Influence of finishing coatings on hygroscopic moisture buffering in building elements

Ramos, Nuno M. M.; Delgado, J. M. P. Q.; Freitas, Vasco Peixoto de

doi:10.1016/j.conbuildmat.2010.05.017

Cited by 59 publications

(41 citation statements)

References 3 publications

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“…To prevent from mould growth, chemical add-on may be considered. However, its use is likely to decrease the vapour permeability so as the buffering potential: this was observed in [39] where four different acrylic and vinyl finishing were applied on gypsum boards. Consequently, the rather good performances obtained here may be lowered, yet the same may be true for the other wall assemblies.…”

Section: Influence Of the Thickness Of The Coatingmentioning

confidence: 99%

“…For example, it is well known that the sorption isotherm presents a hysteresis cycle [43][44][45][46], which is likely to impact vapour transfer. However, it is not straightforward to model and many authors are still using the sorption isotherm only [39,47,48]. In the present work, as the numerical results rely on preliminary measurements, we propose to use a simplified approach that neglects the hysteresis.…”

Section: Buffering Potential Of Hygroscopic Materialsmentioning

confidence: 99%

“…A finishing cover is generally applied to indoor sidings in real buildings and this has been shown [39] to significantly decrease the vapour permeability of the material, resulting in a decrease of the buffering effect. For multi-layered walls, it has also been observed [40] that moisture transfers are influenced by the wall assembly.…”

Section: Buffering Potential Of Hygroscopic Materialsmentioning

confidence: 99%

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From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential

Labat

Magniont

Oudhof³

et al. 2016

Building and Environment

111

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. From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential. Building and Environment, Elsevier, 2016, 97, pp.69 -81. 10.1016/j.buildenv.2015 1 From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential ABSTRACTThe development of innovative materials has to respond to both environmental and energy concerns. Bio-based materials are relevant because they are made from renewable raw materials and are carbon neutral. Similarly, unprocessed earth has a very low embodied energy. In this paper, the basic hygrothermal properties of straw-clay samples provided by two French companies were determined. Mixes with densities lower than 450 kg.m -3 would be suitable for use as self-insulating material in current construction. In addition, the material showed a high sorption capacity and very high water vapour permeability. The measurements were then implemented in a numerical model in order to simulate the hygric response of a small room. The straw-clay mixture was found to have a moisture buffering effect of the same magnitude as walls made of hemp concrete and largely higher than conventional walls. The influence of various indoor finishing materials was investigated through additional simulations.

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Section: Influence Of the Thickness Of The Coatingmentioning

confidence: 99%

Section: Buffering Potential Of Hygroscopic Materialsmentioning

confidence: 99%

Section: Buffering Potential Of Hygroscopic Materialsmentioning

confidence: 99%

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From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential

Labat

Magniont

Oudhof³

et al. 2016

Building and Environment

111

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“…The application of coatings on porous substrates such as mortars can decrease permeability [43]. The application of Paint A on the real support implies just a 6% higher µ.…”

Section: Water Vapor Permeabilitymentioning

confidence: 99%

Improving the Impact of Commercial Paint on Indoor Air Quality by Using Highly Porous Fillers

et al. 2017

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In the current paper, the effect on Indoor Air Quality (IAQ) of two commercial acrylic-based paints were compared: one (Paint A) for indoor applications, the other (Paint B) for indoor/outdoor applications. Both were applied on an inert and on a real mortar substrate. The possibility of Paint B to passively improve IAQ was also investigated when adding highly porous adsorbent fillers, both as addition or as total replacement of a conventional siliceous one. The obtained results show that all paints have high capacity to inhibit biological growth. Paint A is more breathable and it has a higher moisture buffering capacity. Paint B negatively modifies the beneficial properties of the mortar substrate for IAQ. However, the use of unconventional fillers, especially as addition to the formulation, allows the recovery of the same properties of the substrate or even the enhancement of about 20% of the ability to adsorb volatile organic compounds (VOCs) under the current test conditions.

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“…Some examples of such detailed measurements can be found in Refs. [6,32,36]. In our case however, the use of a ventilated cladding and the rising of the floor above the ground strongly reduced the risk for high relative humidity to occur within the walls.…”

Section: Materials Propertiesmentioning

confidence: 67%

Dynamic coupling between vapour and heat transfer in wall assemblies: Analysis of measurements achieved under real climate

Labat

Woloszyn

Garnier

et al. 2015

Building and Environment

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Influence of finishing coatings on hygroscopic moisture buffering in building elements

Cited by 59 publications

References 3 publications

From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential

From the experimental characterization of the hygrothermal properties of straw-clay mixtures to the numerical assessment of their buffering potential

Improving the Impact of Commercial Paint on Indoor Air Quality by Using Highly Porous Fillers

Dynamic coupling between vapour and heat transfer in wall assemblies: Analysis of measurements achieved under real climate

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