I am going to install beadboard in a bedroom where there is currently stretched paper with wood paneling underneath. The room is 3.7m wide, and I planned to buy the beadboard in that length to avoid joints. But at the lumberyard, the closest length was 4m, and since the panel had end tongue, I decided to buy shorter lengths, thinking the end tongue would make a nice joint anyway and there would be less waste.

But in hindsight, I'm starting to wonder if I made a mistake because the end tongue might not make the joints much nicer than boards without end tongue that are cut straight. When joining without tongue, I've learned to miter the ends at a 45-degree angle to prevent gaps in the joint as the wood dries. But as I said, with tongue, it should be the same as cutting a non-tongued board straight.

I hope you understand what I mean because it feels like I’ve confused things a bit now. But the main question is whether I should return the wood I bought and purchase the 4m lengths instead to get a ceiling without joints, or will there be a nice joint with beadboard with end tongue?
 
If it gets so close that it becomes just 0.3 m/panel, switch so you get a seamless and nice roof.
 
I would also switch. If you are going to have ceiling moldings, any potential end shrinkage on full lengths will be hidden under the moldings as well.
 
That's how it will be, I'll go and exchange tomorrow.

One more question.
How and where do you nail? Hidden or visible?
And is it nailing with a hammer that applies?
 
Nail hidden with brad, 45 degrees in just above the tongue... or well, below it when it's up on the ceiling.
Use a nail set for the last bit to avoid breaking the tongue or leaving marks on the edge.
 
I just installed some beadboard in the ceiling.. buy screw clips!!! much easier than standing with a hammer above your head and trying to make it look nice - avoiding hitting the tongue and groove and pulling the last piece with a drift pin, etc..

My dad and I installed 15sqm in about 1h (full lengths of 3.6m cut to 3.5m)
Screw clips are available at K-rauta!
 
I assume it's those http://www.gapro.se/uploads/files68.pdf, (you need to scroll down a bit on the page)? They really look convenient. I'll check if they are available to buy nearby because I have 12 miles to the nearest K-Rauta.
 
Can't find any clips nearby, so it will be nailing with dyckert.

Farzan said:
Nail hidden with dyckert, 45 degrees in just above the fjädern... or well, below it when it's up on the ceiling.
Use a nail driver for the last part to avoid breaking the fjädern or making marks on the edge.
Fjädern, is that the "flärpen" next to the actual bead?
When starting, do you place the first plank with the tongue against the wall and the fjädern outwards?
 
When you described the room as 3.7m wide, I interpreted it as you intending to install the beadboard horizontally? Isn't it customary to install it lengthwise considering the light inlet, etc.? Not an expert by any means, just a thought since I am in the process of a similar project myself :-).
 
tobbe72 said:
When you described the room as 3.7m wide, I interpreted it as you're going to install the beadboard horizontally? Isn't it customary to install it lengthwise considering the light entry, etc.? I'm not an expert in any way, just a thought as I'm currently working on a similar project :-).
Yes, from the door's point of view, the beadboard will be horizontal, but since the floorboards run in that direction, I felt I had no choice.
 
Tomas J said:
Can't find any clips nearby, so I'll have to use nails.

The "fjädern," is it the "flärpen" next to the actual bead?
When starting, do you place the first plank with the groove against the wall and the fjädern outwards?
Yes, the "flärpen" that fits into the groove called not.
The answer to the second question is yes. You attach the first plank on the groove side too. Nail visibly far enough out towards the edge so that the ceiling list will cover it.
 
Farzan said:
Yes, the "flärpen" that fits into the groove called the notch. The answer to the second question is yes. You also attach the first plank on the notch side. Nail visibly far enough towards the edge so that the ceiling trim will cover it.
Ok, then I understand. Regarding nailing, do you place the nail where the "pärlan" ends and transitions into the notch?
 
John J said:
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Perfect, easier to see in a picture how it should be, and that was how I understood it all but I mixed up the terms a bit in my post. I wrote that the nail should go between the pearl and the groove but I meant the TONGUE! Ok, but then it's just a matter of starting to nail, but I came up with another question. How close should you nail?
 
J
Tomas J said:
Perfect, easier to see in a picture how it should be and that's how I had understood it all but I mixed up the terms a bit in my post. I wrote that the nail should go between the bead and the note but I meant the FJÄDER! Ok, but then it's just a matter of starting to nail but I came up with another question. How close should one nail?
On each joist or approximately 500 - 600 mm between
 
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