Wed, 10 Jun 2026 02:32:10 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124770#Comment_124770 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124770#Comment_124770 Thu, 01 Dec 2011 21:01:55 +0000 suegreenbuilding http://www.foamsheathing.org/images/TM_Cladding_Air_Space_R_value.pdf) Thermal resistance of air spaces behind wall coverings.

However using this has dramatically changed by U value calcs for an uninsulated block/brick wall (down to .78 from 1.81). Can anyone help please?

Thanks.

Sue]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124778#Comment_124778 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124778#Comment_124778 Thu, 01 Dec 2011 21:57:20 +0000 tony
What are you trying to do?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124792#Comment_124792 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124792#Comment_124792 Fri, 02 Dec 2011 07:55:08 +0000 Saint Follow this link:
http://www.bre.co.uk/filelibrary/pdf/rpts/BR_443_(2006_Edition).pdf
All will be revealed]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124794#Comment_124794 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124794#Comment_124794 Fri, 02 Dec 2011 08:17:06 +0000 CWatters
http://www.cba-blocks.org.uk/tech/tech_uvalue.html

Note it asks for the thermal conductivity of the materials which is not the same as the U-Value.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124844#Comment_124844 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124844#Comment_124844 Fri, 02 Dec 2011 11:00:15 +0000 jms452
http://www.vesma.com/tutorial/uvalue01/uvalue01.htm

They both give 0.18m2k/w though for the cavity - This will assume that the cavity isn't significantly ventillated...

If the cavity has low emmisivity coatings its R value will also increase but this will get complicated and won't apply to just blocks]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124996#Comment_124996 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=124996#Comment_124996 Sat, 03 Dec 2011 20:53:08 +0000 borpin Posted By: jms452I prefer this one which allows you to build up an arbitrary wall:http://www.vesma.com/tutorial/uvalue01/uvalue01.htm" >http://www.vesma.com/tutorial/uvalue01/uvalue01.htm Like that one. Thanks]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=125227#Comment_125227 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=8209&Focus=125227#Comment_125227 Mon, 05 Dec 2011 17:56:50 +0000 suegreenbuilding