Police suspect a team of thieves planned the theft of £6,000 of roofing felt from an industrial estate.
150 rolls were stolen from a site in St Joseph's Close in Hove between New Year's Day and Friday January 10.
Police believe that as many as six people may have been involved in the heist because of the quantity of material taken.
Anyone with information should call Sussex Police on 101 or email firstname.lastname@example.org quoting serial 986 of 13/01.
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