SlimGlaze by Rathmines Glass

Double Glazing for Traditional Sash Windows

Welcome to SlimGlaze Rathmines

With over 30 years of experience, SlimGlaze Rathmines is Dublin's premier provider of quality double glazed windows units for period houses and traditional sash windows.


SlimGlaze Windows are the very latest in double glazing and are specifically designed to fit in the timber frames of sash windows. SlimGlaze is slim enough to fit into the existing timber frames while still be a double glazed unit. This means that you can now upgrade your old, draughty windows without changing the traditional and charming look of your Victorian or Georgian building.


Based in Rathmines, we supply and fit SlimGlaze in all kinds of period houses in Dublin 6. With our own highly skilled and experienced carpenters, we guarantee high quality service at the most competitive prices.

Increased Heat Retention

Increased Heat Retention

Minimises Condensation

Minimises Condensation

Noise & Sound Reduction

Noise & Sound Reduction

Draughts Sealed

Draughts Sealed

Suitable for Period Buildings

Suitable for Period Buildings

Contact SlimGlaze Rathmines for More Information and Discover why SlimGlaze is the Right Choice for your Home

SlimGlaze Windows

SlimGlaze Windows

SlimGlaze Windows are there very latest in double glazing and are specifically designed to fit into the timber frames of traditional sash windows in older buildings.

Benefits of SlimGlaze

Benefits of SlimGlaze

SlimGlaze windows are extremely energy efficient. The double glazed units allow for better heat retention, reduce street noise, and eliminates draughts.

Our SlimGlaze Portfolio

SlimGlaze Portfolio

SlimGlaze Rathmines has worked on countless window restoration projects using SlimGlaze. Check out our portfolio to see our high quality work for yourself.

SlimGlaze Brochure

SlimGlaze Brochure

For SlimGlaze product specifications, sizes, dimensions, detailed information, and pricing, make sure your download the SlimGlaze brochure.

Frequently Asked Questions

  • Can traditional sash windows be double glazed?

    The timber frames on traditional sash windows are usually too narrow to fit modern double glaze units. That is where SlimGlaze comes in. The extra skinny double glazed units are designed exclusively for sash windows and are made to fit even the narrowest timber frames.

  • Why are double glazed units better than single glazed?

    Double glazed windows consist of two glass panels with an insulating gas filling the gap between them. This means that double glazed windows are much better for heat retention and energy efficiency. Double glazed windows allow for up to 77% heat retention compared to single glazed windows retention of 30%.

  • Can SlimGlaze windows be installed on listed buildings?

    Yes. Many of the period buildings in Dublin are under protective orders, This means that you are not allowed to alter the appearance of the building. SlimGlaze units fit into the exiting timber frames so you can upgrade the building’s windows without affecting the look or appearance.

  • Do you install SlimGlaze as well as supply?

    Absolutely, At SlimGlaze Rathmines we supply and install SlimGlaze windows. We have our very own technicians and carpenters so we can provide a high quality service at the most completive prices. For pricing information please contact our team directly.