Comments on: Airtight Membranes & SD values http://www.partel.ie/blog/?p=58 Passive building supplies Thu, 01 Sep 2016 16:34:15 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: U-Values – The Difference Between Calculated and Insitu Measurements | Partel Blog http://www.partel.ie/blog/?p=58#comment-284 U-Values – The Difference Between Calculated and Insitu Measurements | Partel Blog Thu, 19 Sep 2013 14:35:59 +0000 http://partel.ie/blog/?p=58#comment-284 [...] The correct installation of the appropriate VCL will ensure that a breathable construction is achieved which means that condensation of roof felt is avoided and that the roof can effectively ‘breath’ correctly. The quality of the installation is of utmost importance as weak points may be formed, which in certain weather conditions may generate condensation in the roof space. As a result, this may lead to mould and/or timber damage. Ampack’s extensive range of VCL solutions from DB 90 (fixed SD of 23), Resano (variable SD 0.9 to 12m), to Cento (fixed SD 100m), to name a few, ensures that the correct product for each construction type is available. Read more on SD values here. [...]

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