External Wall Insulation Cost per m² in Ireland
External wall insulation cost per m² in Ireland (2026), including installation scope, VAT treatment, scaffolding impact and key structural cost drivers.
Typical installed cost: €120–€230 per m²
External Wall Insulation Costs in Ireland
External wall insulation (EWI) in Ireland typically costs €120–€230 per m² installed.
Variation comes from insulation type, board thickness, render system, access requirements, scaffolding, detailing complexity and wall condition.
Most semi-detached houses fall within approximately €150–€175 per m².
Per-m² pricing is a useful benchmark, but total project cost still depends on the actual external wall area and site conditions.
Typical Installed Cost Ranges
Budget EPS 80–100mm: €120–€145/m²
Mid-range EPS 100–120mm: €145–€180/m²
Mineral wool: €160–€200/m²
High-spec phenolic / premium finish: €180–€230/m²
Material specification and finish quality are the main variables within the installed rate.
What the Rate Includes & Labour Cost
What the Per-m² Price Commonly Includes
Insulation boards, adhesive and fixings, reinforcement mesh, base coat, primer, render finish, standard labour and basic window/door detailing are commonly included.
Scaffolding, structural crack repair, sill replacement, roof-overhang extensions and rainwater-goods replacement are commonly excluded.
Labour Component
Total labour typically comes to €45–€69 per m² ex VAT.
Uneven walls, numerous window openings, complex architectural details and elevations above normal two-storey access increase labour intensity.
Material & Labour Cost Breakdown
Material Cost per m² (Ex VAT)
| Component | Typical Range |
|---|---|
| EPS board (100mm) | €40–€50 |
| Mineral wool board | €55–€70 |
| Fixings & adhesive | €10–€15 |
| Base coat & mesh | €15–€20 |
| Finish render | €18–€25 |
Material cost alone typically ranges from €83–€130 per m² ex VAT.
Labour Cost per m² (Ex VAT)
| Labour Element | Typical Range |
|---|---|
| Board installation | €20–€30 |
| Base & mesh application | €10–€15 |
| Finish coat application | €8–€12 |
| Detailing & sealing | €7–€12 |
Total labour: €45–€69 per m² ex VAT.
Scaffolding Impact on Cost
A full-perimeter scaffold for a two-storey semi typically costs €2,000–€3,500 and is often priced separately.
A €2,500 scaffold adds roughly €25/m² on 100m² of wall area, but only about €18/m² on 140m².
Smaller homes therefore carry a higher effective scaffold cost per square metre.
Wall Area, Project Examples & Thickness
Project Examples
| Property | Wall Area | Assumed Rate | Base Cost | 7% Contingency | Total Allowance |
|---|---|---|---|---|---|
| 3-bed semi | 110m² | €160/m² | €17,600 | €1,232 | €18,832 |
| Detached house | 180m² | €175/m² | €31,500 | €2,205 | €33,705 |
| Small bungalow | 85m² | €140/m² | €11,900 | €833 | €12,733 |
Insulation Thickness & Cost Impact
| Thickness | Typical U-Value Improvement | Cost Impact |
|---|---|---|
| 80mm EPS | Moderate | Baseline |
| 100mm EPS | Improved | +€5–€10/m² |
| 120mm EPS | Strong | +€10–€20/m² |
| 140–150mm mineral / phenolic | High | +€20–€40/m² |
Greater thickness increases material spend, reveal detailing labour and fixing requirements.
VAT Treatment
The source page lists 13.5% VAT for qualifying installed residential works and 23% for retail material-only purchases and professional services.
Confirm VAT treatment and whether it is already included when comparing quotations.
Regional Variation
External wall insulation pricing may vary by around 5%–15% regionally.
Higher pricing is common in Dublin and commuter-belt counties, but specification remains the dominant cost driver.
Common Cost Drivers
Material type, board thickness, render finish, scaffold duration, window-reveal depth, surface preparation and weather delays all affect the final rate.
Complex façades increase labour intensity significantly.
Summary
External wall insulation in Ireland typically costs €120–€230 per m² installed.
Most standard semi-detached homes fall around €150–€175 per m², with total project budgets commonly between €12,000 and €35,000.
Final cost depends on wall area, specification, access and detailing complexity.
Other resources:
Internal vs External Cost Comparison