Does anyone know what the landlord is supposed to do when construction will be occurring on the premises? Based on what I've read, written notice has to be provided 48 hours in advance?
Give them at least two days notice. Keep it short and professional. There's no need to apologize, ask permission, or make financial concessions. You have a right to maintain your property and the tenant must give you access. Try to be accommodating to their schedule, try not to make a mess, try to respect their right to quiet enjoyment.