PLANK GAPS in 1953 FEADSHIP MAHOGONY

by Stuart

I have hired a crew and completed half of the above the waterline work.

Best Stuart

Comments for PLANK GAPS in 1953 FEADSHIP MAHOGONY

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Dec 22, 2012
 looking for the cause
by: Trewil Norge

Seams (sorry) that the recommendations here are just trying to treat the symptoms and ignoring the cause.

Why are there gaps of this size on your deck?

I suggest you check your structural integrity athwart-ships, deck beams, shelf, fastenings, etc.

When you are satisfied that all is ship shape, then you can think about caulking.

Oakum is usually tared and not very many synthetics will attach to it.

Get a hold of a pro with years of experience in old boats and listen to his advise, or, better yet, hire him to do the job.




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Dec 21, 2012
 caulking fecship
by: Peter

Use cotton

Peter
Dec 20, 2012
 Double Planked Classic Feadship
by: Mike

Ah yes, double planked, sorry I think I was half asleep when I first commented.

I was thinking of small trailerable boats.

I mentioned “Slick Seam” as more of a temporary seam stopper that could be quickly applied to keep the rain out but would need to be replaced eventually.

Yes, Interlux White 31 seam filler would be perfect or Pettit 7110 White seam compound, both have good reputations.

Oakum would fill that gap better than cotton, though cotton is rather more forgiving than oakum.

However, there shouldn’t be much movement in the topside planks so use oakum for the wider parts of the seams and cotton for tighter places.

But don’t forget to check the plank to frame fastenings first, if there should be any problems with them caulking could make things worse if the planks were to swell.



Dec 20, 2012
 ABOVE THE WATERLINE
by: Anonymous

THANK YOU FOR YOUR INPUT CHARLES
#1
its above the waterline work not the hull
#2
I do not have one year to wait for this to dry.
#3
I have been cautioned dozens of times NOT TO FIBERGLASS OVER WOOD
that will not happen under any circumstance

thanks for that but it does not apply.
Dec 20, 2012
 double planked
by: Stuart

Mike the entire vessel is double planked
there is 1/2 inch mahogany at a horizontal angled pattern as the base layer. There is 5/8 mahogany over that.ALL OVER.

What about cotton versus oakum...I see a 25 foot area
where there is 3/8 inch gap between the planks next below the rub rail mahogony first board.

Do you recommend the interlux white seam filler
have seen good things about that?

thanks a bunch
Dec 20, 2012
 Feadship Seams
by: Mike

Hi Stuart,

First thing make sure that the fasteners are OK, that there are no gaps between the inside of the planks and the frames.

I'm not familiar with the construction of your Feadship but usually the double planking is only on the underwater parts, the topsides being single planked.

If that is the case you could caulk with cotton etc in the usual way.

Otherwise just go along the seams with something such as “Slick Seam” which will allow those planks to swell and can be applied to wet or even oily seams.

Main thing is to stop any leaks from the outside of the hull not the inside, especially if the topsides are double planked.
Dec 19, 2012
 THIS WORKS
by: charles gatchell

BUT IT'S NOT CHEAP. REMOVE ALL THRU-HULLS,,,SANDBLAST THE BOTTOM, LET DRY FOR 1 YEAR.
FILL ALL THE DRIED OUT BOTTOM ,,ALL OF IT,, I SAID,,
WITH WEST SYSTEMS EPOXY MIXED WITH 401 ADHESIVE FILLER.
SAND FILLER THEN COVER THE BOTTOM WITH 3 LAYERS OF 18 OZ WOVEN ROVING-MAT COMBINED , APPLIED WITH WEST SYSTEMS EPOXY. LIGHT SAND TO FAIR THEN APPLY WEST SYSTEMS BARRIER COAT. REINSTALL THRU-HULLS,,
LIGHT SAND,,,BOTTOM PAINT!!!!!
FORGET ABOUT IT.
MIGHT BE A GOOD IDEA TO CORASEAL AND PAINT THE STEEL FRAMES TOO !!!!
TAKE A LOOK: http://www.keysyachts.com/page10a.html

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