An entrepreneur installed Velux roof windows. Half a year later, I hired another entrepreneur for the job of getting a new roof. This job went through a tinsmith, who in turn hired a carpenter for everything except the metal work.
To fit the already existing windows to the new roof (benders concrete tile), the roof windows were raised slightly, new collars and some details were purchased by the carpenter to make this work well.
Windows were installed in the summer of 2008 and the roof was redone in the fall of the same year.
Today it rained here in Skåne. Snow and cold have stayed away for a week. To my dismay, I discovered a small trickle of water running from my slanted ceiling along the wall. The bottom edge of the roof window ends about a meter higher up, so presumably that's where it's leaking from. Above the ridge, it's also sheeted for the dormer on the other side. Building plastic can indeed transport water a long way. The trickle stopped when it stopped raining, but presumably the insulation has absorbed water and taken damage somewhere.
But how should I proceed? Of course, I will contact the tinsmith and demand they/carpenter troubleshoot and fix it. What kind of guarantees are usually there for this type of work? (I've cleaned away the offer) Do you think they will also cover tearing down, replacing the ceiling, insulation, etc.?
Should I start tearing down the ceiling myself, or should I leave it to them? It might facilitate troubleshooting, etc. Should it be reported to the insurance company, even though they apparently don't cover this type of damage?
If there are issues about money, does this fall under the ROT deduction?