- Aug 23, 2016
- Newburyport, MA
- First Name
- Boat Make
I agree with everything said on this post and would add this. I recently faced a tough decision on my top. It was made by Terry and he used scored divylcell. I'm not positive as to the thickness but can't be more than 3/4".
I was going back and forth on the top as head room is minimal. I'm not sure about the fit of the 6.7L cummins, angle of install even with the ZF280A. It seems it sits quite high in the bilge. I have about 5" of clearance from the bottom of the oil pan to the drip pan. Not complaining about this but it does raise the deck a little to avoid an engine box. As it is right now I barley have 11" from the projected waterline to the bottom of the turbo.which I will have to deal with. Not to derail the post with my problems but I have decided to go with it as is for now as I will not have the time to redo the top even though this would be the perfect time to do it.
Back to my top as mentioned above it is scored H80. It does have a definite "oil can" effect walking on it ever so carefully. And I would not consider walking on it without supporting the aft portion. So, if I were to do this I would probably lean towards 1" foam. As it makes seams and edges much easier to deal with on a one off project It is simply a matter of choice as I have used a lot of both carbon core and foam as each have it's advantages. I would avoid the scored for a couple of reasons.any solid foam or honeycomb will readily take to whatever camber you decide on.and, would be much stiffer than scored. You would also be using albeit slightly less resin filling in the "cracks".
And, as time intensive as it would be, I would build a mould to properly lay up and achieve the look and shape you want. I would also add hot coating the core before applying it to the first layers of glass. I ground the gunnels to prepare for some coaming in the cockpit and came across quite a few areas of "dry" core with no resin/glass contact. In fact I would hot coat the core and spread a slightly thickened resin before placing the core in the mould. And yes Merton's sells scored and non scored H80 as well as coosa and is a great source for advice.Just my two cents
What's the rough overall size of your roof? my current balsa core roof had a little flex to it when walking on but also had a winterback so its supported.