Floor insulation may be supported through an SEAI home energy upgrade grant, depending on your home, the proposed work and the application route you choose. Typically, you apply before work begins, either through an SEAI-registered contractor or directly through the relevant SEAI grant process, and you may need a pre-works BER assessment. Do not start the insulation work until SEAI confirms that your application is approved, as this could affect eligibility. Check the latest requirements on the official SEAI website and confirm the likely grant and technical options with a registered contractor; final approval depends on SEAI and your individual circumstances.