Creating a new room - with PICS

[dizz]

I have a project to create a new room from an existing layout of a flat situated on the top floor of a building (layabout as three flats one on top of each other)

Here is a before and after of my plan.

Before :

Untitled

• dizz
• 3 Aug 2010
• 1

After :

Untitled

• dizz
• 3 Aug 2010
• 1

Hopefully, the plan tells most of the information. "A" is a structural wall, all of the other walls I will be removing/adjusting/creating will be partition walls.

Essentially, I hope to move the bathroom from one side of the structural wall to the other, taking up some of the existing kitchen space to create a new bathroom. The new bathroom will not have a window. The newly created room will be the new dining area/habitable room.

The question are as follows :

1. Can I use CLS 89mm x 33mm timber for all of the partition walls?
2. Can I use standard 12mm plasterboard for the kitchen and bathroom?
3. Is a single layer of plasterboard OK?
4. Would I need anything more than standard blanket insulation between the walls?

Ultimately, I aim to put in a Building Notice, once I understand a little more.

Thanks.

 

[dizz]

... hopefully, the water tank will end up in the loft above the wall "A" ...