SYMPOSIA PAPER Published: 01 January 2002

Creep Tests and Techniques for Predicting Densities Necessary to Prevent Settling of Loose-fill Insulation in Walls


This paper presents a proposal for a standardized method for creep tests and techniques for predicting densities necessary to prevent settling of loose-fill insulation in walls. Experimental techniques and a theoretical framework needed for determining the associated creep parameters are described.

The theoretical framework allows a quantitative approach to the problem of achieving non-settling of a loose-fill insulation material in a given wall.

The theory leads to a set of equations to estimate stresses in a loose-fill insulation material as a function of the geometry of the wall, material parameters for the loose-fill insulation material and friction coefficients between the wall and the loose-fill. A theoretical description of creep and a technique that allows the determination of the relevant material parameters from the proposed creep tests is shown together with the test results. Furthermore, the necessary loose-fill density for long-term stability in a wall exposed to varying relative humidity is predicted.

Author Information

Rasmussen, TV
Danish Building and Urban Research, Hørsholm, Denmark
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Developed by Committee: C16
Pages: 42–57
DOI: 10.1520/STP11004S
ISBN-EB: 978-0-8031-5469-8
ISBN-13: 978-0-8031-2898-9