Double Glazing Northern Ireland

Our double glazed windows come in a full range of styles and colour choices available to suit everyone. They are designed to offer better home’s security, appearance and energy performance giving our customers peace of mind.

  • MuMullanODonnell Double Glazing

    Whether you are thinking about double glazed windows MuMullanODonnell can help. According to the British Fenestration Rating Council, an average, semi-detached house can reduce 18% of energy usage (or 0.30 tonnes) by investing in double glazed windows.

    Every MuMullanODonnell double glazed window is designed to fit perfectly. No matter what style your home is, or the type of window you are looking to replace, you will find a beautifully crafted double glazed window to match,

  • Advantages to Double Glazing

    • Smaller energy bills.
    • Smaller carbon footprint.
    • More comfortable home: energy-efficient glazing reduces heat loss through windows and means fewer draughts and cold spots
    • Peace and quiet: as well as keeping the heat in, energy efficient-windows insulate your home against external noise.
    • Reduced condensation: energy-efficient glazing reduces condensation build-up on the inside of windows.