How wide are partition walls?

A tradesman's quote details a partition wall to be 15 cm. Does that sound too wide to you? We don't want to waste space. A friend told us that that their partition was 3 inches wide. Help please! :-)

21 Answers

Fine touch building ltd
17 Reviews, 100% Positive
When building partition walls you should always Center timber studs 400mm apart to make sure walls are solid and strong.
7th May 2017
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SB Building Services
3 Reviews, 100% Positive
Timber stud and plasterboard internal walls are in 3x2 or 4x2 inch timberstuds and either 9mm or 12.5mm plasterboard the wall can be lined with plywood behind plaster board say for a bathroom or kitchen wall so any units wall cupboards or sanitary wares can be fixed solid and secure
15th Mar 2017
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The size of the wall depends on the timber used for the studs and noggin's plus the plasterboard and plaster. A partition wall could be around 3 inches wide as long as it is installed correctly.
4th May 2017
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The partition should be either 75mm wide using a 50mm stud or 95mm wide using a 70mm stud. EG 70mm stud plus 2x12.5mm plasterboards = 95mm (plastered would make it 100mm)
8th Mar 2017
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Rmc1solution
1 Reviews, 100% Positive
A partition wall can be a variety of sizes depending on the material that is used in its composition it can range from using 50 mm studs with 12 1/2 mm gyprock which is a 75 mm wall thickness up to a supporting wall of double bricks which would be anywhere up to 300 mm
5th Apr 2017
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hello partition wall u can choose what's size u want u can't make from 50mm to dabble wall
23rd Apr 2017
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OBPropertyServices
3 Reviews, 33% Positive
Yes 15cm is pretty deep, I would use 3x2 CLS timber with studs at 450mm or 600mm centred apart and noggins at 400mm centred. But this would all depend on the insulation level you require.
21st May 2017
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Sas building contractors
2 Reviews, 100% Positive
Hi, yes that is very wide he must be quoting for a 4 inch timber stud & 2 boards either side. You can have 3 inch which is 50mm stud with one board either side but I would suggest 68/70mm stud & 1 board either side & rockwool between.
10th Mar 2017
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CC Contractors
0 Reviews
If the partition isn't load bearing I.e. a simple dividing wall, then 15cm/150mm is unnecessarily wide. Finished wall thickness of 90-100mm is far more common. 63mm timber studs + 2 sides of plasterboard Inc plaster skim 30mm = 93mm.
21st Apr 2017
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SOLID INSTALLATIONS LIMITED
2 Reviews, 0% Positive
120mm is the usual width for a partition wall.
27th Apr 2017
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Beenrecommended
33 Reviews, 97% Positive
well normally 4" timber and then 2x12.5 mm plasterboard each side for fire regs
so 6 "is about right obviously take 1" off if only 1 layer of plaster board each side is required .
hope this helps
darren
22nd Apr 2017
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1st Building Solutions
2 Reviews, 100% Positive
It very much depends on the purpose of the wall. The thicker the wall the more insulation and sound proofing you can install which for alot of people is important.
21st May 2017
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Lms property services
4 Reviews, 50% Positive
There are no requirements for thickness in partition walls unless for split residential purposes. But i generally use 6x3 for the stud work then plasterboard either side. For the inch your looking to try save think about the quality and how the wall will be treadted as in a years time you dont want to find it being to flimsy for what you require
6th Jul 2017
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The Home Doctor
0 Reviews
Dont listen to friends unlesz they are in the building game as they will always just disagree when they dont know what they are talking about. Same with family. If they arent in the trade, they are probably using Google or just making it up. I get it a lot and just ask "are they in the trade?" 150 mm is bang on. 3 inches? Absolute nonsense.
18th Jul 2017
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Joinery & more
26 Reviews, 100% Positive
Studding wall are mostly 100mm in thickness comprising of 12.5 mm plaster board each side and 75mm timber studding hope this helps
23rd Jul 2017
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Total improvement
6 Reviews, 100% Positive
Hi there. A partition wall is made using 3"x2" timber stud work. On top of that there is plaster boards at 12.5mm either side of the stud work and then around 2mm-5mm of plaster either side, so the thickness of a finished partition wall will measure around 110mm
17th Jun 2017
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Pexx Bespoke Joinery
1 Reviews, 100% Positive
Hi
Depending on the make up of the partition it can be as narrow as 75mm- 12.5mm board on each side with a 50mm stud in between or standard are 12.5mm boards on each side with a 70 mm stud
21st Oct 2017
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Weaves Interiors & Outdoors
31 Reviews, 94% Positive
You can do both depending on the requirements to the room if it's structurally required or just simply parting a room up.

Depending on the room i.e kitchen may need the plaster board to be fire rated due to regulations which can be checked by your local planning office or architect.

Kind regards Dylan, Weaves Interiors
13th Aug 2017
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Nowadays fire safety would be very much taken into consideration. Because of this timber frame houses are built using c16 grade timber internally using 100x 50 + double skin plasterboard and 70mm kingspan type insulation.
13th Aug 2018
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Your tradesman's is right , especially if you want a sound proof.
11th Jan 2019
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Pipe Dreams Services Ltd
1 Reviews, 100% Positive
Usually they vary between 3" to 6" and the most common we use is 4" plus Plaster Board
31st Mar 2019
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