When the Edge of a Mat is Impure

Q: Salaah-108: A child had urinated on the edge of a carpet. Is it permissible to spread out a sheet on the other part of the carpet and perform salaah there?

Answer: Without any problem, it will be permissible to perform salaah on the other (pure) portion of the carpet, whether with or without spreading a sheet over.

Fatawa Rahimiyyah vol.2