Hello,

I am going to install ceiling panels in two rooms and have bought economy grade which does not have end tongue. They should be glued and joined over the battens.

Now I'm wondering if there's any advantage to also mitre them into each other? That is, cut them at a 45-degree angle with the blade and thus get a "more stable" joint, like a poor man's end tongue. Or is it just unnecessary work?

What do the carpentry pros say?
 
The inner panel presumably only has a "decorative" function, i.e. no supporting purpose.

So it's probably a matter of appearance if/how you splice or not.
But glue? Aren't you thinking about boat building now?

//KoW
 
I'm not a professional carpenter, but every panel ceiling I've seen put up has lacked end grooves, just cut with a fine-toothed miter saw.
 
End joint is meant for joining between studs, e.g., tongue and groove boards on an underroof. Interior paneling is joined on studs/batten, without glue.

And if you join on a stud/batten, you hardly need a "stronger" joint. If you have bought paneling that has been outside, let it sit inside for a while before you put it up, so it doesn't shrink as much.
 
I have tried a few times when it hasn't been suitable to extend on a rule, mostly due to material shortage, to biscuit the joint and let it end up where it ends up.
 
Gilbert said:
I've tried a few times when it wasn't suitable to splice on a rule, mostly due to lack of material, to biscuit joint the splice and let it end up where it ends up.
Yep, I've done that too and it works reall.... well but it might be a bit tedious and requires a machine for it. But in terms of time, it's negligible as it takes a maximum of 1 minute/joint to make two grooves and a little glue if you want to fancy it up.
 
Ceiling panels, I have never seen with end tongue and groove. I don't even think it exists. You just make a butt joint on a beam/rafter. You also don't need to glue the end grain.
 
andersmc said:
I've never seen ceiling panels with end tongue-and-groove. I don't even think it exists. You just make a butt joint on a joist/rafter. You also don't need to glue the end grain.
There certainly are end tongue-and-groove ceiling panels. About 50 sqm just in my house...
 
But when you have tongue and groove on each long side of the board, you don't have to worry about it at all. It would take a lot for something to go wrong with it.
 
Yes, for example, Siljan's ceiling panels are tongue and grooved. However, not their economy sorting (but I got tongue and grooved B-sorting for one of the rooms, which is currently being installed with varying lengths). And in Siljan's description, it says that the joints should be glued, but perhaps that only applies to tongue and grooved joints between studs/spars?
 
Probably it only applies at the joint between regel/gles yes.
 
Or, it might always apply, but normally you don't glue at the joint on a stud.
 
Well, it doesn't seem like it hurts to glue, so I'll keep doing it. It's not like huge amounts are used ;)
 
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