correct relative pronoun

[Jenniesue]

What is the correct relative pronoun (I believe this is the correct term) for a sentence like: The house _____roof is on fire is my best friend's. If the subject of the sentence were a person I know it would be "whose", but it seems strange to use this word with "house"

thanks in advance for your help

[Yankee]

Hi Jenniesue

The word 'whose' is used to refer to both animate and inanimate nouns.
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