If you have tar on your roof take the hat off, this should cure it. I know some will say what about the rain to which I would say what about it? During the winter my fire is continuously lit. Any water going down the chimney will evaporate before it causes a problems. When the fire is not lit it can be covered.
For a long time now my boat has been suffering from a surfeit of tar, both on the roof and inside the ceiling and dripping on to my stove. Last year I bought a new collar and arranged for a friend to fit it, but ran out of time during the summer. This year I was determined to get the roof fixed. I was thinking to remove the old collar reseal the flue and fit the new collar. We all know things are never as simple as that,
What you may notice is, the top of the flue is inside the bottom of the collar in the right hand picture.
Here, where the flue comes out of the roof ,there should be at least 3 maybe 4 inches of flue above the roof level. How long it has been sheared off is anyone’s guess, but I am thinking nearly eight years. Why do I say this? Well I have always had this problem.
Alex to the rescue! Alex is a bit of a genius. Steel is his forte. He trained as a shipwright. He can visualise a job and decide what needs doing. If you want to decide what you want and and Alex thinks it wont work Alex will not take the job. He will however tell you why not.
After removing the collar Alex wire brushed the roof to remove the rust. Midland Chandlers wanted £656 for a replacement kit from the stove top to the china man’s hat. We were not having that. I already had the collar. I had to buy the stove top fitting. This doesn’t come ready to fit. The ‘nuts’ which are just a piece of 1/2 inch bar drilled and tapped were an extra £2.40 each and the fitting screws were £1 each. Total price £46+ The chimney was sourced at £26.40 from an independent engineering company in Carterton near Brize Norton. Mort Bones had a reducer. That’s the connection between the stove top collar and the flue. It took a day to get the bits together but Alex was able to complete the job in two days.
The roof had rusted badly and around the flue hole the 4mm thick roof was thinner than 2mm . To correct this a 500x500x4 mil plate was ordered was ordered at a cost of £70. I knew this was needed. The panel was fitted to the roof using an awful lot of screws and a copious quantity of sealer after first having the collar mounting bolt heads welded on the underside
The stove top collar was fitted and sealed to the stove (after Alex routed out the channel with a broken drill bit)followed by the the reducer,
I was left to finish off the sealing and making it smooth for the undercoat. Only the top coat to go now. I am going to paint a black band right across the roof in case the tar comes back, but I doubt it will.