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Double Glazed Units

At O'Neill Glass Portlaoise are experts in Double Glazing, with over 30 years experience in the industry.We are proud to have built our business up on the double glazing industry.

Our Double Glazed Units come in various thicknesses, from 8mm to 28mm in thickness. There is not a standard thickness with double glazed units each window frame has its own varying thickness. If you are confused with the measurement and thickness of your double glazed unit getting a professional like ourselves is the best way of getting an accurate double glazed unit. Contact us.

Eco Friendly Double Glazing

All of our Double Glazed Units are A rated Argon Units using Low-E glass (90% argon gas filled with warm edge spacer bar).The Double Glazed Units have a U value of 1.2W/M2k and have a thermal performance of up to 130% over normal double glazing.This figure is well within the maximum U-valueof 2.2W/m2k required under section L of the Second Schedule of the Building Regulations 2005 and as amendied by the Building Regulations 2007.

Safe Double Glazed Units

We at O'Neill Glass make sure the requirements of you the customer are foremost, double or single glazing in front doors, side panels at front doors & back doors has to be toughened by Law.

We cannot give you ordinary non toughened glass for these double glazed units.


Our Double Glazed Units can be made with clear glass or obscure glass for privacy.

We have a wide range of obscure glass to choose from each with different levels of obscurity. We also make decorative double glazed units to add a touch of class to your front door, front door side panels, conservatory, etc. We can make any design in our vast collection of decorative glass into double glazing.