award winning manufacturer of uPVC windows and doors since 1995

uPVC / PVC Casement Windows

Duraflex System , PVC Dublin, uPVC Dublin

Using the renowned Duraflex system DL Windows have been able to reproduce a large range of windows to suit every home. Duraflex is a leading brand name for Pvc-u profile being extruded in the UK. When buying DL Windows doors and windows made from Duraflex profile you are assured that your windows are free from defect and discoloration and will remain in excellent condition for a life time.

Duraflex profile comes with Q-lon seals that has excellent memory properties to deal with the Irish weather and together with Thermal inserts gives us A Rated windows. With intensive research we are now able to achieve passive windows using 40mm triple glazed units which gives us an overall u-value of .8. DL Windows have worked closely with Duraflex to bring to the Irish market the most advanced window system available. So when considering changing windows and doors it is worth giving us a call to get a quotation and to demonstrate Duraflex products.


All DL Windows casement windows - depending on your budget - can be upgraded to be fitted with Roto Bi-Directional Security Espag locks - the most advanced locking system on the market and also awarded the title Secure by Design. In addition, to compliment this lock, our side-hung casement windows can be fitted with hinge guards as an optional extra. This gives further protection as it prevents the possibility of the hinges being levered out with a jimmie-bar.

        Hinge Guards                          Bi-Directional  Espag Locks

Energy Ratings

The BFRC (British Fenestration Rating Council) is an independent body which is leading the development and application of window energy ratings. The Window Energy Rating label is similar to the EU label used on fridges, washing machines and light bulbs. It calculates precisely the overall u-value of the entire window, taking into account solar gain and heat loss through air infiltration as well as climate data. You can log on to the BFRC website at to verify any companies claims to be A-rated certified.

Contact DL Windows today for a more information or come and visit our windows and doors showroom and manufacturing facility in Clonalvy, Co.Dublin