award winning manufacturer of uPVC windows and doors since 1995

New AP400 Aluminium Lift & Slide Patio

D.L Windows are delighted to introduce the new Advanta Lift & Slide door - AP400 to our current range of products.

Aluminium Lift and Slide Door

1.   A totally vertical lifting mechanism

2.   Less effort needed in lifting and sliding large doors.

3.   Bespoke reinforced resin wheels for near silent operation.

4.   Zinc plated metallic operating system for additional corrosion resistance.

5.   Multi-point high security locking system with optional night latch point for ventilation.

6.   Polyster Powder coated finish (PPC) to any RAL colour


In terms of sustainability aluminium is one of the best material available.  Its natural strength, lightness and durability makes it the ideal material for meeting architectural glazing requirements.  For our own production we use recyclable aluminium billet 100% of the time and all production waste is recycled.  Our extrusioins carry a life expectancy of over 50 years.

Advanta Lift & Slide door AP400

Energy Performance

The AP400 polyamide Lift and Slide door system has a 24mm polyamide thermal break as standard.  With all optimum thermal profile performance and combined overall U-values exceeding and complying with current Building Control regulations.