Office Cleaning Services Window and sign cleaning Stuart Ball Windows offers the cleaning of shop signs and internal and external office windows, providing a first class job which will enhance your business. Office cleaning We also provide office interior cleaning. From hoovering to polishing, we have it covered. Stuart Ball Windows is fully insured to give you peace of mind. Serving the local business community Stuart Ball Windows is based in Norfolk and serves the towns of Diss, East Harling, Thetford, Watton and Attleborough as well as all the villages in between and the surrounding areas.