Re-bedding the porthole
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In our quest to eliminate leaks it was time to tackle the galley
porthole. For you non-sailors, a porthole is a window that can be
opened. A portlight is a window that cannot be opened.
The originals were replaced by the previous owner with polished
stainless steel portholes from ABI.
After removing the porthole we found that there was only a half inch
of plywood and fiberglass between the frames. This had made it
necessary to use half inch #12 screws to hold them in place. The
leak had caused an area of the plywood to soften and some of the screws
would not hold tight. After giving it a lot of thought and
checking other boats it was decided that the solution was to build a
frame to build up the area to have a thicker base to seat longer screws.
My first idea was to use a solid board and cut out the opening and
then trim and shape the edges to match the porthole shape. It was
decided to use mahogany instead of teak due to price. Mahogany is
three times cheaper then teak. I bought two pieces of 13X24X1 inch
to allow for problems and I will also have to do the aft cabin porthole
later.
After a bit of cutting, sanding and varnishing it was ready to be
installed. Unfortunately it didn't work. By using a solid
piece of wood the grain was all running in the same direction.
Unfortunately when I installed the screws on the sides they split the
frame. That one went into the trash and there was a lot of caulk
to clean up.
Time to start over.
The second try was to to cut four pieces and build a frame.
After a bit of cutting, gluing, shaping, sanding and varnishing I had
another frame ready to install. This time the installation went a
lot smoother. The added thickness allowed the use of one inch
screws and I was able to get good purchase when seating the screws.
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