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Old 22-06-2013, 09:05   #1
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Installing a dorade box details - questions

I've just recently scored a set of brass cowel vents, check here for that story http://sv-harbinger.blogspot.com/201...owl-vents.html and now have the dorade boxes. I'm a little curious as how I mount the box to my deck?

I've considered simply drilling wood screws into the base of the box (about 3/4" thick at the bottom) but would I be ale to screw into it accurately I am not sure. I've considered making a wood frame that sits inside the dorade box but that's a lot of extra work.

How is your dorade box mounted?

What type of caulk should I use?

Any tips would be helpful.
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Old 22-06-2013, 19:31   #2
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Re: Installing a dorade box details - questions

harbinger we have a Gulfstar 37 and ours were attached by securing a rail on the inside edge of the long leg on either side of the box. then they were screwed down to the deck with poly sulfide under the edges (don't use anything like 5200 because you will destroy the boxes to get them off again). this is not the greatest set up, but worked for 30+ yrs. you would have to scribe the box to the deck before adding the rails, which I would think would take longer than adding a rail to either side. The boxes should have a baffle in the middle to stop/slow any water from getting to the deck opening(ie divided into equal halves).
I would think that trying to screw from under the deck up would be a pain in the butt
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Old 22-06-2013, 20:04   #3
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Re: Installing a dorade box details - questions

If you are talking wooden boxes going directly on the cabin top, mark the sides of the box on the cabin top, drill down through the deck 3/8" or so in from your marks, place the boxes back in place and have someone hold the box, go below and drill pilot holes into the boxes and screw from the inside though the predrilled holes. You only need to caulk around the screw holes. If you caulk all the way round, you'll seal the boxes to the deck and they could fill up with water. Best to cut a couple of limber holes on each side of the box base to let water out.

LifeCalk is my favorite but have also used butyl. Polysulfide caulks will also work but tend to be a bit sticky.
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Old 22-06-2013, 21:11   #4
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Re: Installing a dorade box details - questions

Thanks for the replies, good point about caulking the holes. I wonder if I countersink the holes then use butyl tape instead of polysulfide, it would work?

Stand by tomorrow ill attempt to do this weather permitting.
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