Second wall grant: the wrap after cavity fill

Figures checked against seai.ie on 28 October 2026.

What you can apply for

seai.ie wall insulation page, checked 28 October 2026.

The wrap as a second measure

For most homes that had a cavity or internal grant, the wrap is the natural next step. The second measure is designed to let homes insulated with cavity fill or dry lining upgrade further, to make the home heat pump ready. The amounts are the standard external grants:

All the usual rules apply: the home built and occupied before 31 December 2010, an MPRN, an SEAI-registered contractor, a grant offer before work starts, and every external wall fully insulated.

Why cavity homes often go external next

A cavity fill only insulates the gap between two leaves of block. The wrap adds a layer outside the whole wall, which also covers the edges of floors and the corners where heat escapes. On SEAI's figures the external grant for a semi-D is €6,000, against €1,300 for the cavity fill. Our sister site has more on the second wall insulation grant for cavity homes.

After dry lining: external only

Internal insulation can only be followed by external. Dry lining the same walls again isn't a second measure. If your old dry lining is damp or damaged, ask the contractor to look at it before the wrap goes on.

After the wrap: no second measure

No second wall measure is available. If the existing wrap is cracked or failing, that's a repair job for the original contractor or a new one, without a wall grant.

Timing the second measure

What matters is the order: grant offer first, then the work, then the post-works BER and the claim. If a heat pump is also in your plans, insulate first. SEAI asks older homes for a heat loss check before a heat pump grant, and wall insulation lowers the heat loss that check measures. See HLI in the glossary.

Before you apply

• Find your MPRN on your electricity bill: SEAI tracks grants by MPRN
• Find the paperwork from the first job: the year, the contractor and what was done
• Get a survey and a written price from an SEAI-registered contractor
• Check the planning rules: up to 150 mm, not onto a public road, in keeping
• Get the grant offer from SEAI before any work starts

How to apply

1. Find a registered contractor and get quotes.Use a contractor on SEAI's register for external wall insulation. Get written prices with VAT.
2. Get the grant offer.Apply to SEAI, or let a One Stop Shop apply for you. Accept the offer before any work starts.
3. The work is done.Every external wall, fully insulated.
4. Post-works BER.A BER assessor rates the home after the work. See post-works BER.
5. Submit your evidence.Send SEAI the completed paperwork from the contractor and the BER.
6. SEAI pays the grant.After the work, to you, unless a One Stop Shop took it off your price. SEAI may inspect the work.

Use the grant check on this page and pick the wall grant you had before. It shows the grant for your home type straight away.

Questions people ask