[Public-List] What glue and tar do we need???

[dan walker]

SOMEWHERE in the past i remember g dinwiddie referring to u as the lumberman ala monty python. it is true!! i still watch that thing and chuckle. the things you learn from this list are wonderful.  

--- On Fri, 4/2/10, Mike Lehman <sail_505 at hotmail.com> wrote:

> From: Mike Lehman <sail_505 at hotmail.com>
> Subject: Re: [Public-List] What glue and tar do we need???
> To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org>
> Date: Friday, April 2, 2010, 2:06 PM
> 
> I do not know if I can help with your questions , but I may
> be able to help explain what is going on with the wood. Any
> piece on lumber has 3 planes (longitudinal plane; radial
> plane; tangential plane). Each plane has a different
> coefficient of expansion. The longitudinal plane is .05%,
> the radial plane is 10% and the tangential plane is
> 5%.  If the wood is not air dried properly (3 years per
> 1 inch) then the expansion is greatest. After 3 years of
> air-drying the cells in the wood lose their elasticity, very
> similar to a rubber band that has been worked back and forth
> a number of times and it becomes much more stable. This is
> very important when making furniture (or seat hatches). The
> layout and construction becomes very important too to
> minimize the changes in dimensions of the wood after the
> piece is built. Wood ALWAYS moves, glueing (something we
> must do on boat parts) restricts that movement and cause the
> wood to crack.
> 
>  
> 
> There is your wood lesson for the day...have a Happy
> Easter
> 
>  
> Mike Lehman 
> 
>  
> ><((((º>`·.¸¸.·´¯`·.¸><((((º>`·.¸¸.·´¯`·.¸><((((º>
>  
>  
> 
> 
> 
> 
> 
> 
>  
> > From: elyse.pastor at sympatico.ca
> > To: public-list at lists.alberg30.org
> > Date: Fri, 2 Apr 2010 17:50:15 +0000
> > Subject: [Public-List] What glue and tar do we
> need???
> > 
> > 
> > Dear friends,
> > It has been a while since I wrote on the list but
> spring is here and we want to start the work that is needed
> on our A30. We had a great 2009 with a 1900 miles trip
> through the Great Lakes - something we really enjoyed.
> > Our issue is - we have to re-do the two hatches that
> have been leaking. The way they were made (about 3 years ago
> by the previous owner) - the woods of 3 - 4" x 18" have been
> glued onto the base with no distance between them. The
> hatches were then laquered several times and did really look
> good in the first season. Unfortunately the wood seemed to
> dry-out a bit more (I guess from 12 to 8% as required) and
> the woods stated to create spaces between themselves. This
> created the leaks and now our work. Also, the laquer fell
> off already after the first season.
> > What we want to do is the following:
> > 1.) Remove all the woods from the base (some have
> already fallen off - I do not know what glue has been used
> but it seems a rigid one that cracks if the wood moves).
> > 2.) Remove all the laquer/paint on all the wood.
> > 3.) Cut down the woods by about 1/8".
> > 4.) Re-glue them (with the space between the woods)
> onto the base, which is also out of wood.
> > 5.) Use a tar (like on real yachts that have wooden
> decks) to seal between the woods.
> > 6.) Use a natural oil once or twice a year to treat
> the wood (no laquer).
> > Now here are the questions:
> > 1.) What is the proper glue to glue the wood on the
> wooden base?
> > 2.) What is the proper tar to push between the woods
> for sealing?
> > 3.) Anybody knows a supplier in Montreal???
> > For your info - I visited the local large fine
> carpenter store and they were not able to supply me with
> anything I would require.
> > Thanks for the info.
> > Bruno & Elyse
> > Lady Heron, #297
> > 
> > 
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