DE38 Windsong Making and Installing the Large Cabin Windows

By Eric of Windsong,

AT LAST…the big windows are FINALLY in!  This is a huge step for me, as this particular project was much more involved than I ever expected it to be, and was a crucial step to sealing up the boat.  Windows, ports, portlights, deadlights…they have many names; but for now I will just refer to these as windows.

Long time readers of the blog will know that I’ve pondered the question long ago what I will be doing with the large cabin windows.  The original ones were very thin acrylic with cheap plastic frames and barely sealed in.  They leaked, they cracked, they were overall unsuited for offshore work as I’ve read a few accounts of DE38 windows breaking easily under the pressure of waves.  These windows needed an upgrade for safety as much as appearance.  I pondered the choices for replacing the windows long ago here:

Since then I have pondered further, and after much research I finally settled on the materials and the method for installing.  In the end I decided to make my own windows out of tinted cast acrylic, installed using a fastener-less method with Dow Corning 795.  I won’t re-write what has already been written on the subject, so I will just link you to the most important pieces I found that summarizes the research:

1. Maine Sail (link), renown guru of all things sailboats summarizes the choices between lexan and acrylic (plexiglass), the various sealants and methods of installing including the recommendation for not using fasteners.  here:

2.  This is an article that many people reference for installing fastener-less windows, aka “Sexy Windows” (click here for original Cruisers Forum discussion).  The author originally uses heavy duty 2-sided tape for the installation, but in his notes at the bottom he mentions the current trend of not using the tape, just the sealant:

3.  This is a great article someone pointed me to that details the method of installing the windows using temporary screws to affix them while the sealant dries.  I followed these instructions with a few minor variations.  I detail some of my installation variations in the picture captions below.

Using those three links as the basis (and much more forum and article research), I went ahead with creating my windows.  Unfortunately, this project was a great example of how order of operations creates big problems.  For example, before any windows could be installed, I needed to settle how I will be rebuilding the cabin liner because otherwise I wouldn’t be able to trace out the window openings.  That process itself was a huge project because I had no idea how I planned on doing the cabin liner, so I had to make a lot of final decisions in the process.  I will write that process up once I am further down the line on it, but will preview it below in the pictures.

At last these windows are sealed up, and a lot of progress can now be made inside the boat.  The boat interior was practically outside and exposed to the weather since those windows are so huge.  Now I can finally keep the interior clean for projects that require it, and am no longer at the mercy of the weather to work inside the boat.

As with my last few posts, below are a bunch of pictures with the story in the captions.

To see more of Eric and Windsong visit

Print Friendly