The school's board, in a statement, said it "apologised wholeheartedly" to any alumni who may have experienced child sexual abuse at Launceston Church Grammar School campuses.

The school has campuses in two locations in Launceston, with the senior school at Mowbray and the junior school at Newstead.

A spokeswoman for the school said child sexual abuse is an "abhorrent crime" and Grammar wanted to provide support and acknowledgment for anyone wishing to seek redress through the scheme due to instances of abuse its campuses.

"The school is committed to being a child-safe organisation and caring for all our students, past, present and future," a statement from the school said.

"We also have a responsibility to learn from the past and to ensure the present and future safety of all students.

"To this end, the school has used and will continue to use the learnings of the Royal Commission."

Launceston Church Grammar School is working with the Australian Childhood Foundation to become a Safeguarding Children Accredited Organisation.

"Undertaking this external accreditation process reflects our commitment to fully implementing the recommendations of and Child Safe Standards in the Final Report of the Royal Commission."

Launceston Church Grammar School was formally included into the institutions who have signed up to the scheme on September 27.

On Tuesday, lawyers for abuse survivors welcomed the announcement that more than 300 additional sites had joined the redress scheme but said there was still a long way to go for justice.

Maurice Blackburn national head of Abuse Law Michelle James said while it was encouraging to see more organisations sign on to the redress scheme, many aspects of the scheme remained at odds with key recommendations of the Royal Commission.

"We welcome that more organisations and sites are joining the redress scheme - that is vitally important in enabling those survivors seeking redress via the scheme against these organisations to be able to do so," Ms James said.

Ms James said the lawyers also encouraged steps taken by the federal government to call out those organisations who continue to resist joining the redress scheme.

"However, we also continue to hold a number of concerns with the redress scheme in its current form, namely that in many important aspects the current scheme is out of step with recommendations made by the Royal Commission," she said.

Launceston Church Grammar School joins St Michael's Collegiate, Hutchins School and the Friends School as education providers in Tasmania who have signed up to the scheme.

To date, there are 27 Tasmanian organisations outside government agencies who have signed up to the national redress scheme.

For more information visit www.nationalredress.gov.au or call the National Redress Scheme line on 1800 737 377.