Green Building Bible, Fourth Edition |
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These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment. PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book. |
Vanilla 1.0.3 is a product of Lussumo. More Information: Documentation, Community Support.
Posted By: fostertomBRE did not monitor or control this installation.Would the man on the Clapham Omnibus know what to look for in terms of correct installation? Snake oil!!
Posted By: fostertomHow about following the instructions supplied?
Posted By: fostertomHow about following the instructions supplied?
Posted By: Beau25mm gap each side of the foilAre you sure, why a gap?? I thought gaps in insulation were a no, no.
Posted By: gyrogear"25mm gap each side of the foil"
I suspect it said, "air space"
gg
Posted By: fostertomMultifoils work by being v reluctant to radiate heat across an air gap, because of its multiple shiny surfaces having v low emissivity.
That's the several shiny surfaces that face another ditto within the multiple layers of the quilt,
and the 2 outermost shiny surfaces that face an ordinary building-material surface.
Radiation happens across an air gap, not between surfaces that are in contact.
So if the outermost shiny surface touches the ordinary building-material surface, then there's no radiation there for the multifoil to resist, so a significant %age of the multifoil's functional shiny surfaces are disabled.
That's why there must be at least a tiny air gap between the multifoil's 2 outer faces, as installed, and the soild it faces.
Posted By: fostertom.............
Come to think, why don't the MF manufs put a layer of the wadding on the outside, so even if that's touching something solid, as far as the outer shiny surface is concerned it's still seeing air space?
Posted By: fostertomCome to think, why don't the MF manufs put a layer of the wadding on the outside, so even if that's touching something solid, as far as the outer shiny surface is concerned it's still seeing air space?
Posted By: wookeyYou would like to think that the BRE would install things according to the destructions when doing tests for certification purposes. Anyone read the reports for the details?
Posted By: DarylPOn a more serious note, I am not sure how PHPP verifies U-values, are they to BS EN ISO 8990?