Filling in serving hatch

[jmshep]

I intend to fill in a small serving hatch (about 800x450) in a solid wall that is plastered. My thoughts are to fit a wooden frame and cover with plaster board each side.
My question is what depth should I leave for the plaster.
Any advice would be appreciated

Regards

 

[stevethespreader]

I intend to fill in a small serving hatch (about 800x450) in a solid wall that is plastered. My thoughts are to fit a wooden frame and cover with plaster board each side.
My question is what depth should I leave for the plaster.
Any advice would be appreciated

Regards

leave 10-11 mm for the undercoat and 2mm for the skim so a total of 12-13mm would be ok

 

[roughcaster]

Also,, remove 2 or 3 inches of old plaster, all around the perimeter of the hatch (on both sides), so you can scrim/tape the joints between the old brickwork and the new plasterboard,,,, you're tying in the new to the old, reducing the risk of cracking.

 

[stevethespreader]

i would just like to add ,11 mm is recomended for undercoat, but you can go a bit thinner if needs be

 

[roy c]

As the lads above say but you can bring your plaster board to about 3mm below the existing wall and hack the existing wall all around the edges back about 3 inches to the same level as the plaster board and before you skim unibond it making sure you over lap the joint by 2 inches either side and tape it and put a thin skim of plaster over it (use 4 inch scrim tape) and then skim it as normal (2 coats) over the whole lot and feather the joint in ...Jobs a good un!!

 

[troweladdict]

as the lads said before hen you have preped for the plastering you can mix bonding with muilti/board finish 50/50 mix then just hit it let it pall rule it off filling dips then trowle up sorted thats what i do it works for me

 

[Micilin]

as the lads said before hen you have preped for the plastering you can mix bonding with muilti/board finish 50/50 mix then just hit it let it pall rule it off filling dips then trowle up sorted thats what i do it works for me

Finish in the bonding reduces blistering too! I often use finish /bonding miixed. even a couple of handfuls of finish in a bucketful makes it nicer for skimming .

But why not build the infill so that the boards just need a 3mm skim, rather than having to bond and set?

 

[roy c]

as the lads said before hen you have preped for the plastering you can mix bonding with muilti/board finish 50/50 mix then just hit it let it pall rule it off filling dips then trowle up sorted thats what i do it works for me

Finish in the bonding reduces blistering too! I often use finish /bonding miixed. even a couple of handfuls of finish in a bucketful makes it nicer for skimming .

(But why not build the infill so that the boards just need a 3mm skim, rather than having to bond and set?)

What I said above mucka