Temperature extremes may have caused more than a dozen splits in 26 glass roof panels at the £16m National Glass Centre in Sunderland, according to experts.
Initial investigations by design experts from engineer Ove Arup suggest that the damage may have been caused by the toughened glass expanding in the sun and contracting at night.
The panels were made by Kvaerner Construction of Darlington.
A spokesman for the building’s owner, the Commission for the New Towns, said an engineer’s report was being awaited. `The building has a unique design and our consultant engineers believe the cracks may be due to impact from outside sources.’
But he acknowledged the possibility that the cracks were due to weather temperature changes.