Welcome.
A picture of what it is that you want to build with aluminum would be helpful.
~Fishy
Ayuh,... I saw the picture before it disappeared,...
How big a door ya thinkin',..??
Are you thinkin' of doin' this yerself, or hirin' it out,..??
How Handy are ya, 'n how big is yer toolbox,..??
Welder,..??
There's several ways to get where ya wanta be,...
The 2 big determining factors are time, 'n money,...
How much ya spendin',..??
I think it's called Nicor. It is (2) aluminum Sheets bonded with a honeycomb composite material sandwiched between, to form a unitary structural panel. It is strong and lightweight.
Oh,I see.
I mistook your boat for glass...
If its the water your worried about you could maybe keep it out by ways of a ledge on the deck,
I used lexan(plexiglass) but for security as you mentioned safety glass would be the way to go.
I mike