Timber Frame in Ireland — Why It's the BER A1 Default and What to Watch For

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).

TL;DR

• Timber frame in Ireland: €200–€280/m² of wall. 2–4 weeks to weathertight on a 150 m² house.

• U-value 0.13–0.18 W/m²K with standard build-up. Airtightness 0.3–0.8 m³/m²·hr at 50 Pa achievable.

• Fastest wall system to A1 BER. Lightest (good for difficult sites). Most common in BER A1 self-builds.

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.

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.

Sources

Building Regulations 2023, TGD-L. https://www.gov.ie/