HOW TO HIRE · TRADES & CONSTRUCTION · CHECKED OCTOBER 2026
A cavity wall insulation in Ireland costs €700–€1,800 per job, typically around €1,200. Here is how to check that in a minute, what to ask before you book, and what you must be handed when the job is done.
THE 60-SECOND VERSION
BEFORE YOU BOOK
REGISTERED FOR WHAT, EXACTLY. Contractors may only carry out the measures they are registered for, so a contractor on the list for insulation is not thereby approved for a heat pump. A renewable installer registers with SEAI first and then adds heat pump or solar PV. For solar PV the INSTALLER applies to ESB Networks for the grid connection, not you. Registration is not a licence to trade — anyone may install insulation. It is MANDATORY TO GET THE GRANT, which is the practical constraint for almost every homeowner.
Search the SEAI Registered Contractor List for the name or the registration number before you agree a price. seai.ie →
Expect public liability; grant work also carries SEAI's own code of practice. From a company, ask for the insurer, the limit and the VAT number, and ask who actually attends: the team that turns up may be employed, subcontracted or both, and only one of those is supervised by the firm you are paying.
Ask to see the current certificate of insurance — the insurer's name, the limit and the date it runs to.
Under the Consumer Rights Act 2022 a trader must tell you they are a trader, and your consumer rights — work carried out with reasonable skill and care, and a cooling-off period on a contract agreed in your home or online — apply to traders and not to private sellers. On Locufy the trader status is shown on the profile.
Look for the trader badge on the Locufy profile, and ask anyone else for it in writing before you agree a price.
Providers on Locufy prove who they are with photo ID before they can be booked; the ID-checked badge shows who has done it, and the document itself is deleted once the check is made. For a cavity wall insulation installer coming into your home it is the cheapest check there is.
Look for the ID-checked badge on the card, before you message anyone.
VAT at 13.5%, the reduced rate Revenue publishes for this service. Ask whether the price you were given includes it. A trader under the €42,500 registration threshold does not charge it; one over it must, and must show it separately.
Ask whether the figure you were given includes it, and for the VAT number if they are registered — Revenue publishes the rate for this service. revenue.ie →
A good answer: A number you can look up yourself before you agree a price — installation Process — the installation involves drilling small holes into the outer wall and injecting the insulation material into the cavity.
A good answer: The bigger it is, the more materials go into it. — ask before the quote rather than after.
A good answer: What is used up on the job is charged whether or not it is all needed. — ask before the quote rather than after.
A good answer: A well-kept job is quick; a neglected one rarely is. — ask before the quote rather than after.
A good answer: Cavity wall insulation does not cover repairs to existing structural damage or issues such as damp proofing — get the exclusions named in the quote, because a cavity wall insulation installer job is priced on what was agreed and not on what was assumed.
A good answer: Expect public liability; grant work also carries SEAI's own code of practice — insulation Material Options — various materials can be used for cavity wall insulation, such as mineral wool, polystyrene beads, or foam.
A good answer: A written scope and a price before the cavity wall insulation installer starts, and an itemised invoice after — initial Assessment — before installation, a thorough assessment of your property is conducted to identify the best insulation solution.
The figures are for the job, per job, and a quote for your own is the only number that binds anyone. Insulation assessment and Insulation installation each carry their own band. Cavity Wall Insulation price guide →
Guide prices compiled by the Locufy team from published Irish and UK provider price lists and 2026/27 cost guides. Updated 2026.
KNOW WHAT TO LOOK FOR? NOW FIND ONE
ID checked, trader status and one score from every review — on the card, before you message anyone. Nearest first. No account needed to look.
Or post the job free and let them come to you.
AFTER
MONEY BACK
Who: Owner of a home built and occupied before 2011. Work by an SEAI-registered contractor, with a BER after the works.
Official details on seai.ie →Who: Homeowners getting certain social welfare payments. The scheme prioritises the oldest, least energy-efficient homes.
Official details on seai.ie →Schemes change. The amounts above were checked on the dates shown; the official page is the one that counts.
The cost can vary based on the size of the property, the type of insulation material chosen, and any necessary repairs to the walls. Accessibility and the complexity of the installation may also affect pricing.
Typically, the installation of cavity wall insulation can be completed in a day for an average-sized home. However, larger properties or those requiring extensive repairs may take longer.
Emergency services for cavity wall insulation are rare, as the process requires planning and assessment. However, some contractors may offer expedited services depending on their availability.
Yes, many contractors offer package deals for multiple services such as insulation, draught-proofing, or energy efficiency audits. This can often lead to cost savings.
Search the name or the registration number. If the number does not resolve to the name on the quote, stop there.
Under the Consumer Rights Act 2022 the work must be carried out with reasonable skill and care, and put right if it is not. Say what is wrong in writing first.
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