The Name You Can Trust | Est. 1984

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Insulation on the outside. Warmth on the inside.

What is external wall insulation?

External Wall Insulation (EWI) is a wrap-around insulation system for homes with solid block or hollow block walls. It involves fixing rigid insulation boards to the exterior of your home, then covering them with a reinforced render. This protects against heat loss, improves comfort and qualifies for SEAI grants of up to €8,000.

How it works

  • Rigid insulation boards are fixed to your outer walls
  • A mesh-reinforced basecoat and weatherproof render is applied
  • The system improves your BER and cuts heating bills
  • It also refreshes your home's exterior finish in the process

We’ll confirm the correct board type and thickness for your home during your free survey.

  • SEAI Grant Approved

    Up to €8,000 in insulation grants available for eligible homes

  • Full Wrap System

    Continuous insulation over external walls — no cold bridges

  • Durable Render Finish

    Modern weatherproof finish, mesh-reinforced for long life

Types of external wall insulation

We install SEAI-compliant systems suited to your home

  • EPS Board + Render – Cost-effective and widely used in Irish homes
  • Mineral Wool Board – Higher fire resistance and breathability for multi-units or urban areas
  • Phenolic or High-Performance Board – Thinner profile with better U-values in tight spaces

We’ll recommend the right system based on your wall type, insulation goals and SEAI grant requirements.

What customers say

“We had external wall insulation installed in 2023 — the house holds heat all evening now and the finish looks like a new build.”
— Mary L., Sligo

“Our heating bills dropped immediately. Premier handled the grant, the install, and even fixed an old soffit.”
— Brendan M., Kildare

What’s included

  • Full survey and BER check (if needed)
  • Rigid insulation board installation
  • Reinforced basecoat, mesh and final render
  • New window reveals, sills and minor services adjustments
  • SEAI documentation and photo pack for compliance

We use NSAI-approved systems and follow best-practice detailing on all EWI installs.

certification

Where we work

We install external wall insulation across all 32 counties in Ireland, with trained crews and support for homeowners, landlords and retrofit clients.

See service areas

Part of a full home energy upgrade

External wall insulation is often installed alongside:

  • Attic insulation
  • Heating controls or heat pumps
  • Solar PV systems

We can quote for everything at once and maximise your SEAI grant package. See grant info

Ready to upgrade your external walls?

Book a free survey and we’ll assess your wall type, grant eligibility and confirm the right insulation system for your home.

Book Free Survey

Quick answers

Can I get a grant for external wall insulation?

Yes — up to €8,000 is available for detached homes, with lower amounts for smaller properties. You must use an SEAI-registered contractor like us.

How long does the installation take?

Most homes take 5–7 days depending on size and complexity. We’ll confirm the schedule during your survey.

Can you insulate one wall only?

Yes — we can insulate individual elevations (e.g. north-facing wall) if full wrap isn't needed. Partial grant support may apply.

Is external wall insulation suitable for all homes?

It works best on solid block, hollow block or cavity-extracted walls. We’ll assess suitability during your survey.

What does the finish look like?

We apply a coloured, weatherproof render — modern, clean, and long-lasting. It improves the look and value of your home.