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  • BSI
    BS EN 12086:2013 Thermal insulating products for building applications. Determination of water vapour transmission properties
    Edition: 2013
    $316.70
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Description of BS EN 12086:2013 2013

This European Standard specifies the equipment and procedures for determining the water vapour transmission rate, water vapour permeance and water vapour permeability of test specimens in the steady state under different sets of specified test conditions. It is applicable to thermal insulating products.

It is intended to be used for homogeneous materials and for products which may contain integral skins or facings of different material(s).

A material is considered to be homogeneous, with regard to mass distribution, if its density is approximately the same throughout, i.e. if the measured density values are close to its mean density.

This test method is not normally used for determining the water vapour transmission properties of single, separate vapour barriers (of high diffusion resistance), such as prefabricated films, foils, membranes or sheets, due to the long duration of the test. For products with a vapour retarder or barrier with a water vapour diffusion equivalent air layer thickness sd ≥ 1 000 m (see 3.6) other test methods e.g. IR-detection can be used for measuring the single separate vapour retarder or barrier, provided that the results obtained are in the same range as the values measured in accordance with this standard.

The water vapour transmission rate and permeance values are specific to the test specimen (i.e. the product) thickness tested. For homogeneous products, the water vapour permeability is a property of the material.



Standard NumberBS EN 12086:2013
TitleThermal insulating products for building applications. Determination of water vapour transmission properties
StatusUnder Review
Publication Date2013-03-31
ReplacesBS EN 12086:1997
Identical National Standard OfEN 12086:2013
DescriptorsConstruction materials, Humidity, Moisture, Water-vapour tests, Shape, Permeability, Error correction, Thermal insulation, Thermal insulating materials, Accuracy, Testing conditions, Mathematical calculations, Test specimens, Water vapour, Dimensions
ICS91.100.60 Thermal and sound insulating materials
CommitteeB/540
ISBN978 0 580 78045 5
PublisherBSI
Pages22

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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