Smooth, breathable plaster for new facades, in a thin layer? Rough plaster uses a lot of material, thick layers, yet is not smooth. Biocalce Intonaco Fino is a fine-grained (0–1.4 mm) pure NHL 3.5 lime base plaster: highly breathable (μ ≤ 6), machine-applied thinly and smoothly. This is Kerakoll Biocalce Intonaco Fino.
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Smooth base in a thin layer: finer grain than standard plaster — 0–1.4 mm, ideal 1–1.5 cm machine application on new walls
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Cement plaster traps moisture: here the wall breathes freely — pure NHL 3.5 lime, μ ≤ 6 water vapor diffusion, ≥ 40% porosity
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Durably protects and strengthens the masonry: pure natural lime and pozzolan — λ 0.45 W/(m·K), slightly better thermal insulation than standard plaster
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Old mixed masonry and new facade: one plaster for both — hollow and solid brick, tuff, stone, mixed masonry, for exterior and interior
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Moldy wall: naturally inhibits mold — B+ and F+ rating, resistant to fungi and bacteria (CSTB)
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Monument, adobe, old house: natural material matching the wall — lime, pozzolan, quartz sand, and dolomite limestone, without cement
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System base: the Biocalce restoration system body plaster — on Rinzaffo base plaster, finished with fine plaster and breathable paint
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Verified environmental data: EPD environmental product declaration — A1 fire resistance, GreenBuilding Rating 5
Properties
| Type |
general plaster mortar, GP (EN 998-1) |
| Function |
fine-grained breathable lime base plaster (body plaster) |
| Binder |
NHL 3.5 pure natural hydraulic lime |
| Grain size |
0 – 1.4 mm |
| Water vapor diffusion (μ) |
≤ 6 — highly breathable |
| Max. layer thickness |
≈ 1 cm / layer |
| Material requirement |
≈ 12 kg/m²/cm |
| Storage |
≈ 12 months, in a dry place |
| Packaging |
25 kg bag |
What is it suitable for?
Substrates: Hollow and solid brick, tuff, stone, and mixed (load-bearing and infill) masonry. New construction facades, restoration, and monument conservation. Absorbent and non-absorbent walls (for the latter, first Rinzaffo base plaster). Cellular prefabricated panel — with special preparation (Biocalce Fondo, reinforcing mesh).
Spaces: Exterior and interior — facade, interior walls, living spaces where a smooth, thin, breathable base layer is the goal (Edilizia del Benessere).
Function in the system: The Biocalce restoration system’s fine base plaster (2nd layer). Underneath Rinzaffo adhesion promoter, then Biocalce fine plaster (Intonachino Fino or Granello), then breathable paint; for the finest, polished finish, over the Fino Tipo “00”. Not direct base plaster on salty, nitrate walls: can be applied as breathable top layer on Zoccolatura salt blocker, helping wall drying.
Not suitable for:
- On dirty, loose, dusty substrate — clean first
- On old paint or existing leveling
- On surfaces covered with salt deposits — remove first
- As direct base plaster on salty, nitrate walls — first Zoccolatura salt blocker, then Intonaco Fino applied as breathable layer
The Biocalce restoration system
Biocalce Intonaco Fino is the system’s fine base plaster. The complete breathable build-up:
| Layer |
Product |
Role |
| 1. Primer plaster |
Rinzaffo |
adhesion promoter on compact/non-absorbent substrate |
| 2. Base plaster |
Biocalce Intonaco Fino — this product |
fine, smooth breathable plaster layer, thin layer |
| 3. Fine plaster |
Intonachino Fino / Granello
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smooth or grainy, paintable surface |
| 3b. Polished top layer |
Tipo “00” — over the Fino |
finest, polished surface |
| 4. Surface |
breathable paint or decorative plaster |
final, breathable, colored surface |
Surface (4th layer): breathable paint — Biocalce Tinteggio, Silicato Puro Pittura, indoors Absolute Paint also, on facades Kerakover Silox Pittura; decorative plaster — Silicato Puro, Marmorino, Spatolato.
Which base plaster is needed?
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Smooth base, thin layer, new facade: Biocalce Intonaco Fino (0–1.4 mm) — this product
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General base plaster, thicker build-up: Intonaco (0–2.5 mm)
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Salty, rising damp: Zoccolatura salt blocker
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Energy saving, warm wall: Benesserebio thermal insulation
Frequently asked questions
Which breathable base plaster is needed — Intonaco or Intonaco Fino?
The grain size and layer thickness matter. Intonaco Fino is finer (0–1.4 mm), provides a smooth base in thin layers (1–1.5 cm), ideal for new facades and machine application. Intonaco has coarser grains (0–2.5 mm), a general base plaster for thicker builds.
What is breathable plaster?
Breathable plaster allows water vapor to pass through, so the wall dries out and moisture does not get trapped. Pure lime-based plaster is porous (≥ 40%) and has low vapor diffusion resistance (μ ≤ 6). Made without cement.
Is it good for new building facades?
Yes, it is specifically recommended for this. Biocalce Intonaco Fino can be applied in thin 1–1.5 cm layers by machine — a smooth, breathable facade plaster base, also suitable indoors. Suitable for restoration and monument conservation.
What walls is fine lime plaster suitable for?
For hollow and solid bricks, tuff, stone, and mixed masonry, indoors and outdoors, on new and old walls. On solid or non-absorbent substrates, first apply Biocalce Rinzaffo base plaster. Special preparation is needed for cellular panels.
Is lime plaster good for moldy walls?
Yes, natural lime plaster inhibits mold on moldy walls — Biocalce Intonaco Fino is B+ and F+ rated (CSTB). Its high breathability keeps the wall dry, so mold finds no damp surface.
What is needed over Biocalce Intonaco Fino?
Fine plaster and breathable paint. For smooth surfaces use Intonachino Fino, for coarser surfaces Granello; for the finest, polished finish apply Tipo “00” over Fino. Paint with lime-based, breathable products.
How many m² does a 25 kg bag cover?
Material requirement ≈ 12 kg/m² per centimeter. A 25 kg bag covers ≈ 2.1 m² at 1 cm thickness. Maximum ≈ 1 cm can be applied in one layer.
When should I NOT use it?
Do not apply on dirty, dusty, loose substrates, old paint, or leveling layers. Remove salt deposits first. For strong rising damp and salt load, use Zoccolatura salt-blocking plaster.
Can I apply it myself?
Yes, it can be applied by hand or machine, more easily than traditional plaster — especially well sprayable in a thin layer. However, restoring damp, salty walls requires expertise — we also carry out the complete Biocalce system.
