Welding methods with reduced fire hazard for single‐ply polymer‐modified bituminous roofing materials

The practice for roof membranes for flat and lowslope roofs has substantially developed during the last two decades of the twentieth century. New technical solutions have been introduced and building codes and guidelines have been changed.The development of technical solutions preceded the scientific work. However, the scientific work did help to develop the technical practice for enhanced performance. The development described in this paper has much in common with recently published EOTAguidelines regarding "Assessment of service life". La pratique des membranes d'&anch&( pour les toits plats ou a faible pente s'est consid&ablement d&elopp& durant les deux derni}res d&ennies du vingti~me si&le. Cette tendance est li& a l'apparition de nouvelles solutions techniques et au d&eloppement des normes et des directives concernant leur raise en oeuvre.En r&lit(, ces solutions techniques sont n&s de la pratique. Le traw~il scientifique n'est apparu que plus tard mais a n&nmoins contribu~ a l'am~lioration des pe~rmances de ces solutions. Le d&eloppement d&rit dans cet article a de nombreux points communs avec les directives EOTA r&emment publi&s concernant ,, l'&aluation de la dur& de vie ,~.

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“…[7]. Contractors, insurance companies and producers of welding equipment became engaged in work aimed to decrease fire hazards.…”

Section: Fire Hazardsmentioning

confidence: 99%

Roof membranes—The Swedish practice in light of EOTA TB 97/24/9.3.1 PT3 Durability

Björk

Gränne

2000

Mat. Struct.

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“…This work will focus on another hot air welding technique, the overlap welding, as it is a common method for welding rooftop sheets. For this method a rooftop sheet is placed on top of another sheet with only a certain part overlapping and then a hot air fan, followed by a pressure roll is lead through the overlap (Oba et al, 1994). The surfaces of the sheets are melted and the pressure of the roll bonds them together.…”

Section: Introductionmentioning

confidence: 99%

Proceedings - 5th International Conference Business Meets Technology 2023

Scientific Committee

2023

Libro De Actas.

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The 5th edition of this International Conference will take place on July 13th until 15th, 2023 in Valencia.in the Business Organization Department with the support of the Faculty of Business Administration and Management of the Universitat Politècnica de València (UPV), Spain.The first and second edition of the Conference were held at the University of Applied Sciences of Ansbach, Germany, in 2018 and 2020, respectively.

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Section: Introductionmentioning

confidence: 99%

Influence of storage conditions of PVC rooftop sheets on the hot air welding process

Michalak,

Sover

2023

Libro De Actas.

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One of the common welding methods for polymer rooftop sheets is the overlap welding by hot air. For this method two rooftop sheets are put over each other with a certain overlapping part and then a hot air fan, followed by a pressure role is lead through the overlap. The surfaces of the sheets are melted and the pressure of the role bonds them together. This welding method depends on some different parameters to achieve a good welding quality. The main parameters are the welding temperature, the welding speed and the pressure applied to the rooftop sheets. However, as the sheets are used to cover roofs outside, there are a lot of other influences on the weldability of the sheets and the quality of the weld itself. For example, the ambient temperature during the welding process, the intensity of the sun or the humidity of the air. Another influence on which this work is focused, is the effect of the storage temperatures of rooftop sheets. There is no common guideline how storing temperatures effect the welding as producers of rooftop sheets usually only recommend a dry storage. To analyze and characterize this effect, a common PVC rooftop sheet is stored under different temperatures and welded directly after the temperature treatment. The welded samples are tested according to the DIN EN 12317-2 to determine the shear resistance of the weld as it is an important mechanical property and a good indicator for the quality of the weld.

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Welding methods with reduced fire hazard for single‐ply polymer‐modified bituminous roofing materials

Cited by 8 publications

References 9 publications

Roof membranes—The Swedish practice in light of EOTA TB 97/24/9.3.1 PT3 Durability

Roof membranes—The Swedish practice in light of EOTA TB 97/24/9.3.1 PT3 Durability

Proceedings - 5th International Conference Business Meets Technology 2023

Influence of storage conditions of PVC rooftop sheets on the hot air welding process

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