A large percentage of modern fireplaces are referred to as zero clearance or factory built fireplaces. Most of these modern fireplaces have a metal chimney which terminates at the top through a metal chase cover on the top of the wooden chase built to hold the fireplace and its’ chimney. It is quite common for this metal to start to rust after about twelve years. S.K. Evans Home and Building Services has replaced over 70 of these chase covers with Lifetime warrantied stainless steel chase cover.