A rendering or repellado is a layer of mortar "Mortar (construction)") used to cover a wall or a wall. In plastering you can use cement mortar, lime mortar, earth mortar"), or a bastard mortar") which would be a mixture of the above.
Nomenclature of coatings
It is a common practice in architecture to cover walls and walls with homogeneous and continuous layers of different materials to improve their properties or simply their appearance. The materials most used as coatings are 'mortars': mixtures of a binder, sand, and water, which set and/or carbonate while they dry. Depending on the type of binder used, the application techniques differ, and the coatings have different properties, therefore adopting different names: whitewash, render, trim, plaster, jabelga, stucco, etc.
Characteristics
Portland cement mortar or simply 'cement mortar', was developed in the middle of the century, and less than a century later it already surpassed lime mortars in popularity, which is currently little used.
Among mortar coatings, rendering is the hardest and most resistant, and also the most durable. These properties make it the most used coating on walls and exterior walls: painted, it is the usual finish on facades of low-budget homes, and on practically all party walls.
As negative aspects, (Portland cement) is excessively rigid (it cracks easily), and has a very poor final appearance, so the usual practice is to use it as a support for a new finishing coating, which can consist of a simple paint "Paint (material)"), or a new layer of a finer material, called render.[1].
Usually, an apparent dry density of 2000 kg/m is established.
Application method
To make the mortar, the binder (cement and/or lime), sand "Sand (concrete)") and water "Water (concrete)") are mixed, with common proportions of one part cement to five parts sand, and water until a fluid consistency of the material is achieved. It also exists in premixed dry form, in 25kg bags. All that remains is to add water at the construction site.
Plastering
Introduction
A rendering or repellado is a layer of mortar "Mortar (construction)") used to cover a wall or a wall. In plastering you can use cement mortar, lime mortar, earth mortar"), or a bastard mortar") which would be a mixture of the above.
Nomenclature of coatings
It is a common practice in architecture to cover walls and walls with homogeneous and continuous layers of different materials to improve their properties or simply their appearance. The materials most used as coatings are 'mortars': mixtures of a binder, sand, and water, which set and/or carbonate while they dry. Depending on the type of binder used, the application techniques differ, and the coatings have different properties, therefore adopting different names: whitewash, render, trim, plaster, jabelga, stucco, etc.
Characteristics
Portland cement mortar or simply 'cement mortar', was developed in the middle of the century, and less than a century later it already surpassed lime mortars in popularity, which is currently little used.
Among mortar coatings, rendering is the hardest and most resistant, and also the most durable. These properties make it the most used coating on walls and exterior walls: painted, it is the usual finish on facades of low-budget homes, and on practically all party walls.
As negative aspects, (Portland cement) is excessively rigid (it cracks easily), and has a very poor final appearance, so the usual practice is to use it as a support for a new finishing coating, which can consist of a simple paint "Paint (material)"), or a new layer of a finer material, called render.[1].
Usually, an apparent dry density of 2000 kg/m is established.
Application method
It is advisable to first moisten the supporting facing "Facing (architecture)" so that the mixture does not dry excessively quickly, preventing the material from setting correctly.
The mortar can be applied "sightly", "mastered", "mudred" or "burnished", in an analogous way to trim and plastering.
Normally it is usually done by forcefully throwing shovels of cement against the surfaces to be covered; This method generates very rustic-looking bumps, which is why plastering is used in rustic construction environments. Finally, it is usually whitewashed to give a feeling of cleanliness.[2].
It is normally applied to exterior walls, although it can be used both indoors and outdoors, even on ceilings or floors. Sometimes it can be rubbed with a trowel to give a flatter or coated finish; This final treatment is the only one that is repeated for a small deterioration of the wall.
References
[1] ↑ Ricardo Marcos y Bausá. Manual del albañil. Madrid, 1879. p. 218 y sig.
[2] ↑ Justin McGuinness (1 de marzo de 2002). Footprint Marrakech & the High Atlas handbook: the travel guide. Footprint Travel Guides. pp. 277-. ISBN 978-1-903471-12-8. Consultado el 2 de abril de 2012.: http://books.google.com/books?id=dNWYJivU5vgC&pg=PA277
To make the mortar, the binder (cement and/or lime), sand "Sand (concrete)") and water "Water (concrete)") are mixed, with common proportions of one part cement to five parts sand, and water until a fluid consistency of the material is achieved. It also exists in premixed dry form, in 25kg bags. All that remains is to add water at the construction site.
It is advisable to first moisten the supporting facing "Facing (architecture)" so that the mixture does not dry excessively quickly, preventing the material from setting correctly.
The mortar can be applied "sightly", "mastered", "mudred" or "burnished", in an analogous way to trim and plastering.
Normally it is usually done by forcefully throwing shovels of cement against the surfaces to be covered; This method generates very rustic-looking bumps, which is why plastering is used in rustic construction environments. Finally, it is usually whitewashed to give a feeling of cleanliness.[2].
It is normally applied to exterior walls, although it can be used both indoors and outdoors, even on ceilings or floors. Sometimes it can be rubbed with a trowel to give a flatter or coated finish; This final treatment is the only one that is repeated for a small deterioration of the wall.
References
[1] ↑ Ricardo Marcos y Bausá. Manual del albañil. Madrid, 1879. p. 218 y sig.
[2] ↑ Justin McGuinness (1 de marzo de 2002). Footprint Marrakech & the High Atlas handbook: the travel guide. Footprint Travel Guides. pp. 277-. ISBN 978-1-903471-12-8. Consultado el 2 de abril de 2012.: http://books.google.com/books?id=dNWYJivU5vgC&pg=PA277