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Window refurbishment

Front of the newly restored Dun Laoghaire Baths on a sunny day. A one-story period building painted white. Two sets of two sash windows on either side and a period Georgian door in the centre with a fan light above it. All made by Bolger Sash Windows. Two low granite steps from the footpath up to the door. Low granite wall with white railings on either side of the steps that have a granite pillar at the end of both.

Sash and casement window refurbishment

Bolger Sash Windows is Ireland’s market leader in restoration and performance upgrading of existing sliding sash windows. Drawing on over 100 years of experience and expertise we can completely renovate almost all period sash windows, on site, and improve their original quality. Our workmanship enables our clients to retain their unique, valuable, architectural feature in its original form, remaining true to the timeless style of the property.

Our skilled team repair or replace any areas of rot, and with the introduction of a high-performance draughtproofing system your windows will:

  • Be draught proof
  • Be energy efficient
  • Slide up and down easily
  • Add value to your property


We have been repairing and draught proofing existing sash windows since 1988.

Stages of a typical sash window renovation project

After your initial enquiry with our office we will follow up with a detailed inspection of your windows together with a written report and estimate. This service is free of charge in residential circumstances.

Ordinarily with commercial projects there is a report fee which is waved upon the awarding of the project.

Work to your windows will be carried out by a team of experienced carpenters on site and will include:

  • Fitting a draughtproofing system
  • Replacing sash cords
  • Rebalancing weights
  • Replacing staff beads & parting beads
  • Repairing or replacing frames and sashes
  • Ensuring easy sliding action
Front of the newly restored Dun Laoghaire Baths on a sunny day. A one-story period building painted white. Two sets of two sash windows on either side and a period Georgian door in the centre with a fan light above it. All made by Bolger Sash Windows. Two low granite steps from the footpath up to the door. Low granite wall with white railings on either side of the steps that have a granite pillar at the end of both.

Sash windows

Photograph of the front of a period property with a brick facade and back panelled sash windows with a matching back period front door.
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Casement windows

Photograph of a Dublin period home red brick facade featuring new white double glazed casement windows with granite windows sills.
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Period joinery

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Visit our gallery to see more of our work