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Old 01-11-2012, 18:43   #16
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We bought plastic snaps from sailrite that are glued to the aluminum hatch frame. These snaps come with a strong adhesive on their base... It works great!

Here they are:
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Old 02-11-2012, 04:50   #17
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Re: Hatch Covers

Clingwrap is a handy and cheap solution to condensation problems on I hear.
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Old 02-11-2012, 06:27   #18
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Re: Hatch Covers

When I made our insulated Sunbrella hatch covers I ran a draw string inside a pocket at the bottom and simply draw it up to secure. This works because the Bomar hatch sits proud of the deck with a recess area between the hatch and deck.. Flush hatches might not work...

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Old 02-11-2012, 06:52   #19
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Re: Hatch Covers

Covers are good for UV an somewhat for warmth, but storm window are better and potentially easier (varies with the hatch). Just cut a rectangle of 1/8-inch acrylic to fit the same space the bug screens fit. Further, they still let light in on nice days, important in the winter, when a boat can feel like a cave. I use both, and they really help when the temperature goes below freezing.

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They are frameless and nearly invisible.
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Old 02-11-2012, 06:59   #20
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Re: Hatch Covers

probably made a hundred or so over the years, and what we've found easiest to make, take off, and replace is a fitted cover with a 1/4 inch shock cord around the edge..
on some of the newer powerboats, the hatch fits snug against the deck and wont allow the cord..
on those, we wrap the lower edge of the hatch with "Velcro" and sew in the oppisite side in the cover..
the issue with most is they dont fit the hatch snug.. wind gets under them and they blow off..
we have made some in strech material and they looked great but didnt last to long in the sun..
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Old 24-08-2013, 16:31   #21
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Re: Hatch Covers

Some posters said they want to avoid screwing snap fasteners on hatch frames because of dissimilar metals. Is this because of potential galvanic corrosion? Don't the metals need to be immersed in an electrolyte (e.g., sea water)?

I just checked my mast and everything attached to it is screwed on with stainless steel screws. I've heard it's better to use rivets for that, and now I'm thinking it should be aluminum rivets, not SS.

There'll be spray on the hatches, providing the needed electrolyte, but is this really the concern?

Am I missing something?
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Old 24-08-2013, 16:38   #22
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Re: Hatch Covers

foggy sea air has salt in it. you do not need water to fuse aluminum and ss. i promise.
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Old 24-08-2013, 17:36   #23
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Re: Hatch Covers

If its warmth ya want, or keeping heat and sunlight out, try cutting some 3 in foam to fit tight inside the hatch when it's closed!! Really helps a bunch and is cheap as heck !! all ya need is foam and a electric knife, and ya got some hatch covers, Inside!! Works for us, and they are easy to store when ya don't need em
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Old 24-08-2013, 19:01   #24
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A slightly different approach:

The forum site sells them.
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Old 24-08-2013, 20:26   #25
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Re: Hatch Covers

The nicest ones I have seen use three pieces of an extrusion (either PVC or aluminum) which will accept a bolt rope wh
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Old 24-08-2013, 21:34   #26
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Re: Hatch Covers

The three lengths of extrusion get fastened to the deck outside of the hatch, fit the bottom of the "U" in first, then the two legs. With a nice snug fit on the hatch cover the last side lays tight on it's own. I'll try to find a picture and pass it along, makes for a very clean looking installation.

PS try an anhydrous lanoline like Lancote to reduce corrosion between stainless and aluminum.
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Old 25-08-2013, 10:22   #27
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Re: Hatch Covers

Yeah, I wouldnt screw snaps etc to aluminum hatch frames if that's what your asking. put your snaps on the deck and make your cover accordingly. Done carefully and well I supposed you could do it, depends on your hatch frame. Screws on masts get corroded in place very quickly and cannot be removed without breaking them off. This can be avoided by using Lanolin or other things.
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