The government will also cover up to 80 per cent of the cost of smaller projects - like insulating an attic.
The Environment Minister says a new retrofit scheme is the best way of tackling rising energy costs.
Speaking on his way into cabinet, Minister Eamon Ryan says it'll help bring down energy bills:
"This new 80% grant for an attic and wall insulation is the best way of fighting energy inflation. This cuts the bills, it's actually you know best protection against international factors we don't have control of, we can control our energy use here at home. That's the best way."
