Max humidity of wood before it can be varnished?

by John
(The Netherlands)

Does anyone have information about max allowable humidity percentage of the wood (wooden rowing boat) before it can get varnished?

Our club: https://www.rv-iris.nl/

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Varnish
by: Anonymous

The adhesion of the Varnish will be better if the surface is nice and dry.

If you are working outdoors and unsure if the day is warm/dry enough, splash a little water on the old varnish, leave it for 10 mins, if the surface has dried then it is OK to varnish.

If you are planning to use a traditional, oil based varnish you could use oil, Tung or pine oil to cover any bare patches of wood until conditions improve.

As traditional varnish oil based it should stick to it just fine.

Varnish
by: Bill

Are you varnishing over existing varnish or onto bare wood?

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Dinghy design

by Bob Gould
(Milton Keynes UK)

Anyone know where is the best place to get a Dinghy design for an 8 to 10 foot clinker dinghy.

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Which way grain in oak rib

by John
(Portland, Ore)

Should white oak ribs for a small boat show the grain vertically or horizontally at the end of the rib?

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rib direction
by: Anonymous

horizontal !!!!

Ribs
by: Bill

Best if the grain is parallel to the side of the boat, to reduce the danger of fasteners splitting the rib.

Ribs
by: Bill

Not quite sure what you mean, the grain should, ideally, run along the length of the rib.

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Ring Cleats

by LJ
(Vancouver, B.C.)

What is the best knot and way to moor with only ring cleats available?

Thank you.

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Mooring Rings
by: Mike

Were possible I prefer to ‘cleat off’ my mooring lines, it makes it easier to undo them should the lines come under tension.

So, with a mooring ring I would be inclined to pass the lines through the rings and cleat off on board.

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mahogany transom checking

by bob
(middletown nj)

Hello.how can I stop my transom from checking.

I need to strip it but I do not want to revarnish.

Thanks for any help

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Checking
by: Mike

Hi Bob,

Just a few questions.

What material is the transom, is it Ply or solid planked wood?

Are you planning to finish it with paint?

Is this just surface checking or deeper cracks?

Surface checking along the rays of the wood can be caused by too quick drying of the surface, best prevention is to keep it well sealed with paint or varnish.

Plywood with a softwood veneer can suffer from it too.

One old repair method is to fill small cracks with a paste made up using sawdust and cascamite wood glue, best not to use silicone based caulking.

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