Wooden

Heat Insulation of pitched wooden roof

Heat insulation of pitched roof internally with suspension of false ceiling

In the case of existing wooden roof visible from the inside it can be given solution with the suspension of not aired false ceiling, on which will step the insulating plates. That way the volume of space that is heated can be considerably decreased and avoid the shifting of hot air due to the operation of heating during winter in the higher point of the roof. In the solution of false ceiling it is required good fixing of hooks of its suspension. For its manufacture metal skeleton is used, on which prefabricated plates are supported from organic or inorganic materials (plasterboards, cement boards, plates of mining fibers, sticks from plastic, metal etc).

As heat insulating layer can be used Expanded Polystyrene with graphite NEOPOR TX EPS 100 or ISOPLAK TX EPS 120, ISOPOR EPS 80 and ISOCOAT TX EPS 80 in the suitable thickness according to the regulation of Energy Efficiency of Buildings.

Heat Insulation of concrete roof under a non-heat insulated wooden roof

In this case insulation is applied on the horizontal plate of concrete that is found under the roof. With this method the volume of heated space can be considerably decreased. It is a very simple construction and if it is done carefully it does not require specialized people. The heat-insulating layer is simply placed on the plate of concrete that previously has been smoothed and cleaned. On the heat-insulating layer and in the same distance certain bricks or other heavy materials are placed as stabilizer weights. The heat-insulating layer should remain free and not be covered with leaves of polyethylene (nylon) or other impenetrable from water vapors material because it can cause condensation of diffused water vapors from the internal space.
In heat insulation of concrete roof the use of Expanded Polystyrene is suggested with graphite ΝΕOCOAT TX EPS 100 or ISOPLAK TX EPS 120, ISOPOR EPS 80 and ISOCOAT TX EPS 80 in suitable thickness according to the regulation of Energy Efficiency of Buildings.

External heat insulation of pitched wooden roof

The external heat insulation of roof is separated in conventional and reversed type depending on the place of heat insulation and the sealing layer as in the heat insulation of a room:

Conventional type exterior heat insulation of roof

In a wooden roof the linking components are covered with a wooden sub layer (sheathing) that is nailed on the beams. Above the sheathing, a membrane is bonded or nailed that will be used as dam of water vapors. Using wooden frames we shape a grid and in the intermediary gaps we place the heat insulating material. Above this is placed the sealing membrane, which is nailed with wide head nails on the wooden frames. In the position of each nail interferes a layer of synthetic material or other flexible material, in order to avoid the infiltration of water from the places of the holes that are opened in the membrane. Alternative, it can also be shaped a second wooden sub layer above the heat insulating layer and this can be nailed or stuck on the sealing membrane.

Above the membrane in regular spaces benchmarks are fixed horizontally for fixing the tiles between which is placed a second layer of heat insulating material in order to decrease any thermal bridges that are created by the wooden frames of the first layer. If before placing the horizontal benchmarks is put another layer with wooden chevrons, then the roof has became aired with the use of suitable holes of airing for the air entry from the end of tiles and the exit of now hot air from the high point of the roof. In this case if a second layer of heat insulating is used in order to maintain the airing gap, the thickness of the heat insulation should be smaller than the thickness of chevrons.

For the first heat insulating layer is suggested the use of Expanded Polystyrene with graphite ΝΕOCOAT TX EPS 100 or ISOPLAK TX EPS 120, ISOPOR EPS 150 and ISOCOAT TX EPS 80 and for the second ΝΕOCOAT TΤ EPS 100 or ISOPLAK TX-ΤΤ EPS 120 and ISOCOAT TΤ EPS 80 in total thickness according to the regulation of Energy Efficiency of Buildings.

Reversed type exterior heat insulation of roof

In a wooden roof the linking components are covered with a wooden sub layer (sheathing) that is nailed on the beams. Above the sheathing, a membrane is bonded or nailed. However in the case of reversed type this membrane functions simultaneously as dam for water vapors and a sealing layer. Using wooden frames we shape a grid and in the intermediary gaps we place the heat insulating material. Alternatively it can be covered with wooden sub layer or remain free. Above the heat insulating layer in regular spaces benchmarks are fixed horizontally for the anchorage of tiles between which a second layer of heat insulating material is placed in order to decrease thermal bridges that are created by the wooden frames of the first layer If before placing the horizontal benchmarks is put another layer with wooden chevrons, then the roof has became aired with the use of suitable holes of airing for the air entry from the end of tiles and the exit of now hot air from the high point of the roof. In this case if a second layer of heat insulating is used in order to maintain the airing gap, the thickness of the heat insulation should be smaller than the thickness of chevrons.

Alternatively, instead of using the heat insulating materials above, we can use the system for inclined roofs ISOLTETTO which is shaped Expanded Polystyrene (EPS) with special airing channels and channels/drivers for the placement of horizontal benchmarks in the suitable way for the Roman and Dutch (concrete) tile with surface 35,7cm and eliminates any thermal bridges thus a second heat insulating layer and layer of airing is not needed. It is placed in suitable thickness according to the regulation of Energy Efficiency of Buildings. ISOLTETTO offers big facility and speed in the manufacture assembling in one layer all the rest.

The ventilation on the roof in countries such as Greece that have great sunlight is absolutely essential because in the tiles the temperatures can be above 60oC at summertime because the sun rays strike almost vertical the roof for a long time during the day and lead to overheating of the roof complicating the work of the heat insulating layer particularly in the case of existence of thermal bridges but even without them. The layer of suitably calculated airing layer with rightly calculated holes in the base and the top of tile layer abducts in permanent base part of heat that absorb the tiles and turns it in the atmosphere, since motionless air that exists between the tiles and the heat insulating layer is kept warm, its density is decreased and goes up coming out from the holes at the top of the roof giving its place to fresh cool air creating a current of air that helps the operation of the roof and the heat insulating layer.

Internal heat insulation of roof

If it is a wooden roof then the inner side of the plate develops a wooden or metal grid of thin slats, secured to it with strong plugs or preloaded hooks. The plates of insulating material secured to the spaces between the grid with plugs or pasted with glue, which does not affect the foam (eg cement glue). Depending on the desired aesthetic result the entire structure can be lined with plasterboard, particleboard, fiberboard, plywood wood panels or other panels, fastened onto the forearms of the grid.

For the first heat insulating layer is suggested the use of Expanded Polystyrene with graphite ΝΕOCOAT TX EPS 100 or ISOPLAK TX EPS 120, ISOPOR EPS 80 and ISOCOAT TX EPS 80 in total thickness according to the regulation of Energy Efficiency of Buildings.