If you have identified a problem that may affect the structural integrity of your building, such as movement in a wall or roof structure, you may need to seek advice from a structural engineer.
Os ydych wedi nodi problem a allai gael effaith ar gadernid strwythurol eich adeilad, megis wal neu strwythur to sy'n symud, mae'n bosibl y bydd angen ichi gael cyngor gan beiriannydd strwythurol.