Hi Iouri
No you can't glue. MDF or plywood to the bottom. Laminating a solid wood
panel to something like plywood or MDF would not allow your glued up panel
to move as it will want to do. Do anything to greatly reduce the cherry
panel's ability to move and it will eventually and probably quickly destroy
itself. That's why I said it the make up was an important factor. Solid wood
ALWAYS moves and if you don't take that into consideration in the design you
do so at your own peril.
A little redesign work is in order. On a similar project where I wanted a
thicker top I just made the substrate, in my case plywood, a hair or two
smaller then the top, put some double sided carpet tape in the middle of the
substrate and simply dropped the glued up panel on. It was, of course, edged
to hide the substrate. The top now had room to move and with the double
sided tape only in the middle the wood could move in and out uninhibited. a
stripe of glue along the middle of the substrate would work also. You can
also just make the top look thicker by just gluing a filler around the edges
and only gluing the filler blocks in the middle where it's on end grain.
That's two ways, I'm sure there will be more once people see what you have
in that cherry panel. As long as the solid wood panel can expand and
contract across the long grain you will be ok.
Plywood or MDF? It really doesn't matter. In a kitchen environment I would
probably go with plywood in the very unlikely chance the substrate got wet.
Besides the plywood is lighter and I hate horsing around MDF.
Splines are fine. However, just because a piece is 1 1/2" thick doesn't mean
you have to make the slot for spline in the middle of the 1 1/2 thickness.
You can make it completely in the 3.4" solid wood piece or entirely in the
MDF/ply if you want. I would suggest the solid wood part.
Hope it helps
--
Mike G.
Heirloom Woods
www.heirloom-woods.net
"Pefferie" wrote in message
...
Mike,
thank you very much for your reply!
By solid cherry panel I mean "glued up boards cherry panel".
I do not have a biscuit joiner, but I guess I could rent one at
HomeDepot...
although it seems simpler to just rout a groove in both the panel and the
border and glue a spline around the perimiter and in the miter.
Something I am worried about is that if I rout a groove at the mid-depth
of
the board, it would be half in the wood, half in MDF. It that a problem?
BTW, should I use MDF or plywood?
Thanks,
iouri
"Mike G" wrote in message
...
First important question to be answered is, what do you mean by solid
cherry
panel? Cherry plywood panel or glued up boards cherry panel? That is
going
to be a major factor in answering several of your questions.
For the best appearance the ends of the border should be mitered. I'd
probably use FF biscuits but you have to have a biscuits jointer that is
adjustable to the irregular angles. Splines would work well as will
dowels
if you can drill the holes at the proper angle. A lot depends on what
tools
you have to work with and how good you are with them.
Generally you'd want to be easing edges and such after the piece is all
glued up and the glue has cured.
.
--
Mike G.
Heirloom Woods
www.heirloom-woods.net
"Pefferie" wrote in message
om...
Hi,
I want to make a countertop for a kitchen island that would create a
separation between the kitchen and the living room. In a building
materials salvage store, I bought:
A solid cherry panel (3/4" thick)
Mahogany boards (1.5" thick)
My plan is to glue another panel to the underside of the cherry one to
make it thicker and make a ~ 1.5" mahogany border around the
perimiter.
The project is complicated by the fact that the island is an irregular
hexagone.
As I have very little experience with woodworking, I would appreciate
any constructive advice, especially:
1. What should I glue to the board's underside - MDF or plywood? What
gue should I use?
2. How do I attach the border - just glue, glue + tongue-and-groove,
biscuits?
How do I join the ends of the border segments - miter or rabbet
with dowels, or? If the segments are just glued together, is there a
risk that they could separate due to the board's shrinkage and
swelling (even if it is glued to MDF)? What kind of glue?
3. Routing the outer edge of the border - should I glue the border and
then rout it, or rout the segments before gluing on a router table?
Thanks,
iouri