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Kit of materials for mixing on site a lime and cocciopesto plaster:
The mortar for lime plaster and cocciopesto is a genuine product composed of only natural components.
The lime and cocciopesto plaster is suitable both for interiors and for exteriors, giving healthiness to the environments for the transpiring macroporous structure.
The lime and cocciopesto plaster has a good elasticity and adheres perfectly to the supports.
Excellent for creating interior and exterior plasters. The lime mortar and cocciopesto mixed with added water can be applied by hand or by machine, the natural color makes the plaster aesthetically pleasing without having to apply additional finishes or paints.
The excellent vapor permeability also offers a good dehumidifying function. The genuineness and simplicity of the recipe makes this mortar-plaster suitable for the old walls as the realization of new plasters.
Consumption per centimeter of thickness: 15 Kg. Of cocciopesto mortar per sq.m. of lime plaster and cocciopesto
About 11sqm for 1.5cm thick plaster
About 15sqm for 1cm thick plaster
2 sacks of seasoned lime putty (25 x 2 kg)
n.3 coccipesto bags of red cocciopesto (25x3 kg)
n.5 sandbags 0 / 3mm (kg 25x5)
If the Romans with Vitruvius ** in -De architectura- were the first to write surprising qualities of hardness and resistance to water that reaches the mixture of lime and cocciopesto, it seems, however, that the Phoenicians and the Israelites already used similar mixtures of lime, pozzolanic powders and cocciopesto.
If the pozzolanic land was originally used as a natural ground clay, today powders of artificially cooked earth are used, such as the cocciopesto powder contained in the Kit.
The silica present in the cocciopesto powder is combined with lime to form calcium silicate which increases the resistance of the plaster, maintaining a macroporous structure which guarantees the breathability of the plaster.
With the addition of pozzolana or cocciopesto, the lime putty so acquires hardness and resistance to the action of external agents without the need for other binders such as cement or hydraulic lime.
Pour 25 liters of clean water into the mixer
Pour the 3 bags of cocciopesto and spin 1 minute
Add the two bags of seasoned grass
Spin until a homogeneous mixture is obtained
Add the 5 sandbags
Stir again and add more water if necessary until the desired consistency
The plaster is applicable by hand or machine. The old heterogeneous or irregular supports must first be regularized using the same plaster. The walls must be stable, clean and moistened before application.
We recommend a maximum thickness of 1 cm per shot. On damp walls it is advisable to apply shims of at least 3-4 cm since a good thickness of macroporous plaster will confer greater capacity to dispose of humidity of the wall.
It must also be avoided to cover the lime and cocciopesto plaster with synthetic waterproofing paints or coatings as they would prevent the lime reclamation process.
The lime and cocciopesto plaster has a vapor permeability coefficient μ <10.5
- Rustica: with sponging of a second layer of plaster executed fresh on fresh;
- Spatolata: with smooth spatula passage of a second fresh layer on fresh.
- Civil: with subsequent application of lime plaster with medium granulometry.
- Smooth: with the application of fine-grained lime plasters
- Possible coloring with lime paints and natural colors
** Marco Vitruvio Pollione in his book, De Architectura writes: "there is a kind of dust called -pozzolana- which by nature has extraordinary qualities. It is located in the Bay of Naples and in the lands surrounding the Vesuvius. This powder, mixed with lime and sand makes the masonry so stable that it hardens not only in normal buildings, but also under water »
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