External Wall Insulation in Dublin
At Luca Line Services we specialise in the installation of external Insulation and we use the Cantillana external wall Insulation systemThe Cantillana system is a process whereby Expanded Polystyrene (EPS) insulation is fixed to the exterior wall of your house. The EPS board is reinforced with a base coat and fibreglass mesh. It is then rendered with a protective layer of acrylic finish which is available in up to 140 colours, brick or dash finish.
Insulating your home is a guaranteed return on investment. Your home will be a much warmer and comfortable place to be in winter, and a cooler more refreshing space in the warmer months.
Installing external insulation will help to reduce your heating bills by up to 30% by allowing your heating system to function more efficiently. The prevention of excess heat loss will ultimately result in your home needing less energy to heat itself.
Improve the energy efficiency of your home with external wall insulation
Benefits of External Wall Insulation
If you are looking to increase the efficiency of your home or building by acquiring insulation then you may be eligible for a grant from the Sustainable Energy Authority of Ireland (SEAI).
The Home Energy Saving Scheme was launched to encourage homeowners to improve the energy efficiency of their home and contribute to a greener environment. A grant up to €8000 is available and can make a considerable contribution to the cost of your insulation.
Is external wall insulation right for your home?
External wall insulation is the best option for homes with solid concrete, hollow block or stone walls, where there is no cavity to fill. It also suits homes where internal dry lining would mean losing room space or disturbing kitchens and bathrooms. Because the insulation goes on the outside, you can stay in your home while the work is done.
To qualify for the SEAI grant, your home must have been built and occupied before 2011, all external walls must be insulated, and the work must be carried out by an SEAI-registered contractor such as Luca Line Services. Your grant must be approved before work starts.
SEAI external wall insulation grant amounts
| House type | SEAI grant (2026) |
|---|---|
| Detached house | €8,000 |
| Semi-detached or end of terrace | €6,000 |
| Mid-terrace house | €3,500 |
| Apartment | €3,000 |
See our SEAI grants guide for the full list of insulation and heating grants you can combine with external wall insulation.
How we install the Cantillana EWI system
- Free survey: we measure your walls, check for damp, and confirm your grant amount.
- Grant application: we give you the paperwork for your SEAI application and wait for your grant offer.
- Preparation: scaffolding goes up, and downpipes, lights, satellite dishes and other fittings are removed. If ESB cables are fixed to the wall, a service alteration may be needed first.
- Insulation boards: Expanded Polystyrene (EPS) boards are bonded to the wall and secured with mechanical fixings.
- Base coats: a first base coat with fibreglass reinforcing mesh, then a second base coat.
- Finish: a primer, then the final acrylic render in your choice of up to 140 colours, or a brick or dash finish.
- Completion: fittings go back on, the site is cleaned, and you receive the documents needed for your post-works BER and grant claim.
How long does it take?
Most homes are completed within two weeks of the start date. The exact time depends on the size of the house and the Irish weather, because render cannot be applied in heavy rain or frost.
What to check before you start
- Planning permission: usually not needed, but protected structures and homes in architectural conservation areas may need permission. We will advise you during the survey.
- Window sills and reveals: the insulation adds depth to your walls, so sills are extended and reveals are insulated to avoid cold spots.
- Ventilation: a warmer, more airtight home needs good ventilation to prevent condensation. We check this as part of every job.
Thinking it over? Read Is external wall insulation worth it? and how much you can save on a hollow block house, or book your free survey.
FREQUENTLY ASKED QUESTIONS
How much does external wall insulation cost?
Our prices vary depending on the size of the property. On average, the grant value is €8,000 for a detached house, €6,000 for a semi-detached house, €3,500 for a mid-terrace house, and €3,000 for an apartment
How long does external wall insulation take to install?
Luca Line Services provide customers with a quick and efficient service. The length of time a project takes depends on a number of factors including the size of the building and the unpredictable Irish weather. However, we always work to have all projects completed within two weeks of the start date.