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RESEARCH OF BUILDING MATERIALS

METHODOLOGY OF IDENTIFICATION OF THE OVERALL WATER VAPOUR PERMEABILITY RESISTANCE OF EXTERNAL FINISHING LAYERS OF COMPOSITE THERMAL INSULATION FAÇADE SYSTEMS THAT HAVE EXTERNAL PLASTER LAYERS

Vestnik MGSU 11/2012
  • Gagarin Vladimir Gennadevich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Associate Member, Russian Academy of Architectural and Construction Sciences (RAACS), Chair, Department of Heating and Ventilation, +7 (499) 188-36-07, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Pastushkov Pavel Pavlovich - Research Institute for Building Physics of the Russian Academy of Architecture and Building Sciences (NIISF RAASN) Candidate of Technical Sciences, senior research worker, Research Institute for Building Physics of the Russian Academy of Architecture and Building Sciences (NIISF RAASN), 21 Lokomotivnyy proezd, Moscow, 127238, Russian Federation; +7 (495) 482-40-58; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 140 - 143

The method of identification of the water vapour permeability resistance of finishing layers of
composite thermal insulation facade systems that have thin external plaster layers was developed
by the authors. The above systems comprise one layer of the heat insulation material that has a 5
mm finishing coating. This system is fastened to the building wall. The method is based on the results
of an experiment held to identify the resistance of all systems to the water vapour permeability
irrespective of the availability of finishing layers.
The proposed method is more accurate than any of the previously known methods that contemplate
the experimental determination of coefficients of water vapour permeability of materials
of finishing layers and subsequent calculation of the overall resistance to the water vapour. The
State Standard «Method of Determination of Resistance to the Water Vapour Permeability» that
implements the «wet cup» technology has been applied. The method has been employed to identify
the resistance of finishing layers of BAUMIT insulation system to the water vapour permeability.
BAUMIT has a thermal insulation layer made of mineral cotton. It has been identified that the overall
resistance of the finishing layer to the water vapour permeability, as determined in accordance with
the methodology developed by the authors, is twice as less efficient than the overall resistance
identified in accordance with prior methodologies. This difference in the characteristics of finishing
layers essentially raises the accuracy of projections of the moisture behaviour of all composite facade
insulation systems that have thin external plaster layers.

DOI: 10.22227/1997-0935.2012.11.140 - 143

References
  1. Gagarin V.G. Teploizolyatsionnye fasady s tonkim shtukaturnym sloem [Thermal Insulation Facades That Have Thin Plaster Layers]. Zhurnal AVOK [AVOK Journal]. 2007, no. 6, pp. 82—90.
  2. Gagarin V.G. Temperaturno-vlazhnostnye vozdeystviya i dolgovechnost’ sistem s tonkim shtukaturnym sloem [Effects of Temperature and Moisture and Durability of Systems That Have Thin Plaster Layers]. Zhurnal AVOK [AVOK Journal]. 2007, no. 7, pp. 66—74.
  3. Cziesielski E., Vogdt F.U. Sch?den an W?rmed?mm-Verbundsystemen. Stuttgart, 2000, 206 p.
  4. Aleksandrov A.V. Sistemy naruzhnogo utepleniya: problemy vybora i kriterii otsenki [Systems of External Heat Insulation: Problems of Choice and Assessment Criteria]. Stroyprofi l’ [Building Profile]. 2005, no. 4, pp. 18—19.
  5. Rukovodstvo po raschetu vlazhnostnogo rezhima ograzhdayushchikh konstruktsiy zdaniy [Guidebook for Analysis of Moisture Conditions of Filler Structures of Buildings]. Moscow, Stroyizdat Publ., 1984, 168 p.
  6. Gagarin V.G., Kozlov V.V. Matematicheskaya model’ i inzhenernyy metod rascheta vlazhnostnogo sostoyaniya ograzhdayushchikh konstruktsiy [The Mathematical Model and Engineering Method of Analysis of Moisture Conditions of Filler Structures]. Academia. Arkhitektura i stroitel’stvo. [Academy. Architecture and Civil Engineering]. 2006, no. 2, pp. 60—63.
  7. Carmelieta J., Deromeb D. Temperature-driven Inward Vapor Diffusion under Constant and Cyclic Loading in Small-scale Wall Assemblies. Part 2. Heat-Moisture Transport Simulations. Building and Environment. 2012, vol. 47, January, pp. 161—169.
  8. GOST 25898—83. Materialy i izdeliya stroitel’nye. Metody opredeleniya soprotivleniya paropronitsaniyu. [State Standard 25898—83. Construction Materials and Products. Methods of Identification of Resistance to Vapour Permeability].

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