roof insulated with sandwich panels and covered with winter frost

roof insulated sandwich panel cornice border winter frost vertical ice blue sky pitchedroof polyisocyanurate pir sidelap mineral wool metal sheets steel assembled aluminum foam climate cold system closeup exterior building rooftop temperature joints technology equipment top thermal architecture domestic early morning low freezing point sunny construction material protective cover houses outer profile insulating core properties fibrous fiber glued prepainted surface layers coating options panels covered frost background