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NOTEIt is not the intention of this test to assess insufficiencies at the interface of the seal with services.

2.4.9.2Method of assessing and  judging

The measured airborne sound insulation is expressed as a single number rating Rw, Dn,w in accordance with EN ISO 717-1.

2.4.10 Thermal resistance

2.4.10.1 Method of verification

See Part 1 – "General"

2.4.10.2 Method of assessing and judging

See Part 1 – "General"

2.4.11 Water vapour permeability

2.4.11.1 Method of verification

See Part 1 – "General"

NOTEWater vapour permeability is considered as a material property. Thus tests are carried out without services passing through the specimen. It is not the intention of this test to show water vapour leakage at the interface of the seal with services.

2.4.11.2 Method of assessing and judging

See Part 1 – "General"

2.4.12 Durability and Serviceability

2.4.12.1 Method of verification

2.4.12.1.1 General

There are two groups of materials used for penetration seal products:

Materials covered by a standard: see 2.4.12.1.2 and 2.4.12.1.4.

Materials not covered by a standard: see 2.4.12.1.3 and 2.4.12.1.4.

The assessment of any single product may require to consider materials of both types.

Where the product is intended to be used in environmental conditions not covered by X, Y1, Y2, Z1 and Z2, e.g. acid, alkaline or saline conditions, further confirmatory evidence or tests will be necessary as determined by the approval body.

2.4.12.1.2 Durability of materials covered by a standard (e.g. metal or plastic components)
2.4.12.1.2.1 Painted/coated steel

The adequacy of a coating on steel shall be assessed in accordance with EN ISO 12944 in its various parts.

2.4.12.1.2.2 Galvanised steel

The adequacy of zinc corrosion protection shall be assessed in accordance with EN ISO 14713, which gives general recommendations on corrosion protection.

2.4.12.1.2.3 Coil-coated steel

Coil-coated steel shall be assessed in accordance with EN 10169.

2.4.12.1.2.4 Coil-coated aluminium

Coil-coated aluminium shall be assessed in accordance with EN 1396.

2.4.12.1.2.5 Stainless steel

Stainless steels shall be classified by reference to EN 10088. Annex B of EN 10088 contains general guidance on the use of stainless steels including the aspect of corrosion resistance.

Ferritic stainless steels have relatively low corrosion resistance and their use should normally be restricted to mild indoor or similarly protected environments. This type of stainless steel is suitable for use in use categories Z1, Z2 and Y.

Note: Austenitic stainless steel: The most common alloys are 1.4301 (X5CrNi18-10) and 1.4401 (X5CrNiMo17-12-2). These austenitic stainless steels are normally suitable for use in all use categories as defined in 1.2. However, where high chloride contents or more severe conditions are likely to be present in the environment (e.g. rooms with indoor swimming pools, facades in cities with heavy traffic, in coastal areas), alloys with higher molybdenum content, e.g. 1.4429 (X2CrNiMoN17-13-3), 1.4539 (X1NiCrMoCu25-20-5) or 1.4529 (X1NiCrMoCuN25-20-7), may be necessary.

ETAG 026

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