Moisture assessment by fast and non-destructive in-situ measurements

Eva B. Møller, Ernst Jan de Place Hansen, Erik Brandt, Kurt Kielsgaard Hansen

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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Resumé

A building inspection report is made in connection with the resale of 90% of all single-family houses in Denmark. The building inspection is visual with the option of using simple hand-held instruments but with no destructive measures allowed. However, many construction components have a high
moisture content, which is not revealed by this inspection. The moisture content may become a problem for the buyers. This problem might have been avoided if the moisture content of the Building materials was measured on inspection. This is easily done in wood-based materials but for example in
concrete and brick the moisture content is difficult to determine within a short period time. There is political pressure to include moisture measurements in the report if it does not increase the cost of the inspection significantly.

Therefore, a moisture-measuring method is needed that is non-destructive, fast to use, easily applicable and suitable for most porous building materials. Furthermore, the measurements must be reliable at the high end of the hygroscopic area and describe absolute moisture content or corresponding relative humidity. The existing methods for moisture measuring cannot meet these requirements, and those who come close are very expensive. This paper describes a method under development; with simple means and within a few hours, the method can measure the absolute moisture content or the corresponding relative humidity in constructions in a non-destructive way.
The method is based on measurements of the relative humidity of the air in a small hood placed tightly and sealed to the surface of the construction. Results with aerated concrete covered with acrylic paint are presented.
OriginalsprogEngelsk
TitelNSB 2014: 10th Nordic Symposium on Building Physics : Full papers
RedaktørerJesper Arfvidsson, Lars-Erik Haderup, Anders Kumlin, Bitte Rosencrantz
Antal sider8
Udgivelses stedLund, Sweden
ForlagLunds Tekniska Högskola, LTH. Institutionen för Byggnadsteknik
Publikationsdato2014
Sider1124-1131
Artikelnummer140
KapitelMoisture Safety
ISBN (Elektronisk)978-91-88722-53-9
StatusUdgivet - 2014
Begivenhed10th Nordic Symposium on Building Physics - Lund , Sverige
Varighed: 15 jun. 201419 jun. 2014
Konferencens nummer: 10

Konference

Konference10th Nordic Symposium on Building Physics
Nummer10
LandSverige
ByLund
Periode15/06/201419/06/2014

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in situ measurement
moisture content
moisture
relative humidity
inspection
method
air
cost

Citer dette

Møller, E. B., Hansen, E. J. D. P., Brandt, E., & Kielsgaard Hansen, K. (2014). Moisture assessment by fast and non-destructive in-situ measurements. I J. Arfvidsson, L-E. Haderup, A. Kumlin, & B. Rosencrantz (red.), NSB 2014: 10th Nordic Symposium on Building Physics: Full papers (s. 1124-1131). [140] Lund, Sweden: Lunds Tekniska Högskola, LTH. Institutionen för Byggnadsteknik.
Møller, Eva B. ; Hansen, Ernst Jan de Place ; Brandt, Erik ; Kielsgaard Hansen, Kurt. / Moisture assessment by fast and non-destructive in-situ measurements. NSB 2014: 10th Nordic Symposium on Building Physics: Full papers. red. / Jesper Arfvidsson ; Lars-Erik Haderup ; Anders Kumlin ; Bitte Rosencrantz. Lund, Sweden : Lunds Tekniska Högskola, LTH. Institutionen för Byggnadsteknik, 2014. s. 1124-1131
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title = "Moisture assessment by fast and non-destructive in-situ measurements",
abstract = "A building inspection report is made in connection with the resale of 90{\%} of all single-family houses in Denmark. The building inspection is visual with the option of using simple hand-held instruments but with no destructive measures allowed. However, many construction components have a highmoisture content, which is not revealed by this inspection. The moisture content may become a problem for the buyers. This problem might have been avoided if the moisture content of the Building materials was measured on inspection. This is easily done in wood-based materials but for example inconcrete and brick the moisture content is difficult to determine within a short period time. There is political pressure to include moisture measurements in the report if it does not increase the cost of the inspection significantly.Therefore, a moisture-measuring method is needed that is non-destructive, fast to use, easily applicable and suitable for most porous building materials. Furthermore, the measurements must be reliable at the high end of the hygroscopic area and describe absolute moisture content or corresponding relative humidity. The existing methods for moisture measuring cannot meet these requirements, and those who come close are very expensive. This paper describes a method under development; with simple means and within a few hours, the method can measure the absolute moisture content or the corresponding relative humidity in constructions in a non-destructive way.The method is based on measurements of the relative humidity of the air in a small hood placed tightly and sealed to the surface of the construction. Results with aerated concrete covered with acrylic paint are presented.",
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Møller, EB, Hansen, EJDP, Brandt, E & Kielsgaard Hansen, K 2014, Moisture assessment by fast and non-destructive in-situ measurements. i J Arfvidsson, L-E Haderup, A Kumlin & B Rosencrantz (red), NSB 2014: 10th Nordic Symposium on Building Physics: Full papers., 140, Lunds Tekniska Högskola, LTH. Institutionen för Byggnadsteknik, Lund, Sweden, s. 1124-1131, Lund , Sverige, 15/06/2014.

