Assembly of single tiles when constructing a stove into a whole, is called tile covering. It provides a ceramic shell around a chamotte stove in which higher temperatures occur on the inner surface rather than outer. Heat energy comes out from the inside to the outside through thick chamotte, air gap, tiles and glaze. Average surface temperatures of a chamotte stove (without covering) may be, in an uncontrolled way, higher than recommended and therefore it is necessary to provide a buffering baffle which is able to equalise, alleviate but also prolong emission of heat coming out of the interior during heating.
Usually installation of covering is performed by a stove-fitter or an employee trained in this respect. Designs of coverings are various and as a rule, do not reflect the equipment inside itself. In a similar way a covering on a furnace or chamotte stove is made. It should be provided with an expansion gap between heat wall and ribbing on the back of a tile. The offset distance (about 2cm) is case specific, and mostly recommended by the manufacturer of tiles but already included in construction of various chamotte stoves, e.g. TermoKaust, in dimensions and heating capacity. Very warm air produced by walls of the stove circulates and flows around a space created as a result of building over, while equalises its temperature transferred to the ceramic covering. Therefore a natural effect of a uniform temperature distribution is achieved. Thus equalisation of heat radiation emissions in all directions into a room is reached. Heat from glazed ceramics is received by us ourselves excluding the air as an energy carrier, thus heating using a heat-storing stove is such healthy and recommended, does cause the air to dry out and the dust to burn.
Therefore it is important to take care of a regular daily fuel combustion rather than just heating using an instant high temperature of the stove surface. Most of stove bodies are cuboids with narrowings, and thus corners and areas furthest from the wall, are heated as last. In a regular combustion cycle it is of minor importance as the stove body is warmed relatively uniform. Tile covering and tiles themselves take no part in the combustion process and cannot be used for construction of furnaces and stoves. For covering, suitable adhesives and mortars, and also steel and concrete reinforcements are used. Finishing is provided by applying a grout in gaps between tiles. Tightness of tile covering should be enough so a very hot air does not leak out of the interior and change the system used into a convection system, unless it is desired. Such solution is applied with hearth stoves in which inside a covering a cast-iron or steel insert is incorporated instead of a chamotte stove. It is then a case of a convection heating rather than heat-storing, though the covering itself is able to store a considerable part of energy and performs its function.