​Richard Singleton can supply and fix almost any part on most window and door systems installed over the last 20 years. Most common faults include the misting up in between the Double Glazing Panels as well as the locking mechanisms, handles and hinges. We can also fit new letterboxes, fix additional security locks including child safety locks to existing windows and new rubber seals to replace perished or shrunken existing seals. If we do not have any item in stock we can have it delivered in 24 hours.