Air Permeation Rate of Oriented Strand Boards (OSB/3 and OSB/4)

Hodoušek, Matěj; Böhm, Martin; Lemaster, Richard L.; Bureš, Miroslav; Beránková, Jitka; Cvach, Jiří

doi:10.15376/biores.10.1.1137-1148

Cited by 5 publications

(7 citation statements)

References 3 publications

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“…The air permeability of the 13…15 mm thick OSB board used in the walls and roof might be too high. Other researchers have linked the air permeability of OSB boards to their thickness and manufacturing technology [28], [29].…”

Section: Air Leakage Test and Leak Detectionmentioning

confidence: 99%

Factors affecting the deep renovation of a single-family building – a case study

et al. 2021

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The Energy Performance of Buildings Directive (EPBD) of the EU states that Each Member State shall establish a long-term renovation strategy to support the renovation of building stock into a highly energy efficient and decarbonised building stock by 2050. The motive for the study was the dissatisfaction of inhabitants of a single-family building about the heating costs and thermal discomfort. In this study both the emotional and resource efficiency aspects were considered. The structures and technical systems of the studied small dwelling are typical of representing single-family buildings of the Estonian building stock. The initial purpose was to improve the energy efficiency of a building while preserving the existing load bearing structures as much as possible. The research questions were: 1) what the situation before the renovation was, 2) what solutions can be used, 3) making decisions, whether to renovate or demolish. Calculations were carried out – the thermal transmittance of the envelope structures was calculated based on the construction information, and the linear thermal transmittance of geometrical thermal bridges was calculated by using the software Therm. Field tests performed - the thermography and the air leakage of the building was found by standard blower-door test. Specific air leakage rate qE50=11.1 m3/(hm2) was estimated. A renovation solution was offered considering the need for extra insulation and airtightness. The dwelling energy performance indicator was reduced from the existing 279 kWh/(m2y) to 136 kWh/(m2y). For significant energy efficiency improvement deep renovation measures must be used and the question was whether it is rational. Before making the final decision, several aspects have to be considered: 1) emotional – the demolition or renovation of somebody’s home, 2) environmental aspects and resource-efficiency – the possibilities of the reuse of materials.

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Section: Air Leakage Test and Leak Detectionmentioning

confidence: 99%

Factors affecting the deep renovation of a single-family building – a case study

et al. 2021

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“…Properties of the resins used are presented in Table 1. Other properties of the resin used for OSB/4 and PU1 have been described previously (Hodoušek et al, 2015).…”

Section: Production Of Osb/3 and Osb/4 Panels 21 Proizvodnja Ploča mentioning

confidence: 99%

“…Oriented strand board (OSB) is an engineered wood-based panel consisting of strands of wood that are bonded together with a synthetic resin; the strands are oriented, partially randomly overlapped, and pressed together in layers (Hodoušek et al, 2015). In the outer layers, strands are generally oriented longitudinally in line with the panel length, whereas in the middle layers, strands generally lie perpendicular to the outer layers.…”

mentioning

confidence: 99%

“…OSB consists of three layers, and it achieves a high level of dimensional stability with excellent mechanical performance. OSB is manufactured primarily from spruce strands, good quality softwood Hodoušek et al, 2015).…”

mentioning

confidence: 99%

“…Formaldehyde emissions (FE) from wood, wood products, and fl ooring materials are affected by wood type or species, board thickness, resin type, resin additives, panel manufacturing techniques, moisture content, the drying and hot-pressing techniques, and surface fi nishing materials (Yu and Crump, 1999 Previously, differences in the bending stress of the upper and lower faces of OSB/3boards and the air permeation rate of OSB/3 and OSB/4 boards have been studied (Ohlmeyer et al, 2008;Hodoušek et al, 2015). In the present study, OSB/3 and 4 boards, which are extensively produced in Europe for their use as heavy-duty load-bearing boards in humid conditions, were evaluated to determine their formaldehyde content with the perforator or extraction method (EN 120, 1993).…”

