A tighter home still needs to breathe.
Consider windows, doors and ventilation together, with the insulation and moisture checks that make them work.
Plan my windows & ventilationWindows & ventilation: the useful starting point.
New windows, doors and ventilation need a joined-up specification. SEAI’s January–June 2026 median gross window-upgrade cost for a semi-detached or end-terrace home was €7,110. That figure does not include a separate door or ventilation installation.
Your next step: Ask for the openings schedule, ventilation plan, making-good work and grants as separate lines.
What the installer needs to assess
- Opening quantities and thermal performance
- Existing attic/wall insulation and grant requirements
- Ventilation design and how condensation risks are addressed
What a complete quote should include.
- Window and door quantities, performance and installation details
- Existing attic and wall insulation and grant prerequisites
- Ventilation design, airflow, noise and commissioning
- Making good, disposal, warranties and final certification
Good questions to ask.
Can I get a window grant without a full retrofit?
SEAI now lists an individual window and door route, with conditions including insulation requirements. Confirm the current rules and the exact scope before ordering.
Will new windows fix condensation?
Not necessarily. Moisture sources, heating and ventilation also matter. A survey should consider the whole home rather than promising a cure from window replacement alone.
Good decisions start with a clear brief.
Use our guides to understand costs, grants and the questions to ask before booking work.
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