What would be a reasonable number of reuses of plastic or elastomeric form liners to figure in estimating a four-story school job?
It depends both on the kind of liner and how well you are able to handle, clean and store the liners. It would be best to consult the manufacturer. One form liner manufacturer says that its plastic form liner is usually designed for 6 to 10 reuses. The same manufacturer produces an elastomeric form liner designed for 200 to 300 reuses. Undoubtedly there are other materials available that produce somewhat different ranges.