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ASTM Selected Technical Papers
Insulation Materials, Testing and Applications
DL McElroy
DL McElroy
Oak Ridge National Laboratory
Oak Ridge, Tennessee
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JF Kimpflen
JF Kimpflen
Certain-Teed Corporation
Valley Forge, Pennsylvania
symposium co-chairman and editor
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ASTM International
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Blown loose-fill thermal insulation was introduced to Sweden in the late 1970s and has become more common since then. Today loose-fill insulation is used especially for attics, both as insulation in new building production and as additional insulation in older buildings. Loose-fill insulation is mainly manufactured from mineral wool and cellulosic materials.

As users of loose-fill thermal insulation know, this insulation type can settle, which means that it will compress. It is of great importance to know the long-term behavior of the insulation thickness, so as to be able to estimate the insulation capacity during the lifetime of the structure.

This paper reviews a field study of settling in loose-fill thermal insulation performed by the National Swedish Institute for Building Research. The study is confined to the use of loose-fill insulation for horizontal structures and formed part of a wider project in which a laboratory study also was performed.

In the field study both mineral wool and cellulosic loose-fill materials were investigated. The loose-fill materials were blown on several test attics, and settling was measured during one year within the project. The paper presents results of settling after three years in practice.

, “
Settling of Loose-Fill Thermal Insulation
,” Bulletin M85:31,
National Swedish Institute for Building Research
Gävle, Sweden
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