Local police believe a van was used in a theft from partially completed houses.
Items were taken from a building site in New Road, Forfar, between 3.30pm on Friday and 7am on Saturday.
A police statement said: “The site was entered by unknown persons, and materials were stolen from the site, notably from some of the partially completed houses.
“This would have been heavy and probably required the use of a vehicle, most likely a van of some kind.
“If you have any information which could assist our investigation, please call 101 or speak with any police officer.
“Also, information can be given anonymously through Crime Stoppers on 0800 555 111. Our reference is CR/11622/18.”