SEAI may support attic insulation through its home energy upgrade grants in 2026, but the available amount and eligibility depend on the scheme, property and applicant circumstances. You will generally need to apply and receive approval before work begins, using an SEAI-registered contractor where the scheme requires one. Households meeting specific income and housing conditions may instead qualify for support through the Warmer Homes Scheme. Check SEAI’s current grant guidance and confirm the proposed work with a registered contractor, as SEAI makes the final decision.