WERU Windows

The New Weru Alegra Panoramic Patio Doors

outstanding operating comfort and technology

The Weru Alegra sliding door is a Sliding a space-saving solution which is recommended for extremely large door openings. The precision guidance of the sash at the top and bottom means it can be opened and closed very easily. It also offers effective thermal protection, maximum air tightness, exceptional stability and reliable burglary deterrence. The lifting/sliding door already complies with the more stringent requirements of the German Energy Saving Ordinance of which the UK will move more closer to from 2025.

Technical features of a lift & slide door

Technical features of Weru lift & slide patio door

Safety Laminate Triple Glazing as standard for highest security and Energy efficiency. Down to Uw 0.78W/(m2K)
Burglary deterrence. Exceeds UK PAS 024 and SBD (secured by design) RC2, RC3
Maximum size 2 Pane 6mtrs.  3-4 Pane 7.25mtrs. Combinations up to 10mtrs + 10mtr +
High Acoustic Protection  Glazing Thickness up to 48mm 44 dB
Flush Threshold Option Yes
Can be upgraded to an entrance door (lockable with profile cylinder) Yes
Special Option Soft Close Function Yes
Air Tightness to EN12207 Class 4
Weather Rain Exposure EN12208 Class 9A


Weru Windows and hinged or sliding glass doors all look alike

  • Same quality expectations: very stable profiles, innovative technologies and ease of operation every time for decades to come.
  • Identical optional equipment: from thermal glazing through to burglary deterrence and home monitoring systems.  Integrated Blinds or shutters also available.
  • Consistent appearance in terms of colour and form. Why not make use of the large selection of Weru colours.
  • One-stop advice, planning and installation plus comprehensive services for lasting enjoyment of your windows and doors.

Highest operating comfort
Special steel-reinforced running carriages stabilise the sliders, which therefore  open  and close extremely easily due to the smooth-running operation.  Max weight up to 400Kg!  New options now available such as Soft Close Function.

Outstanding energy efficiency
The high-tech multi chamber profiles ensure all year round comfort.  Ultra Low U values and special Solar gain control help avoid overheating in summer and cold spots in winter.

Low Flush Threshold
The ingenious chamber geometry of the PVCu-aluminium Threshold ensures outstanding energy efficiency weather sealing without any frustrating step overs.


Enhanced living comfort
The special profile construction allows a glazing thickness of 53 mm to be used thus allowing a greater degree of thermal insulation, burglar protection and acoustic protection to suit any living situation in coastal locations or busy cities.

Outstanding air tightness
Special dual drop- down gaskets and seals on the centre closing profiles ensure outstanding air tightness and effectively keep out driving rain when the sliding door is closed.