Interserve said the closures were expected to lead to an exceptional charge in the second half of the year of £14m, of which £11m relates to the closures and £3m to the trading losses. A net inflow of £10m is now anticipated as assets are sold and debts collected from within these businesses.
The announcement came in a trading statement that said the firm was otherwise performing in line with expectations, and had £3.6bn in its forward order book.
Chairman Mike Bottjer said: "We continue to strengthen the long-term earnings platform and growth potential for the business with the proposed actions today."
Interserve announced the appointment of two non-executive directors. These are David Trapnell, currently a non-executive director with The Royal Mint, and Nicholas Keegan, finance director of events firm Evenser Group.