Boat Building Forum

Find advice on all aspects of building your own kayak, canoe or any lightweight boats

Re: Material: BP screw in hatches sealing
By:JohnAbercrombie
Date: 2/9/2015, 1:22 pm
In Response To: Re: Material: BP screw in hatches sealing (Thomas Duncan)

When attaching hatch rings with mechanical fasteners (machine screws) or even just clamping, I'm very careful not to warp the ring - it needs to be absolutely flat, or you can have problems with the lid sealing. With screw-in or snap-in plates it's even more critical than with the 'rubber' lids. With a stiff deck, pulling the hatch down to a less-than-flat deck will cause lots of problems. I usually use a flat plywood disc on top of the hatch ring and put some weights on top of that, rather than using clamps or bolts to put pressure on the hatch ring.
With a flexy deck, I'd consider stiffening up the deck, or at least adding a glass or plywood 'ring' stiffener (two semi-circles to pass through the opening?) so that the deck was 'sandwiched' between the stiffener and the hatch ring....again being careful to keep things flat.

Messages In This Thread

Material: BP screw in hatches sealing
Thomas Duncan -- 2/8/2015, 11:26 am
Re: Material: BP screw in hatches sealing
JohnAbercrombie -- 2/8/2015, 12:10 pm
Re: Material: BP screw in hatches sealing
JohnAbercrombie -- 2/8/2015, 5:18 pm
Re: Material: BP screw in hatches sealing
Thomas Duncan -- 2/8/2015, 8:47 pm
Re: Material: BP screw in hatches sealing
Mike Bielski -- 2/8/2015, 10:18 pm
Re: Material: BP screw in hatches sealing
Brian Nystrom -- 2/9/2015, 8:40 am
Re: Material: BP screw in hatches sealing
daveg -- 2/9/2015, 11:42 pm
Re: Material: BP screw in hatches sealing
Bill Hamm -- 2/10/2015, 1:01 am
Re: Material: BP screw in hatches sealing
Brian Nystrom -- 2/10/2015, 7:28 am
Re: Material: BP screw in hatches sealing
Thomas Duncan -- 2/12/2015, 8:11 am
Re: Material: BP screw in hatches sealing
Jay Babina -- 2/9/2015, 8:55 am
Re: Material: BP screw in hatches sealing
Thomas Duncan -- 2/9/2015, 10:12 am
Re: Material: BP screw in hatches sealing
JohnAbercrombie -- 2/9/2015, 1:22 pm
Re: Material: BP screw in hatches sealing
Thomas Duncan -- 2/9/2015, 3:24 pm
Re: Material: BP screw in hatches sealing
JohnAbercrombie -- 2/9/2015, 5:59 pm
Re: Material: BP screw in hatches sealing
Thomas Duncan -- 2/9/2015, 6:30 pm
Re: Material: BP screw in hatches sealing
Thomas Duncan -- 2/9/2015, 7:58 pm
Like this stuff
Jay Babina -- 2/9/2015, 3:17 pm
Re: Like this stuff
Thomas Duncan -- 2/9/2015, 3:30 pm
Re: Like this stuff
Brian Nystrom -- 2/10/2015, 7:36 am
Re: Like this stuff
Jay Babina -- 2/10/2015, 3:01 pm
Re: Like this stuff
Mike Bielski -- 2/11/2015, 10:04 am