Sliding sash window replacement in Ireland
Replacing rattling, single-glazed vertical sliding sash windows in Ireland costs €950 to €1,750 per window in heritage spring-balanced uPVC (with run-through sash horns, deep bottom rail and astragal bars) or €1,550 to €2,650 per window in double-glazed Accoya/hardwood timber or aluclad.
Heritage uPVC vs engineered timber sliding sash windows, tilt-in cleaning latches, acoustic glass and conservation rules.
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Heritage uPVC vs timber sliding sash prices
| Sliding sash replacement type | Typical price per window (fitted) | Typical 8-window house package | Key features |
|---|---|---|---|
| Heritage uPVC sliding sash (smooth white / cream) | €950 to €1,750 | €7,600 to €13,500 | Concealed spiral balances, tilt-in cleaning, Uw 1.2–1.3 |
| Woodgrain foiled heritage uPVC sash (mechanical joints) | €1,150 to €1,950 | €9,200 to €15,600 | Butt-jointed corners, run-through horns,Georgian bars |
| Engineered hardwood / Accoya double-glazed sash | €1,650 to €2,650 | €13,200 to €21,000 | Traditional lead/steel weights & cords or spiral balances |
Tilt-in cleaning, draught seals and Protected Structure rules
Modern replacement sliding sash windows eliminate the two biggest headaches of old box sashes: draughts/rattles (solved by triple perimeter brush and compression seals) and cleaning upstairs outside glass (both top and bottom sashes unclip on a safety restrictor to tilt 90° inward into the bedroom).
Planning note: If your home is a listed Protected Structure (or on a designated Architectural Conservation Area streetscape in Dublin, Cork, Limerick, Waterford or Kilkenny), replacing front-elevation windows requires a Section 57 declaration or conservation approval; non-listed period-style homes and rural cottages can upgrade freely to heritage uPVC or timber sash windows.
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Questions homeowners ask
Can new sliding sash windows stop street noise in a Georgian or Victorian terrace?
Yes — combining triple perimeter compression/brush seals with a 6.8mm acoustic laminated outer glass pane cuts urban traffic and pedestrian noise by up to 40 dB compared with single-glazed timber sashes.
Window replacement across all 26 counties
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