When a tenant is disturbing another tenant in the house, the landlord can serve that tenant with a legal notice (Form N5- Notice to End your Tenancy For Interfering with Others, Damage or Overcrowding ). This notice is a 20-day notice where the landlord has to describe, in detail, what the problems are and when they occur. The tenant will then have seven days to correct the situation, otherwise the landlord can file an application with the Landlord and Tenant Board to go to a hearing and seek termination of the tenancy. Based on all the issues you have described, the Form N5 would be the appropriate notice to serve the tenant. Forms can be obtained from the Landlord and Tenant Board’s website at https://tribunalsontario.ca/ltb/forms/