Moisture Control in Buildings: The Key Factor in Mold Prevention—2nd Edition

Trechsel, Heinz R.; Bomberg, Mark

doi:10.1520/mnl18-2nd-eb

Cited by 22 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This effect can be prevented by the design of the wall if it can stay below a certain temperature and relative humidity over a period of time [Figure 2] (Hukka & Viitanen, 1999). Decay fungi, also known as brown-rot or softrot fungi, does not begin its germination until about 95% relative humidity, making for the familiar blue-stain mould fungi the governing design conditions as its relative humidity requirement for germination is much lower (Trechsel & Bomberg, 2009).…”

Section: Mould Appearance and Growth Predictionmentioning

confidence: 99%

“…Plywood or OSB can be used as the main component of a vapour retarding system with the one caveat of being hygroscopic materials that are susceptible to decay if exposed to high levels of moisture. A safe level of 16% moisture content was cited as the safe cutoff threshold for fungi on a wood surface and generally considered a conservative value (Trechsel & Bomberg, 2009). Generally, plywood was found to dry slightly faster than OSB in wall assemblies using different wetting strategies (Teasdale-St-Hilaire, Derome, & Fazio, 2004).…”

Section: Osb and Plywood As Smart Vapour Retardersmentioning

confidence: 99%

See 1 more Smart Citation

Vapour Diffusion Open Arctic Wall: A Comparison of Moisture Accumulation Potential Versus Other Cellulose Superinsulation Strategies

Brun¹

2021

Preprint

View full text Add to dashboard Cite

Superinsulation is becoming increasingly attractive in the construction of energy efficient new homes or energy retrofit projects. By increasing the thermal insulation inside walls, new possible unforeseen building durability issues arise that were otherwise not present during standard 2”x6” construction, as there is less potential for drying. The reduced drying is often attributed to using low permeance materials in the building enclosure. One method to combat the reduced drying potential is to use the highest permeable vapour diffusion open materials for all building enclosure components such as the “Arctic Wall”. The purpose of this study is to determine how the Arctic Wall performs in Fairbanks, Alaska in addition to other climates, and how it also compares with other common vapour diffusion open methods. The results of experimental simulation using WUFI 5.2 hygrothermal software have shown that all vapour diffusion open walls have a potential for condensation that is most dominated by the heating load across the climates that were tested. The Arctic Wall was found to be safe to use in all climates using the tested methods, but still poses a potential risk due to potential condensation due to air leakage. The results of this study have shown that the Arctic Wall performed on par with other vapour diffusion open strategies.

show abstract

Section: Mould Appearance and Growth Predictionmentioning

confidence: 99%

Section: Osb and Plywood As Smart Vapour Retardersmentioning

confidence: 99%

Vapour Diffusion Open Arctic Wall: A Comparison of Moisture Accumulation Potential Versus Other Cellulose Superinsulation Strategies

Brun¹

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Therefore, the operable area of a window should be carefully considered. Directly blocking the external moisture can be achieved not only by less opening area, but the vapour retarder also plays a vital role in it (Trechsel and Bomberg, 2010). The majority of buildings across the Yangtze River Delta have vapour retarders only for the roof and the basement, other than on facades.…”

Section: Decrease the Humidity With Envelope Designmentioning

confidence: 99%

Untitled

2020

JCDC

View full text Add to dashboard Cite

Indoor mould is usually discussed for the building operation phase rather than the design stage. Moreover, the majority of existing studies were conducted by mechanical engineers rather than architects, who typically have a broader view of the whole project. The purpose of this article is to obtain a quantitative mould risk scenario across the Yangtze River Delta in China and make a matrix including all the possible design options to reduce the mould risk. A series of software is utilised to simulate the mould risk in three main cities across that region. Simulation results confirm high mould risk in all selected cities and the mould growth rates in different orientations match the Wind-Driven Rain diagram. After the simulation, all factors that can be tuned for the mould prevention were analysed. It is found that only humidity and substrate (material of finishing layer) characteristics can be practically controlled for mould avoidance. Meanwhile, the development design stage is the essential design phase while the envelope is the most crucial building element for mould prevention.

show abstract

“…Variation of solar intensity and its spectral composition from daylighting has been correlated with improved health and performance in building occupants (Figueiro et al 2017;Alrubaih et al 2013). Opaque envelope components can increase the habitable floor area in buildings by increasing the temperature in the perimeter zone, and improvements in air sealing and moisture control can improve comfort and reduce the risk of mold growth and decay that can lead to respiratory problems (Treschel and Bomberg 2009).…”

Section: All Dynamic Window and Opaque Envelope Technologiesmentioning

confidence: 99%

Grid-interactive Efficient Buildings Technical Report Series: Windows and Opaque Envelope

Harris

2019

View full text Add to dashboard Cite

These definitions are for the purposes of the Grid-interactive Efficient Buildings Technical Report Series. They may be defined differently or more generally in other contexts. Grid services Services that support the generation, transmission, and distribution of electricity and provide value through avoided electricity system costs (generation and/or delivery costs); this report focuses on grid services that can be provided by grid-interactive efficient buildings. Distributed energy resource (DER) A resource sited close to customers that can provide all or some of their immediate power needs and/or can be used by the utility system to either reduce demand or provide supply to satisfy the energy, capacity, or ancillary service needs of the grid. Load profile A building's load profile describes when-time of day or hour of the year-the building is consuming energy (typically used to refer to electricity consumption but can also describe on-site fuel use); load shape and load curve are often used interchangeably, but all refer to the timing of energy use. Energy efficiency Ongoing reduction in energy use to provide the same or improved level of function. Demand flexibility Capability of DERs to adjust a building's load profile across different timescales; energy flexibility and load flexibility are often used interchangeably with demand flexibility. Demand response Change in the rate of electricity consumption in response to price signals or specific requests of a grid operator. Demand-side management The modification of energy demand by customers through strategies, including energy efficiency, demand response, distributed generation, energy storage, electric vehicles, and/or time-of-use pricing structures. Grid-interactive efficient building (GEB) An energy-efficient building that uses smart technologies and on-site DERs to provide demand flexibility while co-optimizing for energy cost, grid services, and occupant needs and preferences in a continuous and integrated way. Smart technologies for energy management Advanced controls, sensors, models, and analytics used to manage DERs. GEBs are characterized by their use of these technologies. Generation Services Energy Power plant fuel, operation, maintenance, and startup and shutdown costs Capacity Capital costs for new generating facilities and associated fixed operation and maintenance costs Ancillary Services Contingency Reserves 9 Power plant fuel, operation, maintenance, and opportunity costs associated with providing contingency reserves Frequency Regulation Power plant fuel, operation, maintenance, and opportunity costs 10 associated with providing frequency regulation Ramping Power plant fuel, operation, maintenance, and startup and shutdown costs Delivery Services Non-Wires Alternatives 11 Capital costs for transmission and distribution (T&D) equipment upgrades Voltage Support Capital costs for voltage control equipment (e.g., capacitor banks, transformers, smart inverters)

show abstract

Moisture Control in Buildings: The Key Factor in Mold Prevention—2nd Edition

Cited by 22 publications

References 0 publications

Vapour Diffusion Open Arctic Wall: A Comparison of Moisture Accumulation Potential Versus Other Cellulose Superinsulation Strategies

Vapour Diffusion Open Arctic Wall: A Comparison of Moisture Accumulation Potential Versus Other Cellulose Superinsulation Strategies

Untitled

Grid-interactive Efficient Buildings Technical Report Series: Windows and Opaque Envelope

Contact Info

Product

Resources

About