Traditional Homes Grant Ireland
Pre-1940 solid-wall and stone homes are excluded from the standard insulation grant for good reason. Here’s how the Traditional Homes Pilot works instead, breathable materials, no fixed BER target.
Why Traditional Homes Need a Different Approach
Traditional homes, generally built before 1940, are constructed differently from modern housing: solid masonry or stone walls without a cavity, lime-based renders and mortars, and timber or metal-framed windows. These buildings were designed to manage moisture by breathing, allowing air and moisture to pass through the wall structure.
Modern insulation and renders are often non-breathable. Applying them to a traditional wall can trap moisture and cause overheating or mould rather than solve the original problem. Traditional homes are explicitly not eligible for the standard individual wall insulation grant, this is a genuine technical distinction, not a bureaucratic technicality.
Eligible homes: pre-1940s properties with solid masonry or stone walls, lime-based render, and traditional timber or metal-framed windows. Approximately 270,000 dwellings in Ireland predate 1945, around 16 percent of the private housing stock.
Traditional Homes Pilot vs Standard OSS
| Standard OSS / Better Energy Homes | Traditional Homes Pilot | |
|---|---|---|
| BER target | B2 or better | No fixed target |
| Materials | Mineral wool, EPS, PIR | Breathable: lime plaster, hemp, breathable cork/lime render |
| Scope | Individual measures available | Whole-house only |
| Provider | Any registered OSS provider | OSS provider + Traditional Building Professional |
In many cases, an A-rated traditional home isn’t achievable without compromising the building’s original fabric. The approach is to apply upgrades appropriate to the specific building, not chase a specific letter grade.
A Published SEAI Case Study
50mm Breathable Insulation, Both Sides of the Wall
This pre-1940 stone farmhouse used 50mm external and 50mm internal breathable cork/lime insulating plaster on the stone walls, alongside an air-to-water heat pump replacing an oil boiler and stove back boiler, underfloor heating on the ground floor, high-output radiators upstairs, and a mechanical ventilation heat recovery (MVHR) system to match the improved airtightness.
Lime plaster drying time ran longer than expected, extending the schedule. SEAI’s own notes describe the pilot as “a welcome alternative to the other SEAI grant schemes, especially because it recognised the sensitive approach required when working with older buildings.”
Breathable Materials and Methods
Breathable Lime Plaster
Allows airflow through stone walls, often required for older masonry construction.
Hemp Insulation
Breathable and sustainable, suited to traditional wall build-ups.
Cork/Lime Breathable Plaster
Used internally and externally, as demonstrated in SEAI’s own case study.
Secondary Glazing
Retains original single-pane windows while improving thermal performance.
Heat Pump + Underfloor Heating
Modern heat pump technology paired with traditional-appropriate distribution.
MVHR
Matches improved airtightness with mechanical ventilation heat recovery.
How It Works
Confirm Your Home Qualifies
Generally pre-1940, solid masonry or stone walls, lime-based render, traditional windows.
Select an Experienced OSS Provider
They’ll engage a Traditional Building Professional as part of the process.
Building Fabric Analysis
A comprehensive assessment of construction type and condition, including thermal bridge assessment.
Retrofit Strategy Developed
Conservation-led, breathable, reversible interventions specific to your building.
Application and Whole-House Works
The OSS provider applies to SEAI and manages insulation, heating, windows, and ventilation together.
Completion and BER Assessment
Confirms the improvement achieved, without a fixed target grade.
Limitations
Inappropriate materials cause real damage. Standard modern insulation and renders can trap moisture in a traditional wall, leading to overheating or mould. Avoiding this is the entire premise of the pilot.
Not Available as a Single Measure
The pilot is a whole-house upgrade programme. A homeowner wanting wall insulation alone doesn’t qualify through this route.
Cannot Combine With Certain Other Schemes
A homeowner eligible for the Vacant Property Refurbishment Grant or Croí Cónaithe cannot also fund identical works through the Traditional Homes Pilot.
Longer Timelines Are Common
Specialist material lead times and lime plaster drying times extended the schedule on SEAI’s own published case study.
Capacity Is Limited
SEAI has stated it’s seeking around 100 traditionally constructed homes to participate, not an open-ended scheme in the same way as standard grants.