Contact Masonside Blinds & Drapery - window treatment experts in Muskoka, to know more about commercial and residential window treatment services. Design Centre Hours: Mon - Fri 10:00 am - 5:00 pm, Saturday 11:00 am - 4:00 pm, Sunday Closed Masonside consultant Saturday 11:00 am - 2:00 pm showroom hours or by appointment. Shop at Home appointments available Sunday - Monday by appointment.