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Application
Characteristics
Technical-data
delivery-units
material-consumption
Processing

XERAL UNI A

Universal exterior lime plaster

XERAL UNI A universal exterior lime plaster is a factory produced mineral general plastering mortar of the GP class and compressive strength class CS I to DIN EN 998-1

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Technical product data sheet
Application
Characteristics
Technical-data
delivery-units
material-consumption
Processing

Application:

  • As reinforced basecoat plaster on insulating plaster and on mineral insulating boards
  • As fine plaster layer, felt-finish plaster or freely textured final coat on lime reinforcing plaster, lime and lime cement plasters as well as in the new-build and renovation sectors and organic home construction
  • Application for walls and ceiling

Characteristics:

  • Can be manually or mechanically worked
  • Antifungal due to high pH value
  • Mineral
  • Fibre reinforced
  • Hydrophobic
  • Low tension
  • Water-vapour permeable
  • Fire behaviour A1
  • XERAL UNI A universal exterior lime plaster contains lime, hydraulic ingredients, selected aggregates and characteristics enhancing additives

Technical-data:

Class CS I to EN 998-1
Grain size 0 – 0.8 mm
Fire protection class A1
Thermal conductivity λ 10,dry, mat (tabular value to EN 1745) ≤ 0.45 W/(m * K) for P=50%
≤ 0.49 W/(m * K) for P=90%
Water absorption WC2 to DIN EN 998-1
Water vapour permeability (μ) ≤ 20
pH value 11 – 13
Adhesive tensile strength ≥ 0.08 N/mm² (with fracture pattern A, B or C)

All technical data are characteristic values which have been determined under laboratory conditions on the basis of the applicable test standards. Deviations under practical conditions possible.

delivery-units:

  • 25 kg/bag
  • 42 bags/pallet

material-consumption:

  • Bag contents: 25 kg
  • Water requirement: approx. 7 l/bag
  • Yield: approx. 810 l/ton
  • Consumption:
    Felt-finished (3 mm layer thickness*) approx. 4 kg/m2
    Reinforcement (6 mm layer thickness*) approx.  7 – 7.5 kg/m2

*Dependent on condition of base surface

 

Processing:

BASE SURFACES:

  • The base surface must be solid, clean, sound, frost-free and dry
  • Remove surface layers which are less firm, dust, loose particles, release agent residues, paint residues and suchlike
  • Check existing plaster on the base surface for soundness and bonding and thoroughly clean before working over.
  • Chip off plaster cavities and fill out
  • Consolidate chalky/sandy areas
  • Where appropriate lightly pre-wet severely absorptive base surfaces
  • Always carry out base surface inspection/preparation pursuant to (German Construction Contract Procedures) VOB/C-ATV_DIN 18350 and DIN 18550 / DIN EN 998-1 as well as DIN EN 13914 -1 and -2

BASIC DIRECTIONS:

  • Do not add anything other than pure water
  • Only use stainless tools when working
  • Wash tools in water immediately after use
  • Not suitable for use in the basement area

MANUAL WORKING:

  • Mix one container of XERAL UNI A universal exterior lime plaster with approx. 7 l of clean water and  stir well to a good working consistency using an electric agitator; after a short maturing time stir again and if necessary adjust by adding more water.

MECHANICAL WORKING:

  • Adjust to suitable working consistency – Recommended machinery equipment: General plastering helix mixer; stator: D6-3 auger: D6-3 spray head: 12 mm, mortar hose: Ø 25 mm

REINFORCEMENT:

  • As reinforced basecoat plaster on XERAL insulating plaster or insulating boards: Apply XERAL UNI A universal exterior lime plaster with a 10 or 12 tooth trowel. Apply XERAL COM 4x4 reinforcement fabric and when doing so overlap the sheets by approx. 10 cm. Lightly draw mortar over with trowel. Subsequently cover with a further thin layer of XERAL UNI A universal exterior lime plaster.  It is important that the reinforcement fabric is well covered and no longer visible. The overall plaster thickness consisting of reinforced basecoat plaster and felt finish/final coat should be at least 6 mm.

AS A FELT FINISH:

  • Apply an initial coat of XERAL UNI A universal exterior lime plaster in grain thickness onto the smooth flat surface and after setting apply a second coat with a mean thickness of approx. 2 – 3 mm, draw flat and after setting finish with a felt disc. Where required the smooth flat surface can be pretreated with XERAL PRE 02 Siliceous Plaster Base.

TEMPERATURE AND WEATHER CONDITIONS:

  • The freshly applied plaster is to be protected by suitable means from dewatering too quickly in the sun, in the wind and at high temperatures as well as from exposure to driving rain and the action of frost.
  • High humidity and low temperatures can significantly prolong the curing period.
  • Do not work with component and air temperatures below +5°C or above + 30°C.

Please observe the relevant standards such as DIN 18350, DIN 18550, DIN EN 13914 and publications such as »Leitlinien zum Verputzen von Mauerwerk und Beton« (Industrieverband WerkMörtel e.V.) »Putz auf Ziegelmauerwerk - Außen-und Innenputz; Fachgerechte Planung und Ausführung« (Bundesverband der Deutschen Ziegelindustrie e.V.) and »Verputzen, Wärmedämmen, Spachteln, Beschichten bei hohen und niedrigen« (Bundesverband Ausbau und Fassade).