Prediction of Long-Term Density of Cellulose Fibre Insulation in Horizontal Spaces of New Residential Houses

Abstract

Owing to the variability of loose-fill materials and installation param eters, both density and the structure of these materials may vary from place to place in the same attic space as well as from house to house. These variations may affect the settlement of the materials Previous studies on the settlement of cellulose fibre in sulations (CFI), most performed in the laboratories, did not include the effects of variability in the installation techmques This paper, reporting results of the field study, analyses both the material settlement and the effect of variation in installed density on the CFI settlement.

A method for predicting long-term density of CFI is postulated as the conclusion of this field study.

Keywords

cellulose fibre insulation loose-fill insulation applied density field density settlement of loose-fill insulation.

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References

Bomberg, M. and C.J. Shirtliffe . "Blown Cellulose Fiber Thermal Insulations, Part 1—Density of CFI in Horizontal Applications" ASTM STP 660, pp 82-103, reprint NRCC 17139 available from IRC/NRCC (1978).

Bomberg, M. and C.J. Shirtliffe .

"Comments on Standardization of Density and Thermal Resistance Testing of Cellulose Fibre Insulation for Horizontal Applications," Building Research Note 147

available from Institute for Research in Construction, NRCC (May, 1979).

Spinney, S.C. , R.P. Tye and J.L. Weidt. "A Study of Some In-Situ Properties of Cellulose and Urea Formaldehyde Retrofit Insulations," ASHRAE Tran Vol 85, Part 2, DE-79-3 (1979)

Flanders, S.N. "Measured Insulation Improvement Potential for Ten U S Army Buildings," ASTM STP 922, pp 202-220 (1987)

Svennerstedt, B. "Settlement of Loose-Fill Thermal Insulation ," in Swedish Med., M85:31, The National Swedish Institute for Building Research (1985)

Yarbrough, D.W. , R.S. Graves and D.L. McElroy "Thickness and Density Measurements for Attic Loose-Fill Thermal Insulation in Eight Cities," ORNL/TM-10414

Canadian General Standards Board—Standard for Thermal Insulation Cellulose Fiber, Loose Fill, 51-GP-60M (April, 1979)