DCD IDEAL spol. s r.o.

Generally, we recommend that you use the ETICS contact heating system; you have several materials to choose from, which are available on the market and intended for this kind of application. Whether it’s EPS, mineral fibre or PUR/PIR foams, always choose the materials based on their utility properties in terms of value for money. The comparison of invested resources relative to the return of investment is essential when choosing the insulation type.

EPS 70 F is the optimal and most frequently used for contact heating systems. In case lower insulation thickness is required but with the same thermally insulating properties, you can also use EPS NEO 70 or EPS 100 F with higher strength. For recommended applications of foam polystyrene, sorted by type and application, see page 12 of our catalogue.

EPS 100 or higher is suitable for floor insulation. In addition to your own requirements, the thickness should also be in conformity with ČSN EN 730540 and the EPBD II directive. The optimal decision is to devise balanced heating for the entire building envelope with good return of investment, which is something the project engineer can help you with. For informative EPS thickness values for individual designs, see page 2 of our catalogue.

If your project documentation has a minimum heat resistance R or a maximum heat permeability coefficient U specified, you can find the corresponding thickness values for individual EPS types on page 10 and 11 of our catalogue.

The thermal conductivity coefficient values for individual EPS types are included in the technical sheets on page 4 and 5 of the catalogue.

Actually, quite the contrary as long as outer heating is used.

The heating significantly or entirely reduces the condensation of water vapours within the structure. The temperature at the inner surface of the circumferential walls is higher and therefore further from the dew point, which in turn prevents mould formation. Potential mould problems are not due to the outer heating, but rather lack of heating of significant thermal bridges within the structure (e.g. window cases), as well as with lack air circulation (insufficient ventilation), which would otherwise contribute significantly to the water condensate evaporation.

On the contrary. The insulation either “breathes” or provides thermal insulation. A contact heating system (whether based on EPS or cotton-wool) is enclosed on the outside by an impregnable material (plaster, fine mortar, water insulation), which is why its air (as well as moisture) permeability is rather undesirable due to the condensation of water vapour with the cold surface. House walls generally let through a maximum of 4% of air with the internal moisture, which is why a vast majority of the moisture always needs to be ventilated. For example, wooden buildings have a structure fitted with steam insulation, which completely eliminates the “breathing” of the wood. EPS is among materials with medium water vapour permeability (m factor = 20–50).