The Highest Moisture Area in Façade Heat-Insulation Composite Wall Systems with External Plastering

The paper presents calculations of the maximum moisture area in wall systems having facade heat insulation with thin plastering layers. Polystyrene foam boards, extruded polystyrene and mineral wool are used for heat insulation. Three fundamentally different variants of the highest moisture area are obtained as a result of these calculations. Physical explanations and the overheating effect of the wall system are presented in this paper.

энергосбережение, влажностный режим, защита от переувлажнения, плоскость максимального увлажнения, эффект переутепления, тонкий штукатурный слой, пенополистирол, минеральная вата, газобетон, силикатный кирпич, energy efficiency, moisture conditions, excessive moisture protection, maximum moisture, overheating effect, thin plastering layer, polystyrene, mineral wool, aerated concrete, lime brick

1. Gagarin V.G., Kozlov V.V. Teoreticheskie predposylki rascheta privedennogo soprotivleniya teploperedache ograzhdayushchikh konstruktsii [Theoretical prerequisites for calculating reduced resistance to heat transfer of wall structures]. Construction Materials. 2010. No. 12. Pp. 4–12. (rus)

2. Kozlov V.V. Metod inzhenernoi otsenki vlazhnostnogo sostoyaniya sovremennykh ograzhdayushchikh konstruktsii s povyshennym urovnem teplozashchity pri uchete paropronitsaemosti, vlagoprovodnosti i fil'tratsii vozdukha : avtoref. dis. … kand. tekhn. nauk [Engineering assessment of moisture condition of modern wall structures with increased heat-insulating level accounting for vapor permeability, moisture conductivity and air filtration. PhD Abstract]. Moscow, 2004. p. 24. (rus)

3. Hagerstedt S. O. Harderup L. E. Control of moisture safety design by comparison between calculations and measurements in passive house walls made of wood. XII DBMC – Int. Conf. ‘Durability of Building Materials and Components’, 12–15 April, 2011, Porto, Portugal.

4. Pastushkov P.P., Grinfel'd G.I., Pavlenko N.V., Bespalov A.E., Korkina E.V. Raschetnoe opredelenie ekspluatatsionnoi vlazhnosti avtoklavnogo gazobetona v razlichnykh klimaticheskikh zonakh stroitel'stva [Theoretical calculation of moisture in autoclaved aerated concrete in different climatic construction zones]. Scientific and Technical Journal on Construction and Architecture. 2015. No. 2. (rus)

5. Gagarin V.G., Kozlov V.V. O trebovaniyakh k teplozashchite i energeticheskoi effektivnosti v proekte aktualizirovannoi redaktsii SNiP ‘Teplovaya zashchita zdanii’ [Thermal protection and energy efficiency requirements in SNiP "Thermal protection of buildings"]. Scientific and Technical Journal on Construction and Architecture. 2011. No. 7. Pp. 59–66. (rus)

6. Bogoslovskii V.N. Osnovy teorii potentsiala vlazhnosti materiala primenitel'no k naruzhnym ograzhdeniyam obolochki zdanii: monografiya [Fundamentals of material potential moisture theory used in wall structures]. Moscow : MGSU Publ., 2013. P 112. (rus)

7. Perekhozhentsev A.G., Gruzdo I.Yu. Issledovanie diffuzii vlagi v poristykh stroitel'nykh materialakh [Investigation of moisture diffusion in porous building materials]. Bulletin of Volgograd State University of Architecture and Civil Engineering. Series: Construction and Architecture. 2014. V. 35. Pp 116–120. (rus)

8. Hägerstedt O. Calculations and field measurements method in wood framed hoses, Lund University, Report TVBH-XXXX, 2010. In press.

9. Hägerstedt O., Arfvidsson J. Comparison of field measurements and calculations of relative humidity and temperature in wood framed walls. Proc. Sci. Conf. ‘Thermophysics 2010’, Bruno University of Technology, 2010.

10. Sandberg K., Pousette A., Dahlquist S. Wireless in situ measurements of moisture content and temperature in timber constructions. XII DBMC – Proc. Sci. Conf., Porto, Portugal, 2011.