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.
Baumgardt Home Inspections, located in Wisconsin, said the average chimney flashing job could be in the $200 to $500 range, depending on the type of chimney you have. For example, a sloped asphalt could cost $200 to $400, while a flat built-up could be in the $300 to $500 range.