Husky Energy is delaying the installation of the concrete gravity structure under construction at the Argentia shipyard.

The structure — which is currently 46 metres high but will be 145 metres when it's completed — was supposed to be towed out to the west White Rose field in 2021, but that has now been delayed by one year.

Trevor Pritchard, Husky's senior vice-president for the Atlantic region, said construction on the structure is behind schedule by a couple of months, and won't be ready in time to sail during the "weather window" — typically May to November for offshore Newfoundland.

The tow-out operation can happen only during the time of year when weather conditions are favourable.

"Offshore Newfoundland, we only have a certain number of weeks, maybe stretching that to months, and if we miss that weather window of a couple of months, then we've lost that for a year," Pritchard said.

Fabrication and construction will continue during that time, meaning more of the work will be completed onshore rather than offshore, and Pritchard said that does have benefits.

"Pacing will be safer generally and more cost-effective," he said.

First oil is still expected in 2022, but in the fourth quarter instead of the first. Pritchard expects drilling to begin only a few months later than originally forecast.

Pritchard said the update is "neutral news," not good or bad.

For some of the people employed by the project, it could mean another year of steady work.

"The workforce is going to be there," said Pritchard. "We still have the same scope, just stretching out those hours of completions."