The effectiveness of cone calorimeter was evaluated in measuring post-ignit
ion parameters of polyurethane rigid foams for building insulation. The app
aratus allowed to sufficiently screen the fire behaviour of different sampl
es in spite of both the reduced dimensions of specimens and the low density
of the material. The patio between parameter peak values and relative time
appears more meaningful than the sole peak value. (C) 1999 Elsevier Scienc
e Ltd. All rights reserved.