Long-term on-site assessment of hygrothermal performance of interior thermal insulation system without water vapour barrier

Toman, J.; Vimmrová, Alena; Černý, Robert

doi:10.1016/j.enbuild.2008.07.007

Cited by 69 publications

(49 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They observed no liquid moisture and low RH in the insulation which they attributed to its active water transport. In agreement, in-situ testing of the same insulation showed no water condensation within the wall Toman et al (2009). Therefore, capillary active systems seem more appropriate than vapour tight systems for facades sensitive to damage by moisture accumulation.…”

Section: Methods Of Internal Insulation: Dealing With Moisture When Isupporting

confidence: 72%

Propiedades térmicas e hídricas de materiales aislantes apropiadas para fábricas históricas = Thermal and hygric properties of insulation materials suitable for historic fabrics

Walker

Pavía

2016

ADE

View full text Add to dashboard Cite

ResumenMejorar el rendimiento térmico de los edificios mediante la adaptación del aislamiento puede reducir la pérdida innecesaria de calor y energía minimizando el impacto ambiental. El aislamiento térmico interior es a menudo el elegido en los edificios históricos para preservar sus características. Sin embargo, el aislamiento interior puede aumentar la acumulación de humedad en paredes que socavan su durabilidad. Hay una falta de conocimiento sobre la eficacia de sólidos muros históricos y el impacto del aislamiento interno en su comportamiento higrotérmico. Este artículo investiga las propiedades térmicas e hídricas de siete opciones de aislamiento internos, incluyendo la pintura térmica, aerogel (AG), corcho-cal (CL), cal-cáñamo (HL), silicato de calcio bordo (CSB), tablero de fibra de madera (TFB) y placa de polisocianurato (PIR). Sus propiedades se comparan con un enlucido de cal tradicional. El PIR y el aerogel AG muestran extraordinarias propiedades térmicas que contribuyen a la comodidad y ahorro de energía, y la CL y HL son permeables al vapor y a la capilaridad. Estos tienen aproximadamente el doble de la masa térmica de los otros aislantes. Además, la CL tiene una buena inercia térmica (segunda difusividad más baja) y, a pesar de su contenido orgánico, una adsorción de baja a alta RH.AbstractImproving the thermal performance of buildings by retrofitting insulation can reduce unnecessary heat loss and building operational energy minimising environmental impact. Internal thermal insulation is often favoured for historic buildings to preserve their features. However, internal insulation may increase moisture accumulation in walls undermining their durability. There is a lack of knowledge on the performance of historic solid walls and the impact of internal insulation in their hygrothermal behaviour. This paper investigates the thermal and hygric properties of seven internal insulation options including thermal paint, aerogel (AG), cork lime (CL), hemp lime (HL), calcium silicate board (CSB), timber fibre board (TFB) and polyisocyanurate (PIR) board. Their properties are compared with a traditional lime plaster. The PIR and aerogel AG show outstanding thermal properties that contribute towards indoor thermal comfort and energy savings and the CL and HL are vapour permeable and capillary active. They have approximately double the thermal mass of the other insulations. In addition, the CL has a good thermal inertia (2nd lowest diffusivity) and, in spite of its organic content, a low adsorption at high RH.

show abstract

Section: Methods Of Internal Insulation: Dealing With Moisture When Isupporting

confidence: 72%

Propiedades térmicas e hídricas de materiales aislantes apropiadas para fábricas históricas = Thermal and hygric properties of insulation materials suitable for historic fabrics

Walker

Pavía

2016

ADE

View full text Add to dashboard Cite

show abstract

“…The moisture conditions in the insulation did not create any risk of mould growth. An insitu study [16] of application of vapour open mineral wool internal insulation on solid brick walls showed that there was no deterioration in the hygrothermal performance of mineral wool insulation. Walker and Pavia [17] investigated the in situ thermal performance of thermal paint, aerogel, cork lime, hemp lime, calcium silicate board, timber fibre board and PIR board on a historic brick wall.…”

Section: Introductionmentioning

confidence: 99%

Quasi steady state and dynamic hygrothermal performance of fibrous Hemp and Stone Wool insulations: Two innovative laboratory based investigations

Latif

Tucker

Ciupala

et al. 2016

Building and Environment

View full text Add to dashboard Cite

Moisture and heat management properties of Hemp and Stone Wool insulations were studied by mounting them between a hot and a cold climate chamber. Both insulations were exposed to identical hygrothermal boundary conditions. Quasi steady state and dynamic tests were carried out at a range of relative humidity exposures. The likelihood of interstitial condensation was assessed and equivalent thermal conductivity values of the insulations were determined. The adsorption-desorption isotherms of the insulations were also determined in a dynamic vapour sorption (DVS) instrument. It was observed that the likelihood of condensation was higher in Stone Wool insulation than in Hemp insulation. Hemp insulation performed better in managing moisture due to its high hygric inertia and water absorption capacity. It was observed that the equivalent thermal conductivity of Stone Wool insulation was dependent on enthalpy flow and phase change of moisture. The equivalent thermal conductivity of Hemp insulation was close to its declared thermal conductivity in dynamic conditions when high relative humidity exposures were transient. In quasi steady state boundary conditions, when the insulation was allowed to reach the equilibrium moisture content at ranges of relative humidity, there was a moisture dependent increase of thermal conductivity in Hemp insulation.

show abstract

“…Previous research has focused on how to install interior insulation in old masonry constructions [6,[16][17][18][19], but it did not clarify the degree to which thermal bridges, such as floor structure and geometry around windows, would influence the resulting efficiency of the interior insulation. Thermal bridges do not influence the construction when it is considered from a 1-dimensional point of view, but will have an increasing influence when 2-and 3-dimensional aspects are taken into account.…”

Section: Introductionmentioning

confidence: 99%

Interior insulation—Characterisation of the historic, solid masonry building segment and analysis of the heat saving potential by 1d, 2d, and 3d simulation

Odgaard

Bjarløv

Rode

2018

Energy and Buildings

View full text Add to dashboard Cite

 Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

show abstract

Long-term on-site assessment of hygrothermal performance of interior thermal insulation system without water vapour barrier

Cited by 69 publications

References 11 publications

Propiedades térmicas e hídricas de materiales aislantes apropiadas para fábricas históricas = Thermal and hygric properties of insulation materials suitable for historic fabrics

Propiedades térmicas e hídricas de materiales aislantes apropiadas para fábricas históricas = Thermal and hygric properties of insulation materials suitable for historic fabrics

Quasi steady state and dynamic hygrothermal performance of fibrous Hemp and Stone Wool insulations: Two innovative laboratory based investigations

Interior insulation—Characterisation of the historic, solid masonry building segment and analysis of the heat saving potential by 1d, 2d, and 3d simulation

Contact Info

Product

Resources

About