How to Check Cork Insulation Companies in 2026

Use live official registers and comparable written scopes rather than relying on an old directory, ranking or unverified service claim.

Start with the current official registers

Contractor status and the measures covered by a registration can change. Search SEAI's registered professional directory on the day you shortlist a provider. SEAI's support guidance warns that registration for one measure does not automatically cover another.

For external wall insulation, also check the proposed system and installer route against NSAI Agrément information. NSAI says an approved external-insulation system should be installed by an approved installer.

Build a shortlist without rankings

  1. Filter the official register for the required measure and location.
  2. Ask each provider to confirm the exact legal or trading name and registration used for the job.
  3. Request recent, relevant project references that you can contact.
  4. Ask who will survey, design, supervise and sign the required declarations.
  5. Keep the shortlist open until the property survey identifies the appropriate measure.

What to ask any Cork insulation contractor

  1. What did the survey establish? Ask for the wall construction, defects, exposure and existing insulation to be recorded.
  2. What exact scope is included? Insulation area, preparation, ventilation, services, junctions, finishes and making-good should be explicit.
  3. What product or system is proposed? Ask for certification and the installation specification, not only a brand name.
  4. Who carries each responsibility? Clarify grant application, assessor, declarations, inspection and final documents.
  5. What warranty is offered? Obtain the provider, duration, exclusions, maintenance conditions and claim process in writing.
  6. What is excluded? Scaffolding, repairs, electrical or plumbing alterations, planning matters and decoration can materially change the final scope.

Compare like with like

SEAI recommends a written contract covering works, price, timing, payment terms and warranties. Put each quote into the same checklist before comparing totals. A low number with missing preparation, ventilation or making-good is not the same scope as a complete proposal.

Important: this page does not endorse, rank or verify any named company. Registration is one check, not a guarantee of a particular price or outcome. Verify current status directly and carry out normal contract and reference checks.

See NSAI's external wall insulation guidance and our wall-insulation route checklist.

Send a retrofit enquiry

Describe the property and the information you need. This form does not confirm grant eligibility, installer status, pricing or outcomes.

We do not install works. An enquiry may be shared with a relevant provider; independently verify any provider on SEAI's current register before proceeding.