Now it's raining. Let's see if they can continue backfilling today (the soil is very clayey and when it gets wet, it's good for compaction, if it's already where it is, but bad if you have to bring it there first)
Do you have special forces working? Compacting wet clay soil is an impossible task, or have you ever tried compacting pudding? Regarding backfilling: It is even very sensible to backfill again with the same material (especially in clayey environments), because with replacement material you otherwise create a beautiful bathtub around your house. The native terrain is still clayey and does not absorb water well. Rainwater would inevitably accumulate in the bathtub because it seeps into the replacement material but then cannot escape. So actually not what you want, regardless of whether it's a waterproof or wooden basement. And this dumping nonsense also gets on my nerves. Our architects always ask on their other construction sites (or those of the structural builder) to reuse excavation material almost entirely because the dumping sites want to inspect every little crap, which costs unnecessary money. So everything done right
What is it useful for? Be careful that no puddles form. I recently had a pool in the garden with a waterfall. On the compacted clay soil, nothing drained at all.
The windows are made of white plastic and we live in a bad weather area. That’s why we liked plastic matching the windows and being easier to maintain better.
However, at least for the front door, I would always choose aluminum instead of plastic.