Aluk Reviews 

ALUK appears to have no interest whatsoever in quality control over their fabricators.
Disclaims any responsibility for blatantly false advertising in the brochures they provide to their fabricators.
Result is the mis-selling of unfit for purpose, non building regs compliant products.
Avoid like the plague.

1/5 Stars - Flawed patio door design and zero technical supportI am highly disappointed with both AluK’s product design and their non-existent technical support.I had an AluK aluminium patio door installed 8 months ago and have faced ongoing leak issues ever since. Both my installer and the frame manufacturer blame the AluK system itself for these faults.To get clarity, I contacted AluK’s technical department on 21 May via email and their online form. I asked a simple question to confirm if the external sealing is the primary weatherproofing and the internal sealing is purely for draughts and cosmetics. I followed up on 22 May to confirm receipt, and it is now 27 May with absolutely no reply.The product has major design flaws. The drain hole inserts feature a ball valve that sticks with the slightest amount of everyday atmospheric dust. Furthermore, the internal plastic bottom track holds water instead of letting it exit freely through the drainage holes. AluK's complete lack of phone support and failure to answer a basic weatherproofing email leaves both customers and installers completely stranded with a flawed, leaking product. Avoid.