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Posted By: bobirvingNot sure this constitutes a system... we are using phenolic foam with netting and Thermopor over it.
Posted By: Nick ParsonsI got the impression the OP was talking more about pull-out of mech fixings than adhesion, no?
Posted By: Mike GeorgeIf you read their literature it says 'use mechanical fixings where specified' Doesn't say specified by whom!
Posted By: Mike GeorgeSome seem to believe that the heat loss through bridges is disproportionate to the surface area but I cannot see how this is the case.
Posted By: SteamyTeaPosted By: Mike GeorgeSome seem to believe that the heat loss through bridges is disproportionate to the surface area but I cannot see how this is the case.I can't see that either. I think it comes from doing dodgy arithmetic
Posted By: Ed DaviesThe temperature profile in both the insulation and the fixing will be the same (i.e., linear from the internal to the external temperature
Posted By: Nick ParsonsThere has been discussion on here re this before, but I cannot remember where.
Posted By: fostertomImagine a metal screw fixing through EWI. Tell me if I'm wrong, but the inboard one-third of the conductive screw will be kept pretty much warm by its contact with the warm interior; likewise the outboard one-third will be kept pretty cold by its contact with the cold exterior. Most of the temp gradient along the length of the screw will be concentrated in the middle third. That means there will be temp gradients laterally between the screw and the EWI, therefore the heat flow will spread laterally, therefore the effective heat-flow area surrounding the screw will be much larger than the screw's cross section.Same with a gappy air filled joint, or filled with conductive adhesive, between EWI boards. Disproportional effect on overall insulative performance.
Posted By: MikeRumneyThere has been discussion on here re this before, but I cannot remember where.This one?http://www.greenbuildingforum.co.uk/forum114/comments.php?DiscussionID=7573&page=1
There has been discussion on here re this before, but I cannot remember where.
Posted By: an02ewi dont think i would just trust to an adhesive. but would also use some machanical fixings
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