What SEAI grant is available for external wall insulation?

The SEAI offers cash grants for external wall insulation ranging from €3,000 for apartments up to €8,000 for detached houses. Mid-terrace homes qualify for €3,500, while semi-detached or end-of-terrace houses qualify for €6,000. Homeowners must hire an SEAI-registered contractor to claim these grants.

How long does EWI take to install?

For a standard semi-detached house, EWI installation typically takes 2 to 3 weeks. The process involves erecting scaffolding, preparing the walls, fixing insulation boards, applying base coats with reinforcing mesh, and adding the final silicone render. Weather conditions can affect the rendering phase.

Does external wall insulation require planning permission in Ireland?

In most cases, external wall insulation is considered exempted development and does not require planning permission. However, planning permission is mandatory if your house is a protected structure, situated in an Architectural Conservation Area (ACA), or if the finish significantly alters the character of the streetscape.

What is the best EWI system in Ireland?

The most popular and cost-effective EWI system in Ireland uses Grey Expanded Polystyrene (EPS) with graphite. For walls requiring high fire safety (like boundary walls), Mineral Wool (Rockwool) is used. Phenolic or PIR boards are preferred in tight spaces because they offer higher insulation values with thinner profiles.

How do I find a SEAI approved EWI contractor?

You can find SEAI approved external wall insulation contractors directly on BuildTrade.ie. All listed EWI businesses undergo strict verification checks to confirm their SEAI registration, CRO records, and public liability insurance. This guarantees your work qualifies for the government grants.

Does EWI increase home value in Ireland?

Yes, external wall insulation is one of the most effective ways to boost your property's value. It significantly improves your home's Building Energy Rating (BER), making it much more attractive to future buyers. It also gives the exterior a fresh, clean, and modern rendered look.

What is the difference between EWI and cavity wall insulation?

EWI is applied to the exterior of the house and covers the entire building in a continuous thermal blanket. Cavity wall insulation involves pumping beads or foam into the hollow space between block layers. EWI is more expensive but far more effective at eliminating cold bridges.

External Wall Insulation Contractors in Ireland

Looking for the best external wall insulation contractors in Ireland? Wrapping your home in high-efficiency insulation is one of the most effective ways to lower your energy bills, improve comfort, and increase your property value. At BuildTrade.ie, we connect you with vetted, fully insured, and SEAI-registered external insulation specialists in Ireland who install premium, NSAI-approved systems. Whether you are retrofitting an older home or working on a new build, our registered professionals ensure zero-tolerance installations that meet strict building standards and qualify for government grants. Get up to €8,000 back in SEAI grants to reduce your out-of-pocket costs. Compare free quotes from trusted local installers today and protect your home from heat loss, damp, and cold drafts with Ireland's top insulation experts.

Up to €8,000

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What is External Wall Insulation?

External wall insulation, also called EWI or house wrapping, is a system of thermal insulation boards fixed to the exterior walls of a building, reinforced with a glass fibre mesh, and finished with a weather-resistant silicone render.

How Much Does External Wall Insulation Cost in Ireland?

Here are typical price ranges and baseline estimates for external wall insulation in Ireland.

House Type	Typical Area (m²)	Gross Cost	SEAI Grant	Net Cost
Mid-Terrace House	60 - 80 m²	€8,500 - €12,000	€3,500	€5,000 - €8,500
Semi-Detached (3-Bed)	100 - 130 m²	€12,500 - €18,000	€6,000	€6,500 - €12,000
Detached House	150 - 200 m²	€18,500 - €28,000	€8,000	€10,500 - €20,000
Apartment	40 - 60 m²	€6,000 - €9,000	€3,000	€3,000 - €6,000

* Prices include materials, labor, scaffolding, and final render. Actual quotes depend on wall condition and finishes.

SEAI External Wall Insulation Grants

Homeowners can claim substantial cash grants from the Sustainable Energy Authority of Ireland (SEAI) to reduce EWI costs. Learn more at SEAI.ie.

Apartment€3,000

Mid-Terrace House€3,500

Semi-Detached / End-of-Terrace€6,000

Detached House€8,000

All grants require the work to be completed by a SEAI-registered contractor using NSAI-approved systems.

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