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I have to make a 4x12 painted wood sign to go against a wall. I'm going to use 3/4 MDO and planned on joining a 4x8 with a 4x4. I was going to join the two pieces by screwing/gluing 2x6x8 wood planks on the back of the sign, across the seams. Is this a good way to do it?
The outside edge of the MDO will be covered with plastic edge capping. What should I do about the seam between the 4x8 and 4x4 - wood putty the edges? Put Gorilla glue in there? Put wood putty in there and sand it down to try and hide the seam? ( I told the customer a seam might show and she has no problem with that)
They make an "H" molding for this purpose. It is like a double sided channel molding which will accept both pieces of MDO. I have used it in the past and it works great. It is a tight fit and can be tricky to get on.
-------------------- Rob Larkham Sign Techniques Inc. Chicopee, Ma Posts: 607 | From: Chester, Ma. | Registered: Apr 2002
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Peter, We usually make a "sandwich" consisting of a back panel bonded to a face panel with offset seams. Screw and glue the backer from behind. In this case I would use two layers of 11mm MDO. We have also used biscuits and outdoor glue Cheers.
FWIW, I wouldn't put the seam off-center-- it is sort of a visual clinker. Even though you would have to cut two full panels, I would use 1/2 inch good both sides MDO, and cut them to four foot by six foot. Wood putty and acrylic latex all the edges, prime and paint the panels before assembling to pressure treated 2x4s on the back.
On a fire house sign a few years ago, I fastened the panels to the back frame with round head brass screws evenly spaced, put a piece of 2x4 behind the center seam, brass screwed both panels, and just let the screws be part of the design. Sure, they tarnish, but they don't rust and streak.
Most thing about the 3/4 MDO is, I think you will wind up with a sign that is a lot heavier than it needs to be.
On the pressure treated back frame just paint the same color as the face, but without priming. Thin the paint some and let it act more like a stain.
Hope this is of some help.
-------------------- Bill Preston Fly Creek, N.Y. USA Posts: 943 | From: Fly Creek, N.Y. USA | Registered: Jan 2000
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![[Eek!]](eek.gif)
oops, I meant splice. ![[Razz]](tongue.gif)
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