The ability of a fresh [hydraulic] mortar to retain its mixing water when exposed to substrate suction. (EN 1015-8).
Water vapour permeance
Water vapour passing per unit area of mortar, under steady state conditions, per unit difference in water vapour pressure. (EN 1015-19). 0501901
Waterproofing mortar
A designed mortar which prevents water penetration in a substrate, under a stated pressure.
Weatherproofing mortar
A mortar which resists rain penetration and protects the substrate from weather. (e.g. external rendering and one-coat mortars are weatherproof). 0203501
Wetting capability
The ability of a fresh mortar to wet the substrate or an associated material to facilitate its adhesion. (EN 1347).
Workability
The sum of the application properties of a mortar which give its suitability (the ease with which a mortar may be used). (EN 1015-9). 0401901
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