PSC and other masonry materials

    Comparative analyze of the materials used in construction work

*The trade names Porotherm and Forati belong to “Wienerberger” Ltd. The trade name Ytong belongs to “XELLA Bulgaria” Ltd.
** Technical data and prices used in this table are taken from the companies sites introducing their products:
-for Porotherm and Forati : www.wienerberger.bg
-for Ytong : www.xella.bg
-for cellular concrete : www. penobeton.bg
-for polystyrene concrete: www.psb-bg.com
*** The prices given do not include VAT, and means FCA factory producer and are valid for 01.06.2010











  1. Masonry with PSC (polysyrene concrete ) is very quick and easy! With only five and a half blocks each weighing around 14 kg. you cover 1 sq. m. The rest - you apply coat on the external walls, on the interior walls-reinforcing net and putty and you save time.
  2. With PSC masonry and the weight of around 80 kg/m2 when you are still on the project faze you gain from the reduced weight. The bearing structure is sized for less constant weight and needs less reinforcement.
  3. The heat conductivity coefficient (λ) for PSC is lower compared with other construction materials i.e. it has the best heat insulation qualities. The costs for heating and heating appliances are greatly reduced.
  4. When build at 25 cm thickness  PSC is the only material shown here which covers the heat conductivity coefficient U ≤ 0,35 W/m²K  for external walls bordering with external air for buildings with medium internal temperature θi < 15 °С, declared in Regulation № 7 for energy efficiency, heat storage and economy of energy in buildings.
  5. Few construction materials do not require installing additional heat insulation and at the same time cover the requirements from Regulation № 7. With the drop of this requirement, you save time and the risk of poor installment of heat insulation does not exist. If the thickness of the masonry is 25 cm PSC creates more effective area and more thinner walls, and most importantly it does not compensate with quality. When calculating the thickness of the insulation a heat insulating material was used which has heat conductive coefficient of 0,035 W/mK.
  6. Water has 25 times more heat conductivity from than air, and ice has 96 times more. Deriving from this heat insulation material needs to have possibly the lowest water absorption rate. PSC distinguishes itself with the lowest possible rate of water absorption and good “breathing”.
  7. Regarding the price PSC also has no competitor. It is obvious that it is the MOST ADVANTAGEOUS from all construction materials, needing no extra insulation and also with these that the costs for a square meter must increase the price from 25 to 40 levs for installing insulation. In the last scenario is needed more time and the risk of poor material used when installing the insulation exists. Even then the criteria for energy savings would not be reached, unlike when PSC is used.