When fire ripped through the art school on 15 June 2018 the rain shield of the Reid Building sustained heat damage, and will need to be replaced the school has revealed.
A spokesperson for the Glasgow School of Art told Dezeen that the damaged rain shield would be removed at the same time as the stabilisation work that is being undertaken on the Mackintosh Building.
Part of the school has already been dismantled after there were concerns that the fire-damaged walls could suddenly collapse.
Holl completed the geometric building, which has a distinctive green matte glass facade, in 2014. The extension to the school, which proved controversial at the time, was designed to contrast to the sandstone frontage of the Mackintosh Building across the road.
The Reid Building's interior did not sustain any damage during the fire, and the rain shield is not integral to the day-to-day function of the building. Replacement panels are due to be fitted around the academic needs of the building.
"JM Architects, our associate architect for the Reid Building, has been monitoring the situation with the school, and is ready to assist with the assessment and restoration of the Reid Building facade," said a representative for Steven Holl Architects.
"Steven Holl Architects will work with JM Architects and the school as needed."
The Mackintosh building was almost destroyed as it was nearing the end of a refurbishment process following a smaller fire in 2014. It is estimated that a second restoration would cost up to £100 million.
For weeks there was speculation and debate over whether the art school would be rebuilt according to Mackintosh's designs or demolished and something new built in its place. David Chipperfield was one of several high profile architects who gave their support to the campaign to maintain the Mackintosh.
Last month Tom Inns, the director of the Glasgow School of Art, announced that the building would be rebuilt as a functioning art school.
Photography is by Paul Riddle, unless stated.