LumberJocks

PSA veneer buckling problem -- need advice

  • Advertise with us

« back to Coffee Lounge forum

Forum topic by Wade Campbell posted 10-13-2018 11:03 PM 576 views 0 times favorited 6 replies Add to Favorites Watch
View Wade Campbell's profile

Wade Campbell

9 posts in 1811 days


10-13-2018 11:03 PM

Topic tags/keywords: veneer buckling shellac question veneering

I am making a desk, and used a hollow core door for the top. I applied a PSA veneer to the top, shellaced it, and (once dry) stored it in an interior space until I got the rest of the desk done. I got side-tracked and came back a month later and the veneer had buckled severely along the lines where the strip panels of wood making up the veneer (i.e., not joints I made in the veneer).

I’m getting ready to remedy the issue and need advice since I don’t know what caused the buckling.
The desk top was stored inside my house, which does undergo some RH variations. (I’m in MN where winters are cold and dry, and summers are somewhat humid). I am also suspicious that the brushed on shellac somehow penetrated the veneer and compromised the glue—if this is likely, then I would not use an alcohol-based finish this time around.

I have the following questions re: what I should do after removing sheet of veneer that had some buckling:

1. Should I use PSA venner or not? If I use non-PSA veneer, is contact cement my best glue option? (I don’t have a vacuum press.)

2. Should I use a non-alcohol sealer on the veneer, or is shellac ok (i.e., not the cause of the buckling)?

I only want to do this one more time, so others’ experience would be much appreciated.

-- Wade V Campbell


6 replies so far

View AlaskaGuy's profile

AlaskaGuy

5351 posts in 2820 days


#1 posted 10-13-2018 11:40 PM

Don’t know what to tell you.
I have use a fair amount of PSA veneer. I use it for the exposed end panel in kitchen cabinets matching the wood of the face frames. Never had a problem with it. Did you follow the instructions for applying the veneer? Was the surface of the door sealed? PSA is not supposed to go over raw wood.

How did you apply pressure to the veneer? Hopefully not with a roller like you would do with HLP (Formica)

-- Alaskan's for Global warming!

View Lazyman's profile

Lazyman

3977 posts in 1898 days


#2 posted 10-14-2018 05:12 AM

Chances are that you didn’t apply enough pressure when you applied it. it’s called pressure sensitive adhesive for a reason. You should use a veneer hammer or veneer scraper to apply the pressure and make at least 2 passes over the entire surface. Failing to seal the substrate or moisture can also cause problems.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View AlaskaGuy's profile

AlaskaGuy

5351 posts in 2820 days


#3 posted 10-14-2018 05:44 AM

Toward the bottom of the page shows a veneer scraper and a pattern of applying pressure.

https://www.veneersupplies.com/products/Veneer-Scraper-for-Backed-Veneers.html

-- Alaskan's for Global warming!

View Wade Campbell's profile

Wade Campbell

9 posts in 1811 days


#4 posted 10-14-2018 03:24 PM

Yes, I sealed the door prior to applying the PSA veneer, and I used a veneer scraper to apply pressure. It all looked great for a week or two..

-- Wade V Campbell

View AlaskaGuy's profile

AlaskaGuy

5351 posts in 2820 days


#5 posted 10-14-2018 05:09 PM

Back to square one, don’t know what to tell you. They claim you can use any finish on it.

-- Alaskan's for Global warming!

View Lazyman's profile

Lazyman

3977 posts in 1898 days


#6 posted 10-16-2018 03:07 PM

Any idea how old the veneer was? Just wondering if the adhesive went bad or perhaps was exposed to extreme heat somewhere along the way. I did a quick search and found one reference to a 2-year shelf life which doesn’t seem very long to me. Temperature and humidity can also play a role, especially at the time of application.

Just thinking out loud.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com