a little help, please?

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Forum topic by nailbanger2 posted 06-02-2011 01:34 AM 1530 views 0 times favorited 11 replies Add to Favorites Watch
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1041 posts in 4634 days

06-02-2011 01:34 AM

Topic tags/keywords: question mahogany

I’m about to start a coffered ceiling, 10 ft. elevation, that I am going to have to use veneer on. I told the client several times this should be 1/4 ply, but he doesn’t have enough ply to do the ceiling and wainscot. This is all mahogany that I’m talking about. What I’d like to know, being as the existing substrate is primed drywall, what kind of glue would everyone recommend? I know, I know, this is a bad idea, but it is going to happen, so I just want to minimize the bad spots.

My thinking at the present, is liquid nail, applied liberally to the back of the veneer, attached to the drywall with spring loaded poles with a caul rig attached. I’ll then use a dry paint roller (1/2” nap) to roll from the center out. Once it’s rolled out, I’ll attach the precut sides of the beam adjacent to that sqare of the ceiling.

Please help, there are a lot of firsts involved here for me. One other thing, I have a sample of the veneer, and I’ll test it tomorrow to see if liquid nail will bleed through the veneer. Thanks in advance.

-- Wish I were Norm's Nephew

11 replies so far

View Loren's profile


11549 posts in 5138 days

#1 posted 06-02-2011 02:24 AM

Don’t mess with it. You’ll get yourself in trouble and you’ll be
tired and angry and the client will likely be angry too.

Tell your client to buy more 1/4” ply and do it nice, flat
and clean. You can get veneer laid-up on 1/4” MDF, both
sides (necessary) and it’s real consistent and sanded dead

View nailbanger2's profile


1041 posts in 4634 days

#2 posted 06-02-2011 04:27 AM

Bentlyj, thanks for the link.

Loren, wish I could say no. Long story, but this owner will not be mad at me. Both of you have given me ideas, though, and my thanks to you.

-- Wish I were Norm's Nephew

View Moron's profile


5048 posts in 5384 days

#3 posted 06-02-2011 04:37 AM

I personally think this will bever work

-- "Good artists borrow, great artists steal”…..Picasso

View Jack_T's profile


623 posts in 4522 days

#4 posted 06-02-2011 05:03 AM

I agree with Bentlyj, Loren and Moron. Your plan will never work. Mount the veneer to a substrate like mdf.

Good luck.

-- Jack T, John 3:16 "For God so loved the world that he gave his only Son, so that everyone who believes in him might not perish but might have eternal life."

View nailbanger2's profile


1041 posts in 4634 days

#5 posted 06-02-2011 12:47 PM

Thanks, Moron and Jack T, for your responses. Just to be clear, it was never my plan, and because of your responses, the process will be changed. I keep seeing the opinion that it should be mounted to a substrate prior to installation on the ceiling. This makes sense, however, MDF is a little heavy and I am doing this by myself. What does everyone think of 1/4 ply, or dare I say it, Luaun? And if that’s the plan, what about contact cement?

-- Wish I were Norm's Nephew

View miles125's profile


2180 posts in 5496 days

#6 posted 06-02-2011 01:35 PM

Contact cement works ok for small veneering like edgebanding but not so much for big expanses. You really need a pva glue in a press type situation to do it right. Can you just buy the 1/4” mahog ply already laid up?

-- "The way to make a small fortune in woodworking- start with a large one"

View patron's profile


13722 posts in 4832 days

#7 posted 06-02-2011 01:48 PM

liquid nails
in my experience
is either way gooey
or hard as dried toothpaste
depending on shelf life
at the store
some thing smooth and washable
would be my choice

but veneer over sheetrock
a real mess as it is not consistent and smooth
more lumpy bumpy

even door skin over rock
then veneer
would be my choice
it would level out the highs and lows
and pva as noted
where you can adjust the pieces as you need
for good seams

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View nailbanger2's profile


1041 posts in 4634 days

#8 posted 06-02-2011 02:21 PM

miles, all the material was bought a long time ago.

David, thanks for your input. I had to google PVA to find out I already had some. Also, there will be no seams. The veneer will be under (or over, depending on how you look at it) the boards making up the fake beams in the coffer. If I use the Luaun, I can precut the skin around lights, a/c, dry fit to ceiling then take down to workstation and apply veneer. After drying, I can trim veneer with router, then re-install.

I agree with all of you, this would be so much easier with 1/4 mahogany ply. There is just nothing I can do about it. My choices in this matter are: do it with the veneer, or spend the next week looking for work that I haven’t been able to find in several weeks while the bills pile up.

-- Wish I were Norm's Nephew

View Sawkerf's profile


1730 posts in 4559 days

#9 posted 06-02-2011 03:30 PM

Before you make any “final” decisions, check the “flatness” of the ceiling drywall. Use a strong flashlight to “rake” the ceiling and don’t be surprised if it’s pretty wavey. It isn’t noticeable on a light color, flat, finish, but might stand out on anything darker.

-- Adversity doesn't build reveals it.

View nailbanger2's profile


1041 posts in 4634 days

#10 posted 06-02-2011 04:44 PM

Anji, very interesting, way to think out of the box. Any thoughts on Mastic, everyone?

Sawkerf, once again, it’s not my decision.

-- Wish I were Norm's Nephew

View nailbanger2's profile


1041 posts in 4634 days

#11 posted 06-02-2011 06:49 PM

Once again, everyone, thank you for all your advice. I sent a link of this thread to my client (and friend) and I don’t know if he checked it out or not, but he has decided to use 1/4 ply on the ceiling. Not that I was worried or anything (cough, cough)

-- Wish I were Norm's Nephew

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