[Public-List] Portlights

[Bill Wallace via Public-List]

I just finished rebedding mine this last winter with butyl.  Still needs to have a bit more cleanup of the butyl.

I went to home depot, bought a 1/2 sheet (4x4') of 0.2" clear acrylic.
Removed the old portlights, brought them home to use as a pattern (draw on the plastic film), and using a plastic scroll saw bit (the bit is metal, but intended for plastics :-) in a BATTERY powered drill, I cut the acrylic with water running over it - do NOT do this with a plug in scroll saw.  Cut right on the outline so it gets cut away to make the new window the same size/shape.  The water keeps the plastic from re-melting and allows a nice clean cut.  I would suggest you go to a plastic place and buy a 1/4" sheet instead (0.25") as the 1/5" (0.2) is just a bit thin for the openings - the thinner bit works sort of ok, but I ended up needing to shim the inside in a couple of spots to drive the plastic against the frame a bit harder.

Buy good quality butyl - I had one window that I did with a very hard butyl tape that was quite hard to get to seal.  The other 3, with a much softer butyl were far easier to get to seal.  Apply the butyl to the outer frame - alternatively, place the newly cut window in place and apply the butyl to the join of the window to the dog house.  Apply a small wrap of butyl to each bolt as you re-install it, and tighten the nut from the inside while someone holds the outside stationary so only the nut moves.  This was the only part I needed a second person for.

Do not expect to get it fully tightened the first try - get it ok, then wait for a nice hot day and finish it when hot.  


Use a plastic putty knife with water for cleanup for the bits that ooze out after the final tightening.

Mine survived several days of very heavy rains in the 1000 Islands this summer with no leaks.  Very nice to not get dripped on any longer and to be able to see out the windows again.  One 1/2 sheet was enough for all the fixed portlights, both big/small, but not for the two opening portlights (which I haven't touched yet).

Bill




On Friday, October 3, 2014 3:18 PM, Jeffrey via Public-List <public-list at lists.alberg30.org> wrote:
 


Bob, are you talking about the Bed-It stuff that Mainsail sells?

I've used it for portlights and it worked great. Better on a warm day.

http://www.pbase.com/mainecruising/rebedding_hardware&page=3

-Jeff


Seagrass. #116
Boothbay Harbor, Maine
http://sailboatseagrass.com/

<http://instagram.com/jfongemie>

On Fri, Oct 3, 2014 at 12:29 PM, Bob Norway via Public-List <
public-list at lists.alberg30.org> wrote:

> Has anybody tried rebedding portlights using butyl tape? I've used it for
> rebedding my stanchions and chainplates and it seems to be working well, so
> far.
> Thanks for any input.
>
> Bongo Bob
> S/V Beowulf #488
>
>
>
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-- 
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Jeffrey Fongemie

<http://instagram.com/jfongemie>

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