Browse Forums Renovation + Home Improvement Re: Low-E, Double Glazing, uPVC, Aluminium, U-values, SHGC 15Sep 05, 2018 12:50 am It is not only spacer, but overall profile itself. For example, this is how one of the best thermally performing profiles in the world look like - you can see that is not only warm edge spacers, but also the number, location, shape and material of the seals, the quantity and shape of the chambers and many others smaller tricks make it perform the way it performs both thermally and acoustically (roughly comparable to moderately insulated brick veneer wall). And of course, it should be coming with respective glazing (e.g. the glazing itself on this profile performs to U value of 0.5). Profile itself is responsible only for around 33% of the U value performance in Australia, the rest is glazing. For your reference Performance Labels: Window assemblies in housing, except timber windows, must be labelled so the label can be seen when it is in situ. For timber… 6 7627 This is one of the reasons I decided to go overseas for my double glazed windows. As the builder indicated, he's worked on many upmarket builds, these were the most well… 13 19016 I don't know them all, the first 2 top of your list are best known. Rylock is a good company, Stegbar is for sale. 4 16148 |