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Subject: Re: adhering veneer to timber flex

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Message Thread:

adhering veneer to timber flex

7/18/19       
Brian w Robertson Member

Hi all,

I'm making a curved bar front and trying to figure out the best way to do it. I was going to build a framed plywood curved wall with a radius of around 71 3/4". the wall will be 40.5" tall and a length of 86". After I have the skeleton of the wall I'm going to wrap it in 3/4 timberflex. Then I was going to use either a spray or roll on contact adhesive and apply the veneer and trim later. Is there any glue that is forgiving? Do I have the right idea of what i'm doing? does it matter if I use fleece or paper backed veneer? where is a good place to buy 8x4 (grain running the 4' direction) walnut veneer. Thanks for the help


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7/19/19       #2: adhering veneer to timber flex ...
David R Sochar Member

Veneer is not wallpaper. Despite the DIY guys that will gladly tell you contact cement, spray adhesive and similar will work for bonding their veneer. Those are all considered temporary, inadequate glues for only the quickest and dirtiest things.

Vacuum bagging is an accepted way to clamp the veneer to the wall, using a plastic resin glue, or dedicated veneer glue for adhesives.

Forgiveness comes in the production design. Your experience (flat veneers?) will tell you a lot about what you are about to do. A vacuum bag has the ability to clamp as a dry run, no glue, to see how it will all go together and anticipate the tight spots.

7/19/19       #3: adhering veneer to timber flex ...
Tom Gardiner

I recommend applying a crossband veneer to the face before vacuum bagging the curve. It keeps the veneer flat - less prone to wrinkles and resists telegraphing imperfections in your substrate. Even staple depressions will be visible through a single layer of veneer.

7/19/19       #5: adhering veneer to timber flex ...
Brian w Robertson Member

David,

where do you suggest I buy a vacuum bag and how much do you think I'll be spending? And do you know of a place to buy the glues you're suggesting? I found a craft paper backed 20 mil veneer in walnut. it seems like if it is a 8 x 4 veneer you can't get 10 mil

7/19/19       #6: adhering veneer to timber flex ...
Brian w Robertson Member

Tom,
when you say "cross band veneer" do you just mean a "sub" veneer with the grain running the 8' direction?

7/19/19       #7: adhering veneer to timber flex ...
Tom Gardiner

Yes, my terminology might be wrong. You are using a backed veneer so you will already be benefiting from the dimensional stability however the crossbanded veneer will stiffen the face and reduce the chance of buckling and telegraphing of imperfections in the substrate.
As to what to buy in a vacuum bag, I have a 20 urethane bag that has lasted over ten years and many pressings. I got mine from Vacuum Pressing Systems. My pump i picked up used on kijiji. It is intended for AC servicing.
You will have to decide if this is something you want to do occasionally or more regularly. If it is a one off you can make a bag from polyethylene fil and red tape.

7/20/19       #8: adhering veneer to timber flex ...
David R Sochar Member

Daryll Keli at Vacuum Pressing is where I get most veneer supplies. He also offers two instructional videos that are very helpful in getting off to a good start.

I got my two videos so long ago they are VHS tapes!

 

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