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Can I get a second wall insulation grant?

After a cavity wall grant you can apply for internal or external wall insulation. After an external wall insulation grant you cannot get a second wall measure.

SEAI’s rule, in its own words

  • A cavity wall grant can be followed by internal or external insulation.

    “If you previously received a grant for cavity wall insulation, you can apply for an internal wall insulation grant or an external wall insulation grant.” SEAI: Wall insulation grant, read 8 Jun 2026

  • After external wall insulation, no second wall measure.

    “If you previously received a grant for external wall insulation, you cannot apply for a second wall insulation measure.” SEAI: Wall insulation grant, read 8 Jun 2026

  • Every external wall has to be insulated for the grant.

    “To receive the grant, all external walls of your home must be fully insulated.” SEAI: Wall insulation grant, read 8 Jun 2026

Each quote links to the SEAI page it is from, read on 26 September 2026. Whether a grant is paid is SEAI’s decision on your application.

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