Stud wall an door lining confusion

[ccbunney]

Hi all,

So I went to B&Q recently to buy the timber and door lining for a new stud wall.
The guy there was very helpful and said the best timber to use was 63mm CLS and also recommended a 108mm door lining.

However, now I am a bit confused. By my calculations, the door lining will be too wide: 63mm stud + 2 x 12.5mm plasterboard + 3mm of plaster either side makes a total wall thickness of 94mm. This will surely leave the door lining protruding out by 7 mm either side.

Is that normal? They did not sell any door linings less than 108mm.

Am I doing something wrong? Or do people plane down the door linings to fit the stud? I imagined that they would be a standard size!

Thanks,
Chris

 

[gregers]

go to a proper merchants.but if you cant wait then either buy the proper sized studding or cut/plane the lining down.