Due to the roads were icy, the school was closed.
Because the roads were icy, the school was closed.
Due to the fact that the roads were icy, the school was closed.
Due to the icy roads, the school was closed.
Use due to + noun or noun phrase: ‘The flight was cancelled due to bad weather.’
Use because + subject + verb: ‘The flight was cancelled because the weather was bad.’
We can also use due to the fact that + subject + verb: ‘The flight was cancelled due to the fact that the weather was bad.’ This structure is common in formal English, but because is shorter and more natural in everyday English.
Due to means ‘because of’.
See BECAUSE