A review of moisture buffering capacity: From laboratory testing to full-scale measurement

Cascione, Valeria; Maskell, Daniel; Shea, Andrew; Walker, Peter

doi:10.1016/j.conbuildmat.2018.12.094

Cited by 47 publications

(24 citation statements)

References 37 publications

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“…Moisture Buffer Value [8]. However, as [9] comments, it is unclear how this could be applied to examine moisture buffering in real buildings which experience far more variable environmental conditions. In addition, real buildings have added complexities such as surface finishes (e.g.…”

Section: Moisture Bufferingmentioning

confidence: 99%

Challenges in developing a moisture metric to assess air change rates

Ahmed¹,

Altamirano²,

Rovas³

et al. 2021

Challenges in Developing a Moisture Metric to Assess Air Change Rates

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Air change rates are difficult to measure in naturally ventilated buildings. There is incentive to develop alternative techniques to measure air change rates. Using a moisture metric is a possibility, but this is challenging as it requires the ability to quantify processes that affect the moisture balance in a room. This paper consolidates literature about how the moisture balance can be understood in field studies in terms of moisture generation, moisture buffering, and ventilation. Moisture generation rates have been reported in literature with some disparity. Moisture buffering is difficult to account for due to the complexity of the process in real buildings. Ventilation can be measured using tracer gas techniques, but these often provide a 'snapshot' of the air change rate which varies both spatially and temporally in buildings. However, a promising approach has been identified whereby moisture and ventilation conditions are examined over a longer period of time i.e. weeks.Peer-review under the responsibility of the organizing committee of the ICMB21.

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Section: Moisture Bufferingmentioning

confidence: 99%

Challenges in developing a moisture metric to assess air change rates

Ahmed¹,

Altamirano²,

Rovas³

et al. 2021

Challenges in Developing a Moisture Metric to Assess Air Change Rates

View full text Add to dashboard Cite

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“…According to the NORDTEST protocol, 5 we can evaluate the buffer effect of material by Moisture Buffering Value (MBV), which can be obtained by direct experiment or approximate model. 6 There now exists a vast body of literature on MBV. Iñaki et al 7 developed a PC-tool program to calculate the MBV of hygroscopic materials.…”

Section: Introductionmentioning

confidence: 99%

“…The first factor to consider is air exchange. 6 Shi et al 13 have demonstrated that by increasing the ventilation rate, the moisture buffering effect would decrease. Another consideration is related to moisture transport mechanism in walls.…”

Section: Introductionmentioning

confidence: 99%

“…Moisture moves through enclosure, due to water vapour pressure or RH differential between the indoor and the outdoor. 6 The moisture buffering effect could potentially be amplified by an accurate design of the whole enclosure. 6 Cascione et al 12 described that the layer under the interior finish could balance the indoor moisture together with the hygroscopic material.…”

Section: Introductionmentioning

confidence: 99%

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Moisture buffering effect of hygroscopic materials under wall moisture transfer

Yang

Kong

2020

Indoor and Built Environment

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Hygroscopic material can moderate the indoor humidity variation due to its moisture buffering effect. This effect would change when used as interior finish mainly due to air exchange and wall moisture transfer. The author focused on clarifying the extent of the wall'’s influence on indoor moisture buffering and building humidity environment. A room model was established and the situation of no wall moisture transfer was simulated by adding a vapour barrier between the interior finish and the wall. Comparing this result with wall moisture transfer, the moisture buffering effect of the wall can be quantitatively analysed. The results verify that the buffering effect and the humidity environment, especially the seasonal buffering, change with the wall moisture transfer. The wall has great impacts on buffering in the cases of thin interior finish, high moisture production and low ventilation. Because the layer under the hygroscopic material also has buffering capacity, the difference of using various thicknesses of material is not obvious. Frequent ventilation reduces the buffering effect but improves the RH optimality.

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“…Moisture-related problems can be distinguished predominantly in old masonries, notwithstanding, modern airtight building envelopes suffer from limited moisture evaporation. Considering the recent knowledge, the level of moisture content is accompanied by health risk for building occupants due to correlation with indoor relative humidity [2,5]. Specifically, since the people spend in building interiors a significant part of the day, health problems such as allergic rhinitis, eye or skin irritation, eczema, asthma, coughing, and wheezing can be expected in case of unsatisfactory indoor air quality [6,7].…”

Section: Introductionmentioning

confidence: 99%

Utilization plasters with superabsorbent admixture to moderate moisture level in constructions

et al. 2020

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The level of indoor humidity has to meet several criteria according to the preservation of a healthy indoor climate for building inhabitants. On top of that, the undesired moisture content is associated with a proliferation of various organisms which results in an adverse effect on the durability of building materials. Facing the impact of climate change and excessive energy consumption associated with building maintenance, the employment of passive moderation techniques takes place to avoid the usage of energy-demanding HVAC devices. The application of advanced materials such as superabsorbent polymers (SAPs), commonly used in diapers or other hygiene products, can bring a very effective solution for this issue overcoming. In this paper, the effect of 0.5; 0.1 and 1.5 wt.% dosages of SAPs incorporated into a cement-lime plaster are studied to evaluate the material performance in the sense of moisture moderation. First, the basic material properties, moisture transport and storage properties, thermal conductivity and specific heat capacity are determined to access the influence of SAP admixtures on the functional performance of studied plasters. Consequently, the experimentally accessed results are further employed for the computational modeling analysis which evaluates the capability of studied plasters for the moderation of moisture content in constructions.

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A review of moisture buffering capacity: From laboratory testing to full-scale measurement

Cited by 47 publications

References 37 publications

Challenges in developing a moisture metric to assess air change rates

Challenges in developing a moisture metric to assess air change rates

Moisture buffering effect of hygroscopic materials under wall moisture transfer

Utilization plasters with superabsorbent admixture to moderate moisture level in constructions

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