Window and door installers across Ireland for uPVC, aluminium, and timber replacements, composite doors, sliding doors, and SEAI grant-approved glazing upgrades — covering Dublin, Cork, Galway, Limerick, and all 26 counties

Replacement uPVC windows in Ireland typically cost between €400 and €900 per window, including fitting. A full house window replacement for a three-bedroom semi-detached home usually costs between €5,000 and €12,000 depending on window count, size, and glazing specification. Triple glazing costs more than double-glazing but offers significantly better energy performance. All Ranksy-listed installers provide free, no-obligation quotes.

The SEAI Better Energy Homes scheme offers grants for window and door upgrades as part of a whole-home retrofit. The grant for windows is currently up to €1,500 and for external doors up to €800. To qualify, the windows and doors must meet minimum U-value standards and be installed by a SEAI-registered contractor. All Ranksy-listed window installers are SEAI registered.

Ranksy has one vetted window and door installer per county across all 26 counties of Ireland — from Dublin, Cork, and Galway to Sligo, Cavan, and Monaghan. Whether you are in a city suburb or a rural townland, check the directory to see if your county spot is still available. Urban areas are filling fastest given high demand for energy upgrades.

Yes. All window installers on the Ranksy network hold relevant certification for their products and installation methods. NSAI (National Standards Authority of Ireland) certification confirms that windows and fitting methods meet Irish building standards. This is important for energy grants, building compliance, and resale value. Your installer will provide all certification documentation on completion.

A typical full house window replacement (8 to 12 windows) takes 1 to 3 days. Individual window or door replacements are usually completed within a few hours. Bi-fold and large sliding doors take slightly longer due to structural opening requirements. Your installer will give you a firm timeline after measuring up and confirming the order.

Current Irish building regulations (TGD Part L) require a maximum U-value of 1.4 W/m²K for replacement windows in existing dwellings. For SEAI grant eligibility, windows must achieve at least 1.4 W/m²K or better. Triple-glazed windows typically achieve 0.8 to 1.0 W/m²K, and high-performance double-glazed units reach 1.2 to 1.4 W/m²K. Your installer will specify U-values in the quote.

uPVC is the most popular choice in Ireland — it is low maintenance, thermally efficient, and cost-effective. Aluminium is preferred for contemporary homes and larger openings due to its slim sightlines and strength. Timber windows suit older and period properties and can be more appropriate for protected structures. Composite doors combine a timber core with a GRP outer skin, offering excellent security and insulation.

Replace your windows if you notice condensation forming between the glass panes (failed seal), cold draughts around the frame, visible damage or warping, difficulty opening or closing, or if the windows are more than 20 years old and single glazed. New windows typically reduce heat loss through windows by 50% or more and can meaningfully lower your heating bills.