ZEMCH 2015 - International Conference Proceedings | Page 718

Thermal and Daylight Evaluation
One classroom on the third floor was evaluated; see the red rectangle on the building facade in
the state before and after the school renovation (Fig.1). The reason of the evaluation was for the
influence of internal thermal insulation layer on thermal balance and daylighting with classroom.
Thermal Analysis
Thermal analysis was completed for evaluation of the state before and after the energy renovation and window retrofitting. Evaluation was carried out for one characteristic classroom located
on the third floor. Solid brick masonry of 450 mm was insulated with 80 mm of foam polystyrene.
The external wall was evaluated for an assessment of the risk of interstitial condensation due to
water vapour diffusion (EN ISO 13788 2012; CSN 730540-2 2011). The evaluation was completed for
the state before and after renovation and for the extreme winter outdoor design conditions (in
December) and summer season average temperature (in June).

Figure 2: Partial pressures of water vapour and condensation regions within the wall construction
before the renovation: I- internal plaster, II – brick masonry wall, III – external plaster; after the renovation: I- internal plaster, Ia – polystyrene layer 80 mm, II – brick masonry wall, III – external plaster; p
[Pa] … pressure, sd [m] … equivalent diffusive thickness; pv … partial pressure, pv, sat … saturated
partial pressure, pt … theoretical pressure, i … interior, e … exterior; Winter – January: outdoor design
temperature - 15°C (winter extreme), relative humidity 84%; Summer – June: outdoor temperature +
15.8°C: (average), relative humidity 72.1%

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ZEMCH 2015 | International Conference | Bari - Lecce, Italy