Established 30 years McIlhatton and Company Limited are Northern Ireland's foremost manufacture of double glazed units and PVC-U windows, doors and conservatories. All manufactured to British Standards We offer an extensive range of products and services to both the home and commercial sectors of the economy backed up by a 20 year guarantee. Whether you are contractors doing industrial or commercial construction, or a private owner doing residential home renovations, McIlhatton & Company Limited manufacturers the windows for you