He found + present/past tense

Please advise me on this - Imagine, A and B are two friends.

A says to B : "You go to Sam's room and see if Sam's sleeping."
B : "Okay"
B leaves and find that Sam's room is closed. 5 minutes later B returns and tells A about Sam room.
A: Did you go there ?
B: Yes I went there and I found that Sam's room is closed.

Is 'is' possible in the above sentence given the fact that B knows that Sam's room is still closed at the time of speaking to A.?

P.S. If the sentence were like -

He found that he lives in England.

He found that the sky is blue.

In these examples I'm aware that the present tense can be used because its a permanent action. (Living in England is permanent and the sky is and always be blue)

But in the sentence "I found that Sam's room is closed."
Here Sam's room will not be always closed, probably it will be opened after few hours, few days. So its a temporary action. So by this logic "is" seems incorrect.
But at the time of speaking to A, Sam's room is still closed and B knows it for a fact. And by this logic "is" seems correct.

I'm lost. What would be your advice on it?

Thank You in advance.