Release agent

[RogerS]

I need to put in a temporary woodem sleeve as something for the plasterer to work to. I then want to remove the sleeve and once the newly plastered area has been painted fit a Hit'n'Miss vent. But I can't think what to use on the outside surfaces of the sleeve so that the plaster won't adhere to it and I can remove the sleeve easily.

Any suggestions ? Wrap the sleeve in cling film ?

 

[Mike G]

......or parcel tape. Can I suggest you make the thing out of two pieces so that you can tease it apart at the join, rather than trying to hoik it out of the plaster all around. Plaster is pretty fragile.

 

[Cabinetman]

If it were thicker polythene you could use two layers, one comes out with the sleeve the other stays stuck to the plaster till you gently collapse it into the hole.

 

[duke]

Keep in mind that plaster will shrink with curing. So a single layer of parcel tape that Mike G mentioned should do it.
Maybe screw corner bracket to the inside of the form making it easy when you break down your form.

 

[wallace]

polystyrene?

 

[Eric the Viking]

In my experience parcel tape works, but Frog tape works better, although it's a lot more expensive. The other one is the black PVC tape that is used to join sheets of DPC material, it comes in wide rolls.

I had to cast a windowsill in situ a couple of years ago, before plastering in order to tile over that. Parcel tape wasn't bad but the DPC tape was the winner. That said, it's worth keeping it warm, so it comes off the roll well, otherwise it distorts with the pulling, and it's hard to get a clean flat surface.

... or you might just put a loose brick in there, measure where it is, from reference points, and let him/her just plaster over it. Cut it out with a grinder afterwards. Your plasterer will probably thank you, as it'll be much quicker, and possibly flatter also.

And every hit+miss vent I've found has been rather tacky: If it's on show, I got a nice louvred vent last time, painted to match the wall, and with an insect screen cut to fit behind from a PC grille or similar. Looks much neater. I'll post a pic, but we've got guests using the room at the moment. I think it was Ironmongery Direct, and it wasn't expensive.

 

[SamQ aka Ah! Q!]

The other one is the black PVC tape that is used to join sheets of DPC material, it comes in wide rolls.

Seconded. This method just works, Roger.

 

[spb]

That, and make it very slightly tapered. The last thing you want is for it to start sliding out and then the back corner to catch and rip a chunk out.

 

[RogerS]

.....

... or you might just put a loose brick in there, measure where it is, from reference points, and let him/her just plaster over it. Cut it out with a grinder afterwards. Your plasterer will probably thank you, as it'll be much quicker, and possibly flatter also.

...

That's a brilliant idea. I'll use a Kingspan offcut. Dead easy to remove.

 

[RogerS]

I should add that in another part of the house I was prepping a room for the plasterer. As a lifelong naturist, applying SBR to the ceiling was not one of my more finer moments. Or most sensible idea.

 

[Lons]

I should add that in another part of the house I was prepping a room for the plasterer. As a lifelong naturist, applying SBR to the ceiling was not one of my more finer moments. Or most sensible idea.

Good job it's a remote property Roger.

 

[Steve Maskery]

TMI, just TMI.
S

 

[SamQ aka Ah! Q!]

TMI, just TMI.
S