9.5mm or 12.5mm Plasterboad for Dot & Dab?

Argyll · Post by **Argyll** » Wed Jun 01, 2022 12:17 pm

I'm about to dot and dab a wall. I'm curious what professionals use in terms of thickness? I read most use 9.5mm which is easier to handle but I've also read 12.5mm is more rigid and easier to get it level with a straight edge. I thought maybe they use 9.5mm because it's cheaper but on the Tradepoint website they're the same price

fin · Post by **fin** » Wed Jun 01, 2022 5:02 pm

9.5mm if its those handi boards theyre horrible things. dead soft and bend easy. obv ya can get 9.5mm in the bigger 8x4 boards also. i assume the same in the 6x3 boards.

i personally would always go for the 12mm boards especially on dab. and id be going and making sure that plenty of dab is also used. nowt worse than the wall moving once you are finished.

also i was on a job a while back and the plasterer moaned about the dab sucking in as it set and pulling the boards in a bit. dunno how true that is or if he just could not lie straight in bed. some of the walls were a right pain once he was finished haha

Razor · Post by **Razor** » Wed Jun 01, 2022 5:30 pm

12.5mm everytime for me and maybe you should think about foaming them rather than traditional dot n dab.

It's super fast and much easier to get everything straight

fin · Post by **fin** » Wed Jun 01, 2022 6:12 pm

i remember seeing the foam in merchants a fair while back. but then it seemed to disappear.. dunno if it was just the particular merchants at the time ive not seen it on sale much since.

ill have to give it a try next time

Argyll · Post by **Argyll** » Wed Jun 01, 2022 6:41 pm

I looked at the foam before I posted this. I know Chez did a video on it a few years ago but I was sceptical about it.

Razor have you personally used it? if so which foam did you use? I've seen this and wondered if it's any good?

https://www.screwfix.com/p/no-nonsense- ... lsrc=aw.ds

It gets good reviews and I know SF don't remove bad reviews in case anyone comments on my past post.

Razor · Post by **Razor** » Wed Jun 01, 2022 6:47 pm

Argyll wrote: ↑Wed Jun 01, 2022 6:41 pm I looked at the foam before I posted this. I know Chez did a video on it a few years ago but I was sceptical about it.

Razor have you personally used it?

Yes, The only time I use board adhesive now is if I have to encase a gas pipe. It's so much quicker, cleaner and easier with foam although as with everything there is a learning curve

https://www.youtube.com/watch?v=5429guFsS_A

This guy is really good for plastering vids. This was his first time using foam after years of hating the thought

Argyll · Post by **Argyll** » Wed Jun 01, 2022 6:54 pm

The only thing about that video Razor is he's just attached a small piece of plasterboard, not a full sheet. However, I'm going to try it tomorrow and let you know how I get on.

I'm going to put a couple of screws in the bottom of the wall to support the board whilst it's drying.

fin · Post by **fin** » Wed Jun 01, 2022 11:20 pm

dunno if its possible but id maybe be having the board flat on the floor to make it easier to foam it up.

Argyll · Post by **Argyll** » Fri Jun 03, 2022 9:58 am

fin wrote: ↑Wed Jun 01, 2022 11:20 pm dunno if its possible but id maybe be having the board flat on the floor to make it easier to foam it up.

I went to my local B&Q in Cumbernauld but they didn't have any 12.5mm TE. The assistant told me the Stirling branch loads so I drove there which is a 40-mile round trip. It turns out she was looking at the moisture-resistant stuff which is double the price

. I then had to retrace my steps and go the other way to Coatbridge. I was fuming!

I spent all day driving around so didn't get much done. I opted against the no-nonsense stuff from SF and ordered the same stuff in Razors video he posted. It hasn't arrived yet.

I have them lying flat just now Fin and will spray them flat before attaching. I might wait for my son to come to mine to give me a hand. He's down in London doing some Jubillee parade pish.

fin · Post by **fin** » Fri Jun 03, 2022 3:39 pm

ahh are ya not skiming the wall then with using the taper edge boards

Argyll · Post by **Argyll** » Fri Jun 03, 2022 9:49 pm

fin wrote: ↑Fri Jun 03, 2022 3:39 pm ahh are ya not skiming the wall then with using the taper edge boards

Nah I plan on doing it the American way and filling the joints but if I make an arse of it I'll get it skimmed

fin · Post by **fin** » Sat Jun 04, 2022 1:21 pm

i always wondered why it was only the long edges with the taper. like when ya board ceilings ya gonna have joins on both long and short lenghts surely

Argyll · Post by **Argyll** » Sat Jun 04, 2022 3:47 pm

fin wrote: ↑Sat Jun 04, 2022 1:21 pm i always wondered why it was only the long edges with the taper. like when ya board ceilings ya gonna have joins on both long and short lenghts surely

I don't think TE is intended for ceilings but I'm no expert. Maybe you can get TE on all sides :dunno: