be combined with this article. Rosser Gruffydd 07:34, 27 July 2016 (UTC)
replies: text: I have added a few  where most required. I note that your 19th Century definition of 'Cob' requires revision - "Cob is the use of the earthen material as a structural component". This would include the use the use of clay as a filling material in timber-frame structures... Clay dabbin would therefore be a variety of 'Cob'. Maria Yioutani-Iacovides in 'Vernacular earthen architecture'. 'Context' No.143 March 2016. Page 11. Institute of Historic Building Conservation. Rosser Gruffydd 07:55, 27 July 2016 (UTC)
replies: text: Please note that it is not my "19th Century definition of 'Cob'", because—as is standard on Wikipedia—this article has been written by many editors. I have not been defending the rest of the article, but just objecting to Dorothy Wordsworth being used as a source for a new addition about cob buildings in existence today. PaleCloudedWhite (talk) 08:13, 27 July 2016 (UTC)
thread_title: Clay dabbin and Daubing

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thread_title:  External links modified (January 2018)