Timber Frame in Ireland — Why It's the BER A1 Default and What to Watch For
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Timber frame: €200–€280/m² wall. 2–4 weeks to weathertight. U-value 0.13–0.18. Airtightness 0.3–0.8 m³/m²·hr.
Timber frame is the default wall system for BER A1 self-builds in Ireland. €200–€280/m² of wall. A 150 m² house reaches weathertight in 2–4 weeks. U-value 0.13–0.18 W/m²K with standard build-up (200 mm mineral wool insulation + 50 mm insulated sheathing). Airtightness 0.3–0.8 m³/m²·hr at 50 Pa achievable with a continuous membrane. Lightest wall system — good for difficult sites with poor access (delivered as panels). Most common in BER A1 self-builds and Passive House builds. Watch out for: trades' experience (not all Irish builders are timber-frame-trained; check references), and the detailing at junctions (windows, doors, services need careful design for airtightness).
When this matters most
You're considering timber frame and need to know the trade-offs.
When this doesn't apply
You've already chosen a wall system.
Sources
Building Regulations 2023, TGD-L. https://www.gov.ie/
Frequently asked questions
How much does timber frame cost in Ireland?
€200–€280/m² of wall. For a 150 m² house: €40,000–€56,000 for the wall system, including panels and labour.
Is timber frame good for BER A1?
Yes — the default choice. Fastest wall system to A1 BER. U-value 0.13–0.18 W/m²K. Airtightness 0.3–0.8 m³/m²·hr achievable. The cleanest path to A1.
What are the disadvantages of timber frame?
Trades' experience varies — not all Irish builders are timber-frame-trained. Detailing at junctions (windows, doors, services) needs careful design for airtightness. Some people prefer the solidity of block or ICF.
When this matters most
You're considering timber frame and need to know the trade-offs.
When this doesn't apply
You've already chosen a wall system.
Where to go next
Next decision
The next step in your build sequence.
- Blockwork for a Self-Build in Ireland — The Default Wall, with External Insulation →
- CLT in Ireland — Cross-Laminated Timber, the Premium Mass-Timber Wall →
- Do Mortgage Lenders Care Which Wall System You Use in Ireland? →
- Wall System and Insurance in Ireland — What Your Insurer Will and Won't Cover →
- Wall System Build Speed in Ireland — Weeks to Weathertight on a 150 m² House →
- Wall U-value Comparison in Ireland — Five Systems, the Numbers →
Branch into
Adjacent decisions at the same stage.
Watch out for
Common mistakes, hidden costs, gotchas.
- ICF in Ireland — Insulated Concrete Formwork, Cost, Speed, and When to Choose It →
- ICF vs Timber Frame vs Block in Ireland — Cost, Speed, U-value, BER Side by Side →
- SIPs in Ireland — Structural Insulated Panels, Cost, Speed, and When the Premium Is Worth It →
- Wall System Cost per m² in Ireland 2026 — Five Systems, the Live Numbers →
Compare with
Alternative approaches worth knowing.