Application of smooth plasters
Smooth plasters can be applied both on basecoats and on external thermal insulation composite systems and also on insulating plasters. The norm DIN 18550 Part 2 generally states: "In the case of finely rilled, smooth or floated plasters, there is a risk of binder accumulation on the plaster surface during texturing, which promotes the formation of shrinkage cracks and, in the case of slaked lime mortars, inhibits the hardening of deeper layers". As a rule, coarser plaster structures should be used in exterior areas, as hairline cracking can never be ruled out with smooth ones.
Simple & safe to the goal
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On underlay render (base coat)
1. Apply a lightweight render, e.g. the lightweight lime-cement underlay render weber.dur 132. Leave its surface as required for the specific overlay render (top coat). Waiting time > 14 days. For better stability, we recommend applying a full-surface reinforcement layer.
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On ETICS
4. A full-surface reinforcement layer of bonding and reinforcing mortar + reinforcement fabric is applied onto the lightweight underlay render (base coat) and the insulating render. After a standing time of at least 7 days the ETICS receives a second reinforcement layer, which again consists of the same bonding and reinforcing mortar + reinforcement fabric.
Necessary products for this solution
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