wrote in message
...
I have a houseboat whose roof has a bunch of thin
spider cracks, as well as some a bit bigger.

Is the roof structurally sound?

What you describe seems to be a bit of overkill if the basic roof is sound
and just needs to be made watertight. My houseboat came with a rubber
coating that has been working really well. Check out www.deckrite.com

Rod