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Showing results for tags 'u-value'.
Found 9 results
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I know the lower U-value I achieve for my ground floor the better but is there a maximum U-value beyond which under floor heating is not advisable?
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I have my SAP calculation for my forthcoming bungalow and all generally looks good. The roof and floor have U-values of 0.08 W/m².k. However, the walls are a bit low, about 0.18 W/m².k. I did this on-purpose to maximise floor-space but it has turned-out a bit lower than I expected so I am thinking o...
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u-values How to Calculate U-Values for Ground and First floors?
Chendy posted a topic in Heat Insulation
Hello, I am completely new to the building control process, stumbling my way through, any help very appreciated... I have a maisonette flat situated on the ground and first floors of a 4 storey residential block. The block is a reinforced concrete frame construction. Al... -
Hello, I'm going building a house in the South West of Ireland with the fabric first approach. I have purchased PHPP and trying to DIY it. Is it Ok to have more Insulation in Floor and Roof than the walls? Floor = 0.108 Walls = 0.15 Roof = 0.117 Or should the U-value's be more even...
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Hi I think I understand how U-Values are calculated e.g. (Layer thickness) X Lambda = R in m2 K/W Add up all the R-values for each of the layers and 1/(Total R-Value) = U-Value in W/m2 K However if you look at the calculations from my "As-designed" SAP 2009 report...
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Does anyone have a link to an idiot proof guide to help me understand my U-Value calculations, and what ‘Ok’ might look like please. I don’t have a passive house, so it won’t be super efficient, and some of the assumptions in mine aren’t quite right I believe as surely if I have MHRV it shouldn’t sa...
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Just about to order some more PIR having sorted out my plan of attack. Half of this pitched roof is going to be 'vaulted' (i.e. Just one pitch of the roof with internal wall coming up right up to the ridge). So planning to fill between the 75mm (yes 75mm!) rafters with 25mm PIR and then... -
Depending on the number crunching, I seem to be settling on a 155mm full fill cavity with eps beads for a number of reasons, fast install, builder free installation etc to name a few. With Thermabead's Carbon Saver for example brick outer, 155mm full fill, med dense block inner and plast...
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Right, evening all. I have sufficient depth in my ground bearing slab build up for 260mm of insulation and need to achieve at least a u-value of 0.11w/m2k. To achieve this I was going to use a mix of PIR and EPS. If I were to use the below, what overall u-value do I end up wi...
