Anyone here have any experience fitting window films? It can be a fairly profitable business and is just the sort of sideline a decorator could get into being as a lot of skills would be transferable.
If you are already in the customer's home as a trusted tradesman, it's the perfect opportunity to upsell another service. Films can be tinted, added security, have graphics (house numbers?), and insulating. You would just need to get friendly with a local supplier and maybe attend a course?
Just an idea