Hopefully the last part in the series. After our chilly evening sail, I realized that I had some improvements to make.
- Add Barometric damper to “dampen” the wind gusts coming down the chimney pipe.
- Fiberglass a pad for the chimney top to sit on that is level with the deck.
- Cut chimney pipe to fit with the damper in place.
The first step was to run out and pick up a barometric damper.
These are not cheap coming in at bout $60! Let’s face it though, sailing here in the PNW without heat on-board is pretty miserable and that $60 seems trivial when you are cold and wet. Also, when we depart in September it will be nice to have warm dry heat en route to San Francisco.
The next step was to glass a chimney pad. This was probably the most time consuming portion of the whole install. I have never tried to make odd shapes out of fiberglass before, so there was a bit of learning involved here, but I figured it couldn’t be that hard.
I started by measuring the deck fitting (7″ in diameter) and searching for a bucket with rounded bottom edges to use as a mould for my epoxy. It turns out that the pain mixing buckets were perfect, 7.5″ in diameter, and the edges were nice and rounded.
I waited for a nice dry morning and went out with a piece of paper that I had previously wrapped around the bucket to size and drew the deck curvature onto the paper. I then scribed that shape onto the bucket and cut it with scissors. The resulting shape was test fit to the deck curvature and I used a level to check to see how well it fit.
The photo above shows me test fitting after I glassed over the bucket. It turned out that the deck fitting was too short to reach the disctance of the new pad, so I had to trim 1.5″ off using my dremel. I then mixed up some thickened epoxy filler and epoxied the mould into place. I then cut several small pieces of fiberglass and glassed the pad into place on deck.
The end result came out pretty well. Its structurally sound and after a bit of sanding and paint, you won’t be able to tell it wasn’t original!
I then used the dremel to cut the chimney pipe and the guard to fit below the damper. Here is a look from the interior.