Coating

see also: Etymology of Coating

The coated is a layer of mortar applied to a wall. It has a function, that to protect the wall, and a role, that to embellish the frontage all while insulating it. The colors obtained are very varied. They depend on the Granulat S employed but also on the Pigment S which one can add to it.

components of the coating:

The coatings consist of a binder (lime, plaster, cement or ground) and mineral loads (aggregates, or aggregates, as the marble sand or dust). The addition of pigments (coloring loads) is not essential, it depends on the required effect.

types of coatings: There exist two main categories, the coatings prepared on the building site, and the industrial coatings ready with employment.

The traditional coating prepared on the building site is generally carried out in three successive layers, applied to the hand or the machine.

The FIRST LAYER Of a TRADITIONAL COATING SHOULD NOT BE CARRIED out BEFORE a ONE MONTH DEADLINE AFTER HAVING FINISHED BUILDING the SUPPORT (to avoid any cracking and éfloressance)

the gobetis is a liquid semi layer thrown on the wall, strongly proportioned with a load of important granulometry (0/6mm) which makes it possible to have good hangs. The thickness of the gobetis is generally the same one as that of the granulometry of sand (5 or 6 mm) used. It dries in approximately three days.
raising, known as also trimmed or body of coating , is a layer which makes it possible to catch up with the lacks of flatness. The mortar used must be plastic with slackness (granulometry o/4mm), it is thrown and drawn with the rule. One voluntarily leaves rough surface to support hangs it. This layer made généralemant 8 to 12 mm thickness. The completion will be effectuable only after one minimum time eight days according to trimmed.
the completion is the last layer. The mortar, pastic with slackness, is spread out using a liana, one to platoir or of a smoothing machine. The completions are innumerable: plastered (wood, sponge or plastic), smoothed, frozen, scraped, brushed etc… This layer does not make more than 5 to 7 mm thickness.

The choice of the colors remains a business of taste, it is possible to pass a patina, a strong water or a paint to modify them. The very ready coatings out of bag, are generally full-course. They are done exclusively with the machine. The color of these coatings can be selected in a rather broad pallet. These coatings are mainly used in the new buildings. They have a defect however: because of their low thickness, they let appear the phantoms when the atmosphere is wet.

This article explains the repair of a coated . A coating can be:

the mixture of two thirds of white Sand and a third of lime;
the mixture of lime and plaster;
the mixture of hydraulic lime and pit sand;
the mixture of ana of flax, lime and pit sand.

The “clay completion” is an interior finishing coat of color, containing ground.

The mixture can be carried out with the concrete-mixer. One uses hydraulic lime in place of air lime to accelerate the catch.

A coating of Ciment or plaster cannot be repaired that if it is in general good state and that only some plates fell apart.

Types of coating

There exist several types of coating. The interior coatings and the external coatings are distinguished. The interior coatings can be coatings of Platre to stop the large cracks, but there exist coatings known as " of Smoothing ". The finer latter and preparing more liquid, in particular make it possible to make the walls most finished possible.

Application of the coating

To prick with the graver the damaged parts.
To vacuum-clean and wet abundantly.
To prepare a liquid mortar and to project a thin layer with the trowel of it.
To let dry one half-day.
To prepare a proportioned mortar with 2 sand L per kg of cement.
To throw the mortar on the holes, to smooth it and level it with the hawk.
With the brush, the trowel or the hawk, to give the same aspect as the coating of origin.
the placement of the plaster - lime must comply with the code of practice

Because of the presence of lime in the product, it is imperative to wear gloves. It is advised to let less coatings possible exceed hole or crack to be stopped and to privilege a passage in two layers (the second, once first dries) in order to obtain a result of quality.

External bonds

the coating in the écohabitat comparative a graft lime, cement and ground

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