Few Irish records weren't burnt.

What was lost?
Apart from a few fragments, the Irish Censuses of 1821, 1831, 1841, and 1851 were burned in the Public Records Office.

So, too, were just over half of all the Anglican Church of Ireland registers deposited there following the dis-establishment of the state church in 1869.

In addition, the majority of wills and testamentary records that had been proved in Ireland were reduced to ashes.

All pre-1900 documents from the legal courts were lost, as were local government records for the same period.

Nearly all export and trade records from the 18th to early 20th century also perished, as did Wills (although transcripts of many testamentary records survive)

What was lost?

Apart from a few fragments, the Irish Censuses of 1821, 1831, 1841, and 1851 were burned in the Public Records Office. So, too, were just over half of all the Anglican Church of Ireland registers deposited there following the dis-establishment of the state church in 1869.
In addition, the majority of wills and testamentary records that had been proved in Ireland were reduced to ashes.
All pre-1900 documents from the legal courts were lost, as were local government records for the same period.
Nearly all export and trade records from the 18th to early 20th century also perished, as did Wills (although transcripts of many testamentary records survive)
- See more at: http://www.irish-genealogy-toolkit.com/irish-records-burned.html#sthash.nZl3JVDV.dpuf

What was lost?

Apart from a few fragments, the Irish Censuses of 1821, 1831, 1841, and 1851 were burned in the Public Records Office. So, too, were just over half of all the Anglican Church of Ireland registers deposited there following the dis-establishment of the state church in 1869.
In addition, the majority of wills and testamentary records that had been proved in Ireland were reduced to ashes.
All pre-1900 documents from the legal courts were lost, as were local government records for the same period.
Nearly all export and trade records from the 18th to early 20th century also perished, as did Wills (although transcripts of many testamentary records survive)
- See more at: http://www.irish-genealogy-toolkit.com/irish-records-burned.html#sthash.nZl3JVDV.dpuf