Why a Breathable all in one membrane makes sense

Why a Breathable all in one membrane makes sense

As the world battles with the crisis that is global warming, one way those of us in construction can help is by building more efficient low energy buildings. The cornerstone of a low energy build is making sure you get the airtightness right! The more airtight the building the less energy that building is likely to consume. However, one unintended consequence of making our buildings more and more airtight is...

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Cavity Wall - has it a future in low energy construction?

The cavity wall is an integral part of the UK & Irish construction industry - it accounted for approximately 70% of new housing. To meet new U -Values for building regulations, achieve passive levels of airtightness and to minimise thermal bridging should we abandon the cavity wall in favour of timber frame or externally insulated masonry? There are issues to overcome but what does cavity wall still offer that External...

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U/R-Values – The Difference Between Calculated and Insitu Measurements

U/R Values overview U/R-values are used to describe the thermal performance of building elements including floors, walls, windows, doors and roofs. This data is then used to calculate the energy performance of the whole building which in turn can impact on the size and cost of the specified insulation, heating system and overall cost of the development. U/R-values are calculated using a range of computerised calculators and in some cases...

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Airtight Membranes & SD values

Airtight Membranes & SD values Often referred to as airtight membranes know but should be classified as - Vapour Checks Vapour Barriers Before we discuss the differences in 1 & 2 we need to discuss Vapour resistance, SD values and μ values. Vapour resistance The vapour resistance of a material is a measure of the material’s reluctance to let water vapour pass through. The μ (“mu-value”) of a material is...

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