The theft is thought to have occurred between 15:00 on Thursday 17 June and 07:00 on Friday 18 June.
Officers say they are particularly interested in speaking to any residents in the area who noticed any commercial vehicle movement in the early hours of the Friday morning.
The covid pandemic stalled production at millions of factories worldwide, including those that supply Guernsey’s construction industry, leading to delays in deliveries of roofing batten of up to four or five months.
Anyone with information is asked to contact PC 138 Falla on 222 222 or to contact CrimeStoppers anonymously on 0800 555 111.