McMullanODonnell is a leading window and door supplier in Northern Ireland and Ireland, offering a comprehensive range of domestic and commercial PVCu and aluminium windows and doors, designed to provide excellence in performance, security, long life, reliability, and low maintenance.
Customers have praised the company's excellent service, high-quality products, and professional staff, with many describing their experience as "outstanding" and "amazing".
One customer reported a negative experience with the company, citing installation errors and a lack of response to their concerns.