Is it possible to use TLX as a single layer to achieve a U-value of 0.2?
No. TLX is fully certified with a hot box tested R-value that needs extra insulation to achieve a U-value of 0.2. Web Dynamics advocates the use of multi-foils with a further layer of insulation. In 2008 the LABC issued a new guidance note over the use of multi-foils and strongly recommending the use of British Board of Agrment certified (BBA) multi-foils and that they should be used as part of an insulation system, and not as a single layer, in order to meet the normal roof U-value requirement of 0.2.
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- Is it possible to use TLX as a single layer to achieve a U-value of 0.2?
