Merton Council has decided to close Christchurch Road to traffic following an incident where a windowpane fell from a skyscraper.
A video circulating on social media shows the glass falling from the 12th floor of Britannia Point on Monday.
Locals have since discovered more cracked windows in other areas of the building.
One set of cracks sits opposite the Singlegate Primary School, on Christchurch Road.
Merton Council has decided to close the street to traffic, but access to Singlegate Primary School and nearby shops will still be available.
It is advised that parents and children use Valley Gardens as an alternative safe route.
Another set of cracks has also been spotted on the building facing Colliers Wood High Street.
Tomorrow a full assessment of each pane of glass will take place, with workers examining the glass by abseiling.
A structural and fire assessment of the tower has been also carried out today.
A statement from Merton Council reads: “Following discussions today with the fire service, police, the council and the building’s management company, we will be taking further immediate precautions to ensure the safety of residents in and around Colliers Wood Tower.
“A structural and fire assessment of the tower is being carried out today, and a full window-by-window abseil of the building will take place tomorrow morning to check each pane of glass.
“However, until we are satisfied with the results of those surveys, we will be widening the cordon around the building as a precaution.
“This will mean the closure of Christchurch Road to traffic.
“Access to Singlegate Primary School will be maintained, although residents are advised to use Valley Gardens as an alternative safe route.
“The shops on Christchurch Road and the Underground station will remain accessible.
“Following today’s survey, we will be meeting again with partners later this evening and will update you again as necessary.
“We would like to thank residents for their patience while we work to ensure everybody is kept safe.
In 2009 before the renovation of the building, the ground and first floors windows and doors had been boarded up and netting attached to prevent falling debris, which caused injury to passers-by.
A major refurbishment of the tower began in 2014 and finished in November 2017 when it was redesigned with a glass curtain around the building.
Criterion Capital, Britannia Points owners, were contacted for comment.
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