Marine Ply v exterior ply?
Diddly Whoot
I am getting ready to start construction on a barge type houseboat for use
on the west coast of Florida Inland waterways.
I have been advised that using exterior ply is just as good as using Marine
ply and a lot cheaper.
Any advise on this on this matter?
Any advise on the type of coating to use to protect the inside of the hull??
Anyone tell me a good source of ply by the Pallet??
thks
bg
Jacques Mertens
http://www.bateau.com/tutorials/tutorials_index.htm
in particular:
http://www.bateau.com/tutorials/marineply.htm
and the APA opinion at:
http://www.bateau.com/tutorials/APAply.htm
--
Jacques Mertens
Boat Plans OnLine
http://www.bateau.com
Diddly Whoot wrote in message <9zGc4.4401$Sh2....@news1.atl>...
John Abercrombie
>Hi,
>
>I am getting ready to start construction on a barge type houseboat for use
>on the west coast of Florida Inland waterways.
>
>I have been advised that using exterior ply is just as good as using Marine
>ply and a lot cheaper.
>
Well, you will probably save about 1% on the total project cost by
doing so. Balance that against the effect on resale value, longevity,
and peace of mind.
Doesn't make sense to me.
KF4call
>ply and a lot cheaper.
>
This question is kicked around often, probably at least once a month. Try Deja
news.
A few things I have learned
1)...completeness of coverage of the inside plies is a most important
characteristic of wood for boatbuilding and the major factor that
differentiates the two woods. 2) As someone else has stated, expressed as a
percentage of finished cost of the boat the difference is probably not "a lot
cheaper" as your advisor states. 3) Some will advocate "fixing" the experior
ply with epoxy, but this probably only succeeds in equalising the cost, not the
quality. 4) some builders seem to get much joy from their boats built of
exterior, and some seem to regret the choice, indicating that there are some
"individual differences" in action to consider as well.
I have chosen a middle of the road marine ply.
Regards, Warren
Ethan Romans
Ply. It has to do with number of plys, density, amount of voids and other
factors. I suggest you check it out on the net. There are several good sites:
http://www.mcvicker.com/twd/gwdi97/dti.htm#L
http://www.woodworking.com/cl01.html
http://www.onceatree.com/msgboard/message.htm
There should be some plywood manufacturers out there too. As an aside, I made
the decision to use marine ply after reviewing all the information.
Ethan
Diddly Whoot wrote:
> Hi,
>
> I am getting ready to start construction on a barge type houseboat for use
> on the west coast of Florida Inland waterways.
>
> I have been advised that using exterior ply is just as good as using Marine
> ply and a lot cheaper.
>
> Any advise on this on this matter?
>
John McCoy
>>I have been advised that using exterior ply is just as good as using Marine
>>ply and a lot cheaper.
>>
>>Any advise on this on this matter?
>A few things I have learned
>1)...completeness of coverage of the inside plies is a most important
>characteristic of wood for boatbuilding and the major factor that
>differentiates the two woods. 2) As someone else has stated, expressed as a
>percentage of finished cost of the boat the difference is probably not "a lot
>cheaper" as your advisor states. 3) Some will advocate "fixing" the experior
>ply with epoxy, but this probably only succeeds in equalising the cost, not the
>quality. 4) some builders seem to get much joy from their boats built of
>exterior, and some seem to regret the choice, indicating that there are some
>"individual differences" in action to consider as well.
This may be one case where exterior ply isn't a particularly bad idea.
A "barge type houseboat" is likely to be a pretty square box, thus one
of the major deficiencies of exterior ply, that the interior imperfections
can cause problems when bending, probably won't apply (I expect
most of the sheets will just go on flat). There also won't be anything
close to the stress a sailboat on a good wind, or a small motor, can
put on a hull, so strength won't be an objection. And, for a "barge
type houseboat" the esthetic qualities of the wood aren't likely to
be a big issue.
John
(p.s. Causeway lumber, if there's one on your side of the peninsula,
is probably a good bet for plywood "by the pallet". McMillan Blodel
will be cheaper, but I don't think they sell in less than a semi load.
Incidently, plywood isn't sold by the pallet, it's sold by the "unit")
Bob Walters
> I have been advised that using exterior ply is just as good as using
Marine
> ply and a lot cheaper.
>
> Any advise on this on this matter?
>
Yes..............you have been half mis-informed. Exterior ply is cheaper.
--
Bob Walters
PERDIDO DESIGN
Check out the web page at:
http://bobandching.home.att.net
Robert Lundy
building it here too?
Fiberglass Coatings Inc. (www.fgci.com) in St. Petersburg is now seeling
Marine Tech fir marine ply. The 1/4" stuff was listed at $25.xx per sheet
which is excellent since the cheapest I've been able to find A/C fir ply for
was $19.00 sheet in 1/4" (this was at Cox Lumber, a Pinellas county lumber
chain).
For good long pieces of fir, try Cox Lumber in this area. I was able to buy
out of stock (no special order) 18' and 20' #1 clear fir. The girl at the
office indicated they could get lengths up to (I think) 30' with 1-2 day
turnaround. Excellent service when you remember most Fla houses are built
of concrete block.
--
Robert Lundy
St. Petersburg, Fla.
see progress at http://www.seawyse.com/flboatyard
--
Robert Lundy
St. Petersburg, Fla.
see progress at http://www.seawyse.com/flboatyard
"Ethan Romans" <roma...@scci.net> wrote in message
news:3873FF98...@scci.net...
> There is a completely different set of specifications for Marine Ply vs
Exterior
> Ply. It has to do with number of plys, density, amount of voids and other
> factors. I suggest you check it out on the net. There are several good
sites:
> http://www.mcvicker.com/twd/gwdi97/dti.htm#L
> http://www.woodworking.com/cl01.html
> http://www.onceatree.com/msgboard/message.htm
>
> There should be some plywood manufacturers out there too. As an aside, I
made
> the decision to use marine ply after reviewing all the information.
>
> Ethan
>
>
>
>
>
> Diddly Whoot wrote:
>
> > Hi,
> >
> > I am getting ready to start construction on a barge type houseboat for
use
> > on the west coast of Florida Inland waterways.
> >
> > I have been advised that using exterior ply is just as good as using
Marine
> > ply and a lot cheaper.
> >
> > Any advise on this on this matter?
> >