"Patrick" wrote in message ...
I want to put together a stitch and glue boat. But cant afford to get all
the marine ply at once.
If I start stitching the hull together, is it going to warp in the damp
British Autumn air, if I cant put the bulkheads in and glue it for a few
months.
I,ll be building it in an open barn.
Any ideas Patrick.

Technically, you should not have problems if it is properly
ventilated... and it used to be that way with the Joubert plywood I
used to get. Unfortunately, there is a lot of difference even in
BS1088 from manufacturer to manufacturer. The best stuff I used to get
was made in France, and the local buyers won't buy it anymore. Now we
have this stuff from Morocco and it checks, seems more brittle, and
has lousy color too. Anyway, to your question... You could tack some
temporary battens into the parts to hold the shape, especially on the
edges, or just not cut till you have all the wood if it is a smaller
project. Either way, you will be better to give it light and
ventilation in the barn, just not direct rain.
Scotty

Your quite right of course I should just leave all the ply in a big pile
until I have enough for the hull at least. But everyone keeps asking me if I
have started my boat yet so I felt as though I should at least get a couple
of bits of wood together!
But its a good idea to maybe put a few battens or spreaders in to keep it
honest.
Patrick

----------
In article ,
(Backyard Renegade) wrote:


"Patrick" wrote in message
...
I want to put together a stitch and glue boat. But cant afford to get all
the marine ply at once.
If I start stitching the hull together, is it going to warp in the damp
British Autumn air, if I cant put the bulkheads in and glue it for a few
months.
I,ll be building it in an open barn.
Any ideas Patrick.

Technically, you should not have problems if it is properly
ventilated... and it used to be that way with the Joubert plywood I
used to get. Unfortunately, there is a lot of difference even in
BS1088 from manufacturer to manufacturer. The best stuff I used to get
was made in France, and the local buyers won't buy it anymore. Now we
have this stuff from Morocco and it checks, seems more brittle, and
has lousy color too. Anyway, to your question... You could tack some
temporary battens into the parts to hold the shape, especially on the
edges, or just not cut till you have all the wood if it is a smaller
project. Either way, you will be better to give it light and
ventilation in the barn, just not direct rain.
Scotty

I can't see it as being a problem. Even the local building code only
specifies a 1/8 inch expansion gap between sheets of exterior grade plywood
on a roof. Would 1/8 inch in 4 ft be too much?

There are a lots of plywood boats which took longer than a year to build.
As one young woman of my aquaintence said about childbirth, "a lot of
other people have done is successfully".


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Thanks William, It was the possibility of the sheets twisting which I was
more worried about.
Patrick

----------
In article ,
(William R. Watt) wrote:


I can't see it as being a problem. Even the local building code only
specifies a 1/8 inch expansion gap between sheets of exterior grade plywood
on a roof. Would 1/8 inch in 4 ft be too much?

There are a lots of plywood boats which took longer than a year to build.
As one young woman of my aquaintence said about childbirth, "a lot of
other people have done is successfully".


--
------------------------------------------------------------------------------
William R Watt National Capital FreeNet Ottawa's free community network
homepage: www.ncf.ca/~ag384/top.htm
warning: non-freenet email must have "notspam" in subject or it's returned

Patrick wrote:

Your quite right of course I should just leave all the ply in a big pile
until I have enough for the hull at least. But everyone keeps asking me if I
have started my boat yet so I felt as though I should at least get a couple
of bits of wood together!

It seems to me that external pressure is the wrong reason to start building.
Build when it suits YOU, not anyone else. It's your money and labor at stake,
not theirs.

--
Regards

Brian