Proper standards are being met in the national retrofitting programme, the Minister for the Environment has said in the Dáil.
Eamon Ryan said that "the SEAI is in charge of delivering the retrofitting scheme, and has been given an additional 200 staff" in recent years.
He insisted the agency has the necessary expertise to ensure the programme's success.
"There has been specific attention from the very start to make sure that standards are upheld," he said.
"Because you're right", the minister told Sinn Féin TD Réada Cronin, "if you have to go back and retrofit a retrofit programme that is deeply damaging in a whole range of ways."
Ms Cronin had referred to concerns that were expressed to an Oireachtas committee about retrofitting standards earlier in the week.
She accused the Government of "playing fast and loose with public trust and public money".
The Kildare TD said that "optics over substance is taking green-washing to a whole new level".
Ms Cronin called for the appointment of "a carbon tsar".
Earlier this week, a UCD lecturer told the Joint Committee on Environment and Climate Action that some "A-rated homes are performing at C-levels" following retrofitting.
Oliver Kinnane outlined serious concerns around both the quality of work and materials used, which has been uncovered in research.
Around half the fabrics being used in retrofitting "are not meeting designing values", Mr Kinnane said, adding that he was surprised by this finding.
