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.
If your chimney is stone and masonry and replacing existing flashing, the costs I have seen are typically around $500 minimum, on up to $1000-1500 range for large multi-flue chimney or one that also needs flashing down the sides of the chimney where the siding butts up against it. How much should it cost to put crown coat on a chimney, Chimney saver application, and flashing repair-seal? 2  Should I let contractor for chimney flashing repair open roof B4 telling me how much decking replacement cost is.