In message
Tim Lamb wrote:


[snip]

Have a look for an approved fabricator for Schuco or Reynaers systems.
IIRC they both offer slim sections.

Top hung should be fine, but may require restrictors to combat the
danger of a fall hazard. Have you considered tilt and turn?

Friction stays on higher end systems are better engineered. I agree many
resemble meccano, and appear flimsy.

Personally, I detest uPVC. It creaks and groans in hot weather, and
whilst staying white, the gloss does degrade. Good aluminium is robust,
and you have the options of a huge range of powder coat colours if
required.

HTH
--
Jim White
Wimbledon London England