The invention relates to a coating for insulation material, which coating comprises a metal layer, such as an aluminum layer, and a plastic layer. The plastic layer contains plastic that crystallizes when heated. The plastic can more particularly be a polyamide.
This application is a division of prior application No. 10/081,133, filed on Feb. 22, 2002, which is a continuation of International Application No. PCT/FI00/00716, filed Aug. 24, 2000 and designating the United States of America, which are hereby incorporated herein by reference in their entirety.
