Wooden deck on composite subframe

[Gsenior]

Hi, I have a concrete slab in my garden which I’d like to put a deck on.

I’m thinking about building a composite subframe, which I’ll drill into the concrete, and then laying timber decking on top.

My thinking is that a composite subframe won’t rot down if water sits on the concrete, but I prefer timber decking for aesthetics and reducing plastic in the garden.

Has anyone built a deck like this?

Can I just screw the timber decking boards directly into the composite joists?

Any foreseeable issues?

Any tips?

Thanks