Blocking up doorway

Blues14

hi so I’m blocking up a doorway by doing stud and just wondering Iv ordered 12mm plasterboard so when I minus the thickness of the board which is 24mm for two sides I’d need a timber width of 108mm so the board will fit flush to the wall problem is can’t see timber online the width or do I just get as close as I can?any help would be appreciated.

mfceiling

4 inch timber is approximately 100mm. Each board will be 12.5mm so your finish will be 125mm. That leaves around 3.5mm either side which would normally allow for skim/plaster.

If you're not doing that then maybe get 2 sheets of 15mm plasterboard and the stud which will bring you to around 130mm.

Blues14

thanks for reply these are the boards iv ordered don’t think they come in 15mm

IMG_1897.jpeg

rob316

Actual size of 4x2 will be about 90mm in width.

Is the door way in an exsisting stud wall or block wall?

Blues14

it’s block work

mfceiling

https://www.boards.ie/discussion/comment/123181105#Comment_123181105

Probably best to put 2 layers of plasterboard on one side and one on the other.

90 + 37.5 = 127.5

OP's ope width is 132.

Leave it a couple of millimetres back to allow for a skim/plaster coat.

rob316

https://www.boards.ie/discussion/comment/123181106#Comment_123181106

4x2, 15mm board each side and that'll give you 3-4mm skim each side. Plasterer or yourself can always build it up

awec

If it's a permanent closure of the opening then would ye not just match the existing wall construction and use block?

Trying to use a different method is going make it hard to blend this in with the rest of the wall.

mickdw

4" block wall is likely 130mm finished.

4x2 and 12mm slab wont be a mile away.

Personally, if one side was to be hidden, Id line it flush on outside and just do the joints and have no real plastering.

Finishing both sides, you are just as well to get it skimmed. The slabs you have ordered will be perfect with 4x2 timber.

Blues14

thanks for the help went and ordered 4inch timber should be fine I’m using those acoustic timber slats on one side so as long as the other side sits flush should be fine