If the coil is located on the back of the zipper instead of the front it is an Invisible Zipper. Metal zippers consist of individual metal teeth. They are typically made from nickel, brass, aluminum and manganese.
Cost of Repair. The cost to re-line a chimney can be very expensive! Repair costs generally range from about $2000.00 to $4500.00 per flue or more! In a Real Estate transaction, you may have the opportunity to negotiate defects that are disclosed as part of the inspection process.
1 Chimney repairs (not rebuilding) cost $750 to $1,500 or more. 2  Repairs performed above 10 feet cost more than those performed below 10 feet. Expect to pay at least 10 to 20 percent extra for repairs at height.  Brick prices vary based on the type of brick and the quantity ordered.