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.
The average cost to repoint a chimney is typically around Â£300 for a small chimney with easy access on a low roof. A chimney on the gable end of a semi-detached house is expected to cost Â£800 due to scaffolding costs. Repointing a large chimney stack in the centre of a roof is the most expensive, typically around Â£1200. This average price can vary greatly depending on location, amount of scaffolding, type of chimney, and whether the chimney is at the end or middle of the roof, as well as if it's at eaves or ridge height.