The architectural screening, solar shading and balconies business is now due to run up a bigger loss than anticipated hitting group profits.
Alumasc said: “Levolux has continued to experience construction project delays both before and after the placement of customer orders, and margins remain below expectations in the embryonic balconies business.
“In response to this, the Board has moved to change and restructure the Levolux management team in recent months and is already working with the new team on operational improvements to restore profit as soon as possible, together with a strategy to maximise value.”
Alumasc said the Levolux losses would mean underlying pre-tax profits will now come in 10-15% below previous expectations.
The firm added: “The Roofing & Water Management and Housebuilding & Ancillaries divisions, together representing approximately 80% of Group revenues, are both continuing to grow well ahead of the UK construction market and are expected to deliver very encouraging overall year-on-year revenue growth.
“We have addressed the margin issues experienced in the first half year in the Gatic brand and this is already leading to a much improved second half performance.”