Moisture assessment by fast and non-destructive in-situ measurements. / Møller, Eva B.; Hansen, Ernst Jan de Place; Brandt, Erik; Kielsgaard Hansen, Kurt.

NSB 2014: 10th Nordic Symposium on Building Physics: Full papers. red. / Jesper Arfvidsson; Lars-Erik Haderup; Anders Kumlin; Bitte Rosencrantz. Lund, Sweden : Lunds Tekniska Högskola, LTH. Institutionen för Byggnadsteknik, 2014. s. 1124-1131 140.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

T1 - Moisture assessment by fast and non-destructive in-situ measurements

AU - Møller, Eva B.

AU - Hansen, Ernst Jan de Place

AU - Brandt, Erik

AU - Kielsgaard Hansen, Kurt

PY - 2014

Y1 - 2014

N2 - A building inspection report is made in connection with the resale of 90% of all single-family houses in Denmark. The building inspection is visual with the option of using simple hand-held instruments but with no destructive measures allowed. However, many construction components have a highmoisture content, which is not revealed by this inspection. The moisture content may become a problem for the buyers. This problem might have been avoided if the moisture content of the Building materials was measured on inspection. This is easily done in wood-based materials but for example inconcrete and brick the moisture content is difficult to determine within a short period time. There is political pressure to include moisture measurements in the report if it does not increase the cost of the inspection significantly.Therefore, a moisture-measuring method is needed that is non-destructive, fast to use, easily applicable and suitable for most porous building materials. Furthermore, the measurements must be reliable at the high end of the hygroscopic area and describe absolute moisture content or corresponding relative humidity. The existing methods for moisture measuring cannot meet these requirements, and those who come close are very expensive. This paper describes a method under development; with simple means and within a few hours, the method can measure the absolute moisture content or the corresponding relative humidity in constructions in a non-destructive way.The method is based on measurements of the relative humidity of the air in a small hood placed tightly and sealed to the surface of the construction. Results with aerated concrete covered with acrylic paint are presented.

AB - A building inspection report is made in connection with the resale of 90% of all single-family houses in Denmark. The building inspection is visual with the option of using simple hand-held instruments but with no destructive measures allowed. However, many construction components have a highmoisture content, which is not revealed by this inspection. The moisture content may become a problem for the buyers. This problem might have been avoided if the moisture content of the Building materials was measured on inspection. This is easily done in wood-based materials but for example inconcrete and brick the moisture content is difficult to determine within a short period time. There is political pressure to include moisture measurements in the report if it does not increase the cost of the inspection significantly.Therefore, a moisture-measuring method is needed that is non-destructive, fast to use, easily applicable and suitable for most porous building materials. Furthermore, the measurements must be reliable at the high end of the hygroscopic area and describe absolute moisture content or corresponding relative humidity. The existing methods for moisture measuring cannot meet these requirements, and those who come close are very expensive. This paper describes a method under development; with simple means and within a few hours, the method can measure the absolute moisture content or the corresponding relative humidity in constructions in a non-destructive way.The method is based on measurements of the relative humidity of the air in a small hood placed tightly and sealed to the surface of the construction. Results with aerated concrete covered with acrylic paint are presented.

M3 - Article in proceeding

SP - 1124

EP - 1131

BT - NSB 2014: 10th Nordic Symposium on Building Physics

A2 - Arfvidsson, Jesper

A2 - Haderup, Lars-Erik

A2 - Kumlin, Anders

A2 - Rosencrantz, Bitte

PB - Lunds Tekniska Högskola, LTH. Institutionen för Byggnadsteknik

CY - Lund, Sweden

ER -

Møller EB, Hansen EJDP, Brandt E, Kielsgaard Hansen K. Moisture assessment by fast and non-destructive in-situ measurements. I Arfvidsson J, Haderup L-E, Kumlin A, Rosencrantz B, red., NSB 2014: 10th Nordic Symposium on Building Physics: Full papers. Lund, Sweden: Lunds Tekniska Högskola, LTH. Institutionen för Byggnadsteknik. 2014. s. 1124-1131. 140