Properly sealing the basement (bitumen)

Hello,

I want to properly waterproof my basement, which is made of cast concrete. I got some bitumen roofing membranes from an acquaintance who had some left over from his construction project.

He said it is okay to just torch them onto the concrete floor in the basement.

Now I have some questions that couldn't be answered:

1. Does/should the floor be primed beforehand?
2. What advantages do bitumen roofing membranes with aluminum actually have? When are they used?
3. Should the membranes overlap a bit on the walls (upwards), or is it enough to just cover the floor?

Regards!

Anyone who asks such fundamental questions should not do something as important as sealing themselves.

You won't get any information from me, and that's for your protection...

If you want to do it yourself then better take something like a Katja Sprint ...

If you want to do it yourself, better take something like a Katja Sprint ...

Start first with the question, why does he want to waterproof the basement? Is it technically necessary?

I have clarified and done it with the architect. Thank you for the help.

And the result was?