Greetings all,

I'm looking at replacing some windows in our lounge with a sliding/stacker door and am keen on hearing your recommendations/advice.

Total size will be approx. 3350w x 2100h, it will be 3-panel (3rd panel is windows), installed in standard 2x4 framed external wall (have council consent already) in our 1960's weatherboard house.

We've just fully re-gibbed the entire house and insulated all walls with PinkBatts R2.8 so we're wanting to get good heat-retention with the new door too - so it will be at least double glazed.

I'm mostly after opinions on: uPVC vs Aluminium, Argon filled vs standard (worth the extra price), and any companies you would recommend (for quality and price).

A mate installed a similar sized one about 18 months ago in Blenheim (basic double glazed) and he swears it cost him around $2,500, but all the quotes we've had (we're Wellington based) for basic double glazed are around the $4,500 mark.

Any advice would be appreciated.