An easier, from the construction point of view and more affordable solution compared to external thermal insulation composite systems, is to apply on the internal side of the walls composite panels which consists of gypsum plasterboard with attached thermal insulation boards.

  In this respect one achieves the desired energy saving and thermal comfort, in a fast, clean and low cost way.






  Styropan provides composite panels of gypsum plasterboard with attached insulation, which can be placed easily and quickly on the inner side of the walls. After they have been fixed on the wall, their joints should be puttied and reinforced with a fiberglass mesh and then their entire surface can be painted.

 The insulation material of the composite panels is either NEOPOR EPS, (the graphite based expanded polystyrene), or STYROPAN XPS (the extruded polystyrene). Due to the lower thermal conductivity both these materials have, compared to other type of insulation products, less thickness is required to achieve the desired insulation, saving thus precious inner space.


Neopor γυψοσανιδα εξηλασμενη XPS γυψοσανιδα


NEOPOR EPS with plasterboard


STYROPAN XPS with plasterboard




γυψοσανίδα XPS και Νεοπορ





icon1 It is preferred in buildings of not continuous use, such as offices, commercial shops, public buildings, schools, theaters, cinemas etc. in which the fast achievement of the desired temperature is a higher priority compared to preserving it for long periods after the heating/cooling system has been turned off.
icon 2

It is an easier, more affordable and fast application, since no scaffolding is required, as in the case of external thermal insulation systems, neither a base coat of reinforced with fiberglass mesh render, neither any special water repellent render/topcoat, besides puttying the joints of the plasterboards and then applying paint for indoor use.

icon 3 Moreover, sometimes it is the only feasible solution for insulating buildings whose façade must not be altered, such as historic buildings or of exceptional architecture.



 The desired temperature is achieved fast, because the insulation is on the inner side of the wall. Nevertheless for the same reason, after the heating/cooling system has been turned off, the area will become quickly cold/hot since the thermal mass of the wall, (its ability to store and emit heat through radiation), cannot be used.


 Nevertheless, it must be taken into consideration that internal insulation does not eliminate the thermal bridges, especially in the joint between a wall and a slab and does not protect the building envelope from temperature fluctuations. Furthermore, it should be studied if vapor condensation is likely to happen between the insulation and the wall. In that case measures should be taken to eliminate the vapor permeability of the wall, by sealing properly any joints between the plasterboard and the walls/floor, by sealing joints between the wall and any pipe or other installation that penetrates the wall and possibly applying vapor barrier paint on the wall.