Double Glazed Windows Dublin & Ireland — Prices, Grants & A-Ratings

Casement double glazing starts at €600 + VAT per window supplied and fitted, with old window removal included. For a typical Dublin 3-bed semi (10 windows) expect €6,000-€8,000 for casement, €7,500-€9,500 for French style, €9,000-€11,000 for flush sash, or €9,500-€12,000 for sliding sash. Triple glazing adds €150-€200 per window. SEAI grants of €5,000-€8,000 are deducted from these prices for eligible homes. Free itemised quote within 24 hours — call 01 822 8982.

For most Dublin, Kildare and Wicklow homes built between 1970 and 2010, double glazing is the smarter financial choice. Triple glazing pays back its €1,500-€2,000 premium over 18-22 years; double pays back in 7-10. Spec triple if you are doing a deep retrofit, building new to BER A2, or replacing north-facing bedroom windows. Spec double for south-facing rooms, listed buildings, conservation areas, and any standard like-for-like upgrade. We are happy to recommend a mixed spec — it usually saves €1,000-€1,500 with under 5% performance loss.

Yes. Every Airtight double glazed window achieves U-value 1.4 W/m²K and qualifies for the SEAI Better Energy Homes scheme. Grant amounts: €5,000 for mid-terrace, €6,500 for semi-detached, €8,000 for detached. Doors qualify separately for up to €800 per door. Combined window + door grant capped at €4,500 in many cases. Eligibility: home built before 2011, current BER C3 or lower, SEAI-registered installer (we are). Homeowners apply directly to SEAI — we provide the contractor details and post-works BER documentation required for your application.

The Building Regulations Part L 2025 require replacement windows to achieve U-value ≤1.4 W/m²K. A-rated double glazing typically hits exactly this number. For comparison: 1990s double glazing was around 2.8-3.1 W/m²K, modern triple glazing is 0.8 W/m²K, and Passive House standard is below 0.8. The lower the U-value, the less heat escapes. SEAI grants require ≤1.4.

Yes — but only if your walls and attic are already insulated. Old single-glazed or first-generation double-glazed windows leak roughly 25-30% of a home's heat. Replacing them cuts heating bills by €480-€620 per year for a typical 3-bed semi. However, if your cavity walls are uninsulated, you will lose more heat through the walls than the windows. We recommend insulating the attic (cheapest fix), then walls, then windows for maximum return on investment. If you are doing a full SEAI One Stop Shop retrofit, all three happen together.

Often yes, with the right product. Most Dublin conservation areas (Georgian core, parts of Rathmines, Ranelagh, Dún Laoghaire) accept timber-effect uPVC sliding sash double glazing where the original sightlines and bar profiles are matched. Buildings on the Record of Protected Structures (RPS) require planning permission and usually slim-profile vacuum or heritage double glazing. We have completed conservation-area installations across Dublin 2, 4, 6 and 8 — call 01 822 8982 and we will tell you straight whether your property qualifies.

uPVC frames: 25-30 years inland, 20-25 years on the coast (we use marine-grade uPVC for Howth, Skerries, Bray). Aluminium frames: 40+ years anywhere. Sealed glass units: 20-25 years before argon gas levels start to drop noticeably. Hardware (handles, hinges, locks): 15-20 years. Every Airtight installation comes with a 10-year guarantee covering glass, frames, hardware and workmanship.

Owen responds within 24 hours and books the earliest available survey slot. Manufacturing 3-4 weeks (Irish suppliers, no UK shipping delays). Installation 1-2 days for a typical 3-bed semi, 2-3 days for a detached. Old windows removed and disposed of, all debris cleaned up, and your 10-year guarantee certificate issued on the day. No deposit required — payment on completion.