I'm currently unable to repair my roof or floor by using my hotkey, and no event is generated by attempting to do so. I can repair items in my inventory, building walls, crates and such, or at the very least the game acknowledges that I told it to do so when using the hotkey (generates event "You cannot repair ___ with that.", or begins repairing for example.)
Roof type: Wooden
Floor type: Wooden (building)
Materials attempted to trigger repair with: Plank (expected response: commence repair), hand (expected response: Event: You cannot repair the roof with that)
Also note: Improve hotkey works correctly for both roof and floor. Repairs can be commenced normally by right-clicking and selecting repair.
Version: Wurm Online 3.99h-7626
OS: Windows 7 Home Premium 64-bit (6.1, Build 7601)
Java version 8 Update 65 (build 1.8.0_65-b17)