Bow Hatch

Corrosion, Paint, Through Hulls, etc.
EWRice
Aluminum Star
Posts: 198
Joined: Thu Feb 04, 2016 12:37 pm

Bow Hatch

Postby EWRice » Tue Feb 28, 2017 5:14 pm

Does anyone else experience severe condensation buildup on the underside of their cast aluminum bow deck hatch? If so, is there a remedy for this? Mine is so bad that I have to lay plastic on the V berth bed to keep it from getting soaked.
Muskegon Lake
1972 32' Express flybridge
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson

javalin390
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Posts: 173
Joined: Sat Jan 10, 2015 7:14 pm
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Re: Bow Hatch

Postby javalin390 » Tue Feb 28, 2017 7:12 pm

Yes, same here. Par for the course I think. M's are like a cold beer can on a hot day, they get wet. Never really thought about a solution, just lay a towel on the v-berth when not in use. Anyone else?
Jim Elias
1974 37' SedanFlybridge
Twin 360 Chryslers.
Marblehead, Ohio

seef158
Tin star
Posts: 88
Joined: Sat Dec 20, 2014 3:49 pm

Re: Bow Hatch

Postby seef158 » Tue Feb 28, 2017 7:36 pm

I keep my bow hatch cracked on my boat, the way mine is set up I can open the hatch, put the latches to the closed position and set the hatch down on the latches. This allows for some air movement if you leave the window open in the door to the aft deck. The small air gap has never let any water in since ive started doing this. Of course this isn't a good idea if you don't trust your neighbors.
1978 28' express single 318
forest lake, mn
Duluth, mn
Washburn, wi

EWRice
Aluminum Star
Posts: 198
Joined: Thu Feb 04, 2016 12:37 pm

Re: Bow Hatch

Postby EWRice » Tue Feb 28, 2017 8:08 pm

I have thought about putting some sort of insulation on the bottom of the hatch. The previous owner had a piece of Styrofoam that he kept tucked in there, but I don't think he ever used the hatch. He never left the dock and always had the ac running. First thing I do when I get to the boat is open that hatch and all the windows.
Muskegon Lake
1972 32' Express flybridge
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson

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BayfieldMarinette
Member
Posts: 13
Joined: Sat Feb 04, 2017 10:47 pm

Re: Bow Hatch

Postby BayfieldMarinette » Tue Feb 28, 2017 8:15 pm

Does running the AC help to reduce moisture in the boat?
1978 Marinette 37' Double Cabin.
440 Chrysler's, 6.5kw Onan.
Bayfield WI.

EWRice
Aluminum Star
Posts: 198
Joined: Thu Feb 04, 2016 12:37 pm

Re: Bow Hatch

Postby EWRice » Tue Feb 28, 2017 9:20 pm

Yes, AC pulls alot of moisture from the air.
Muskegon Lake
1972 32' Express flybridge
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson

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carl
Royal Aluminum Star
Posts: 218
Joined: Sun Feb 08, 2015 5:58 pm

Re: Bow Hatch

Postby carl » Wed Mar 01, 2017 12:09 am

My Bomar aluminum bow hatch sweats with condensation as well sometimes but not always, depends on the weather. I take a few different approaches to this problem depending on what I'm doing.

Whenever I leave the boat for any extended time I too lay a 4' x 4' sheet of thin plastic on my V-Berth (remember I got that new custom made Murmaid mattress I need to protect). Then I plug in two Davis 1458 Air-Dryr 1000 (see picture), one on the V-berth floor and the other on the galley floor, no moving parts, very low amp draw and the boat is always fresh and dry upon my return. If I'm onboard for any extended time and its humid I run the air conditioner or I bring in my small dehumidifier, the dehumidifier is actually quieter than the AC and it gets the entire cabin comfortable, sucks out all of that hidden moisture in the boat.
Attachments
Davis 1458 Air-Dryr 1000.jpg
1990 Marinette 32' Sedan Fly Bridge "IKOI"
Twin Crusader 350's (Closed Loop Cooling)
Bow to Stern Full On Restoration in Progress
Chickamauga Lake, Tennessee
A boat is always safe at shore, but that's not what its built for...

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carl
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Joined: Sun Feb 08, 2015 5:58 pm

Re: Bow Hatch

Postby carl » Wed Mar 01, 2017 8:59 am

Here is another item I am installing in the ceiling of my head over the shower/toilet area. It will help move air which is key to keeping our boats mildew free. This solar powered vent is often installed in the front hatch, something to consider.
Attachments
P1060005.JPG
1990 Marinette 32' Sedan Fly Bridge "IKOI"
Twin Crusader 350's (Closed Loop Cooling)
Bow to Stern Full On Restoration in Progress
Chickamauga Lake, Tennessee
A boat is always safe at shore, but that's not what its built for...

ddependo
Aluminum Star
Posts: 170
Joined: Mon Jul 14, 2014 10:00 am

Re: Bow Hatch

Postby ddependo » Wed Mar 01, 2017 9:59 am

I put a piece of foam covered with sumbrella between hatch & screen. It insulates from heat & cold and I* don't get condensation
Wayne.
1973 32 express fly bridge
Chattanooga
"Southern Lady"

EWRice
Aluminum Star
Posts: 198
Joined: Thu Feb 04, 2016 12:37 pm

Re: Bow Hatch

Postby EWRice » Wed Mar 01, 2017 10:22 am

ddependo wrote:I put a piece of foam covered with sumbrella between hatch & screen. It insulates from heat & cold and I* don't get condensation
Wayne.


Do you have it fastened to the underside of the hatch, or just set on top of the screen? Making a nice looking vinyl covered foam insert and mounting it to the hatch is what I was looking at doing.

I belive my hatch used to have a power vent that was removed and blocked off. I thought about putting one back in, but I regularly run in lake Michigan with waves over the bow. I wasn't sure how well they would keep out water hitting like that.
Muskegon Lake
1972 32' Express flybridge
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson