Hackney Council is next month due to receive results of a second investigation into what caused tiles to crumble and fall off at London Fields Lido.
Sandberg, a specialist building investigation company, was sent samples of screed and other materials removed from the pool tank to test in its lab in June.
But a delayed report that was finally issued in October proved inconclusive, and the town hall had to send back additional samples for testing.
A second and final report is expected back in February. Its results could help determine who is responsible for the £1.5m repair works to the pool, which began in April and overran by six months.
The pool’s original refurb in 2008 cost £3m. It was carried out by R Durtnell and Sons Ltd, who employed several sub-contractors to carry out specialist work.
A spokesman for the council said: “We need to try and establish what has caused the tile failure before we consider whether there is any blame to apportion or compensation to be claimed.”
The council looks set for a separate battle with the latest contractor over the late completion of the works, originally expected to be finished by early summer.
A spokesman for the council said bosses are currently discussing their “contractual position” with Etec Contract Services Ltd.
“It would therefore not be appropriate to comment further until these discussions have been concluded,” he added.
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