What's under my stairs carpet please?

[Ihavenobrain]

I live in a fairly new house. It's about 20-25 years old.
What would be under my carpet?
And could it be painted?

[wowfudge]

You'll have to lift it to check. Likely to either be floorboards or possibly mdf treads, but don't take my word for it as I have no way of knowing!

[Barneskb]

I agree. It's probably just floorboards. But you will find out once you lift the carpet. If it's just floorboards then painting them wouldn't look good.

[MehsMum]

Downstairs, quite probably concrete.
Concrete, smoothed, painted and polished, can look fab but it's bloody cold - great in the tropics, less so in Blighty.