Use of radon barriers to reach an acceptable radon level

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A method is presented for theoretically estimating the necessary airtightness of a radon barrier. Radon barriers are used to balance the indoor radon concentration. To balance radon at an acceptable level, for a given ventilation rate for indoor air, a barrier must fulfil the requirements for airtightness and the indoor-air radon penetration from the soil, which is determined by the radon concentration in the soil gas. The method identifies the optimal radon barrier for a building. Ten different radon barriers are evaluated. Barriers include system solutions based on materials such as bitumen-based radon blockers, wet-room membranes, reinforced fix mortar pastes, and polyethylene membranes. The barriers are tested using a modified version of the test method NBI 167/02 radon membrane: test of airtightness. The radon barriers are evaluated for a typical building construction for a single-family house with radon exposure from the ground. An acceptable radon concentration of 100 Bq/m3 in indoor air is used in combination with a number of higher radon levels. The different radon barriers are evaluated in accordance with their ability to prevent air penetration from the ground. Furthermore, how mounting a barrier can affect the durability of a building is discussed, as the measures may create a far more vulnerable building.
Original languageEnglish
Title of host publicationWeb of Conferences, Procedings NSB2020
Number of pages7
Publication date7 Sep 2020
Article numberE3S Web of Conferences 1 0 (2020) 72, 5003
ISBN (Electronic)e3sconf/20201720h 0 5 03
Publication statusPublished - 7 Sep 2020
Event12th Nordic Symposium on Building Physics, NSB 2020 - Tallinn, Estonia
Duration: 6 Sep 20209 Sep 2020


Conference12th Nordic Symposium on Building Physics, NSB 2020

Cite this

Rasmussen, T. V., & Cornelius, T. (2020). Use of radon barriers to reach an acceptable radon level. In Web of Conferences, Procedings NSB2020 (Vol. 172). [E3S Web of Conferences 1 0 (2020) 72, 5003 ]