Tue, 21 May 2013 18:26:32 +0100 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68540#Comment_68540 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68540#Comment_68540 Thu, 10 Dec 2009 09:34:48 +0000 stones
I have no issue with the pavatherm way of construction when the building is clad in timber, as the pavatherm would be strapped before the cladding was fixed, thus giving a cavity. Equally I appreciate that before modern concrete, lime was extensively used in this country. It is really a question of whether it will work in the long term when applied directly to pavatherm.

Anyone have any experience of this?

Thanks]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68564#Comment_68564 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68564#Comment_68564 Thu, 10 Dec 2009 12:53:09 +0000 biffvernon http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68568#Comment_68568 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68568#Comment_68568 Thu, 10 Dec 2009 13:09:02 +0000 Nick Parsons
Biff, I like the subterfuge! Is there a form of words one can use to baffle the lime, or should it be applied blindfolded? :)]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68643#Comment_68643 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68643#Comment_68643 Thu, 10 Dec 2009 21:50:47 +0000 djh
Is pavatherm plus designed for render? I thought diffutherm was the appropriate flavour in the range? The manufacturers and/or distributors will be able to tell you definitively and provide the relevant BBA cert.

Others here are more expert, but you asked about maintenance and haven't yet had an answer, so as far as I know ... Lime render needs surface maintainance. Traditionally that was several coats of limewash, refreshed with a new coat every few years. Nowadays you can also use breathable silicate treatments such as produced by Beeck or Keim, which last much longer between repainting. I also understand that a rough surface render, such as traditional harling, is better in a wet environment than is smooth render.

Cheers, Dave]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68646#Comment_68646 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68646#Comment_68646 Thu, 10 Dec 2009 22:09:14 +0000 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68655#Comment_68655 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68655#Comment_68655 Thu, 10 Dec 2009 22:54:51 +0000 Nick Parsons http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68740#Comment_68740 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68740#Comment_68740 Fri, 11 Dec 2009 16:34:45 +0000 djh
I guess that since nobody has butted in with any experience of this material, I can only suggest asking the manufacturer/agents for references. There should be enough examples in Switzerland to show how well it lasts - that specific product appears to have been around for 17 years and the company itself for 77 years.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68751#Comment_68751 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68751#Comment_68751 Fri, 11 Dec 2009 17:23:58 +0000 biffvernon I'me not quite sure just how much roughness there is to the Pavatherm surface. You need a bit of texture to get the lime to bond properly. Somebody must have done it by now.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68755#Comment_68755 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68755#Comment_68755 Fri, 11 Dec 2009 17:37:04 +0000 djh
But actually, looking at the descriptions ...

http://www.natural-building.co.uk/pavatex_diffutherm_timber_frame.htm
http://www.natural-building.co.uk/pavatex_diffutherm_masonry_external_wall_insulation.htm

... they specify a proprietary thin render, so you're right to be cautious. I'd definitely check about the suitability of using lime.

Cheers, Dave]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68794#Comment_68794 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4993&Focus=68794#Comment_68794 Fri, 11 Dec 2009 23:24:52 +0000 djh
http://www.n-kesteven.gov.uk/imageLibrary.asp?page=4

(if that link doesn't work try http://www.n-kesteven.gov.uk/imageLibrary.asp?catId=1524 and then go to page 4)

... but I can't vouch for whether diffutherm and/or mesh or anything else was actually used. And obviously it's too new to say much about its longevity. Amazonails will know more.]]>