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 Custom fit chimney reliners can cost anywhere from $2,000 to $3,000. 2  For those that want to do the job themselves, chimney liners can cost anywhere from $80 to $500 depending on the length and brand. 3  For example, the 25 foot Simpson DuraFlex retails for $265 to $310.