The landlord did not fix a problem with the window, then water got in and damaged the tenant’s mattress; is he liable?

No File Exists
Check below answers in case you are looking for other related questions:
Can he rent the traditional set of jewellery and then return it to the jeweller in order to get married?
He rented a floor in his building for an Islamic centre, and they hold Friday prayers there and cause inconvenience to others

No File Exists
Related Answers:
After doing the job he demanded a large payment
Taking fees from children to look at animals and birds
Renting out dry-cleaning equipment to the worker for a monthly rent
Can he rent the traditional set of jewellery and then return it to the jeweller in order to get married?
He rented a floor in his building for an Islamic centre, and they hold Friday prayers there and cause inconvenience to others

Recommended answers for you:
Istikhaarah prayer
Why is the apostate to be executed in Islam?
Ruling on jihad and kinds of jihad
Islam and slavery
Prohibition on keeping dogs except those exempted by sharee’ah