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Electric floors and ceilings, invisible after their installation, radiate a soft and homogeneous heat, without overheating. If they have advantages in common, they are distinguished by their implementation.

Lay ceilings and electric heated floors

Schematic diagram of traditional eclectic floor heating and thin electric floor heating: open pdf Heated floors

Benefits of Electric Heated Ceilings and Ceilings

Electric floors and ceilings have many advantages thanks to their mode of operation. Covered with a concrete slab and / or a covering (floor, tiles...), cables or heating films are invisible. They thus free the space of the room (no convectors or radiant panels) and make it possible to arrange the furniture without constraints.
Another major interest is the mode of diffusion of heat. The whole surface, or almost the floor or the ceiling being hot, it behaves like a huge radiator. The heat is uniform, homogeneous, without convection effect, and therefore does not cause unpleasant air movements, nor black marks on the walls as is the case with traditional electric heaters. Finally, the floor and the heating ceiling operate at low temperature: they deliver a gentle heat, without overheating.

Thinner floors

The electric floor consists of a heating cable placed on an insulator, embedded in a concrete or mortar screed. There are mainly two types of electric heating cable.
The single driver system requires the two ends of the cable to be connected to the connection box. When he is biconducteur, the cables contain both the back and forth wires. They limit the emission of electromagnetic waves and also simplify the installation (connection on one end only). Self-regulating, they provide adequate power according to external heat input and also avoid overheating. For example, when the floor of a piece of furniture, placed on the floor, disturbs the diffusion of heat.

With a thickness of 40 mm, the insulating panels are made of extruded polystyrene or polyurethane foam. If you add 50 to 60 mm of concrete, the total thickness of the underfloor heating is about 10 cm thick without floor covering. In new construction, this is not a problem. For the renovation, manufacturers have developed thin solutions of 22 mm thickness ("Eleavivre" of Acome, "Devimat" Deléage, "Implacable" Stiebel Eltron, "T2 Quick Net" or "T2 Reflecta" Raychem...).

A radiant and insulating ceiling

The radiating plaster ceiling (PRP) is in the form of modules. Composed of a heating film glued on a mineral wool panel 50 mm thick, they are placed on the metal frame that supports the drywall. Heated by the film (35° C maximum), they spread the calories in the room.
The heating ceiling also removes the effect of cold wall: its radiation is partly reflected and absorbed by the walls and the floor. It is well suited to large volumes (up to 3.50 m high). In apartment, its mineral wool panels contribute to sound insulation between floors.
This type of ceiling is between 60 and 75 € HT / m2 per m2. The parts to be equipped with plasterboard, the actual cost of the panels is between 40 and 50 € HT / m2 on average, a cost equivalent to that of cables for underfloor heating.

A heating wall

The principle of the heating wall is based on a tube network fixed on the wall and embedded in a coating. Hot water from a boiler or heat pump flows through these pipes. The company Multibéton recommends this technique in addition to underfloor heating, in order to optimize comfort in rooms where the glass surface is important.

The result of an ecological approach, other recent techniques are more particularly intended to complete a solar thermal installation, one proposes to lay an insulation on the existing wall before placing the tubes and to cover them with "earth" (Akterre). The other is to build brick walls or terracotta tiles, with grooves in which the tubes are inserted before the application of a coating ("Helioterre" and "Ceratherm" Lavalette Center Terre).

The materials used in these different processes, known for their qualities thermal, humidity and phonic, will not only promote exchanges and regulate the ambient humidity, but also promote the radiation of heat and reduce noise.

Install the heating circuit tubes

Akterre - Wem

The tubes of the heating circuit are clipped onto metal rails fixed to the previously insulated wall. Two layers of earth rendering are sprayed and floated. Burlap is stuck on the fresh plaster to prevent cracking.

Lay a heated floor

Lay a heated floor

The self-regulating heating cable is deposited on the polyurethane foam panels, previously arranged on the support.

Pour the concrete slab

Pour the concrete slab

A slab of reinforced concrete is then poured on it before laying the flooring. If you are laying tiling, the concrete is replaced by a mortar screed on which the tiles are sealed. From 30 € / m2, excluding installation, insulation and concrete slab. "Inframat" Deléage.

Insert the heating cable into the grooves of the insulation boards

Insert the heating cable into the grooves of the insulation boards

This thin floor heating process utilizes 13 mm thick, serpentine-grooved, aluminum foil insulated panels that increase the cable's radiating power. The heating cable is inserted into the grooves.

Glue the flooring

Glue the flooring

Then a floor covering, compatible with a heated floor, is glued on. 100 to 120 € / m2 (TVA (5.5%), supplied-laid. "T2 Reflecta" and "T2 Red" from Raychem.

Heated floor: heating cable in self-adhesive weft

Heated floor: heating cable in self-adhesive weft

This thin floor heating system is based on a heating cable self-adhesive weft placed directly on the support, preferably isolated.

Seal the tiles

Seal the tiles

The floor covering, tiling obligatorily, is sealed with the mortar on the frames of films. From 28 € / m2 HT, excluding installation. "Devimat" of Deléage.

Lay a heated ceiling

Lay a heated ceiling

Principle of implementation of a radiating ceiling plaster (PRP).

Lay the ceiling modules

Lay the ceiling modules

The modules of the radiating plaster ceiling are put in place on the metal frame. They are simply placed on the furs, respecting the layout, that is to say the installation plan established by the manufacturer.

Placowatt PRP by BPB Placo.

Insulate with mineral wool

Insulate with mineral wool

Neutral mineral wool modules are interposed in the framework between the heating panels, to complete the insulation where the heating is not needed, and to allow the fixing of luminaires, for example.

Knauf.

Screw drywall

Screw drywall

After connecting the modules and checking their operation, special plasterboards with four thinned edges are screwed onto the furs and then jointed.


Video Instruction: Heated Ceilings: Better Than Heated Floors?