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Measuring the Formaldehyde Content from Different Types of Oriented Strand Board Manufactured with Different Thicknesses and Glued with Different Resins

2017

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This study measures the formaldehyde content (FC) of different types of oriented strand board (OSB) panels. Panels with different thicknesses were produced on the OSB production line of a prominent manufacturer of board composite materials in the Czech Republic. The resins used were polyurethane (PU1, PU2) and melamine-urea-formaldehyde (MUF). The corrected FC from 3-layer OSB/3 panels (MUF/surface, PU2/core) ranged from 5.95 ± 0.42 to 7.24 ± 0.67 mg formaldehyde/100 g of dry board. The corrected FC of the 3-layer OSB panels bonded with PU2 resin ranged between 0.48±0.04 and 0.57±0.11 mg formaldehyde/100 g dry board. Additionally, the corrected FC of 3-layer OSB/3 panels bonded with PU1 resin ranged from 0.09±0.22 to 0.46±0.40 mg formaldehyde/100 g dry board. Furthermore, the corrected FC of 3-layer OSB/4 panels bonded with PU1 resin ranged from 0.178±0.309 to 0.473±0.027 mg formaldehyde/100 g dry board. These results showed that the FC was limited to the natural content of formaldehyde in solid wood, where the values are extremely low, and which resulted in the production of green product. Additionally, the FC of OSB panels bonded with PU1 was lower than that of panels glued with PU2. SAŽETAK • U istraživanju je provedeno mjerenje sadržaja formaldehida u različitim tipovima ploča s orijentiranim iverjem (OSB). Ploče različitih debljina izrađene su na proizvodnoj liniji poznatog proizvođača pločastih 1 Authors are visitor researcher and assistant professor at Department of Wood Processing, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Prague, Czech Republic. 2 Authors are associate professor and professor at Forestry and Wood Technology Department, Faculty of Agriculture (EL-Shatby), Alexandria University, Egypt. 1 Autori su gostujući istraživač i docent Odjela za preradu drva, Fakultet šumarstva i drvne tehnologije, Češko sveučilište prirodnih znanosti, Prag, Republika Češka. 2 Autori su izvanredni profesor i profesor Odjela šumarstva i drvne tehnologije, Agronomski fakultet (EL-Shatby), Sveučilište u Aleksandriji, Egipat.

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Effect of moisture content on the air permeability of oriented strand boards

Hodoušek

Böhm

Souckova

et al. 2018

BioRes

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Changes in the air permeability and density profiles of 12-mm-thick oriented strand board (OSB) specimens were evaluated in relation to changes in their moisture content. The test methodology consisted of the simulation of real conditions that may occur during construction. Using a water bath, the OSB moisture content was increased from 10% to 17%, and the consequent changes in the air permeability and vertical density profile (VDP) were analyzed. The air permeability and VDP were then reanalyzed after acclimatization of the OSB to a balanced moisture content at 60% relative air humidity and 11.4 °C. After wetting the boards with an initial moisture content of 10% for 2 h and naturally re-drying them in laboratory conditions, an average increase of 11.7% in air permeability was observed. The increase in air permeability was 5.6% with a pressure difference of 50 Pa. After redrying, the boards showed a 1.1% lower average density and 14.5% lower maximum density in the surface layers. From the results, it followed that even the short-term effects of water and the related increase in moisture content of the OSB had a negative impact on the air permeability and VDP.

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Air Permeation Rate of Oriented Strand Boards (OSB/3 and OSB/4)

Cited by 5 publications

References 3 publications

Factors affecting the deep renovation of a single-family building – a case study

Factors affecting the deep renovation of a single-family building – a case study

Measuring the Formaldehyde Content from Different Types of Oriented Strand Board Manufactured with Different Thicknesses and Glued with Different Resins

Effect of moisture content on the air permeability of oriented strand boards

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