Dot and Dab Alternative

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Sam9696

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Hi all,

Is anyone aware of any 'shallow' systems available which can be used instead of D&D?

Needing something that can provide around 25mm depth including the 12.5mm board. I have seen some metal shallow lining systems but never used any. Previous dots failed done by another plasterer.

It is a problematic background but the brickwork is flat but needing 25mm depth so thinking this may be the best option.

FYI, background is sand limes.
 
This might help

What centres are Gypframe GL1 Lining Channels, Gypframe GL2 Brackets, Gypframe GL9 Brackets, and Gypframe GL12 Brackets installed when fixing Gyproc plasterboard (GypLyner wall & GypLyner ceiling systems)?

For wall constructions the Gypframe GL1 Lining Channels are located at 600mm centres and Gypframe GL2 Brackets or Gypframe GL9 Brackets are located at 800mm centres (based upon not receiving ceramic tiles). For ceiling constructions the Gypframe GL1 Lining Channels are located at 450mm (for...
www.british-gypsum.com www.british-gypsum.com
 
Sam9696 said:
What mix for sand limes?

Can hard wall be used? Or will the mix need to contain lime due to the sand lime bricks? Originally It looks like it was sand cement and lime
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Best backing plaster is l*m*-g***n ultra, it’s lime based insulting plaster, topped with their duro top coat.
 
Tinytom said:
Thing of the past on new builds maybe but I do plenty on refurbs and heritage jobs
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would sand lime cement render be suitable for sand lime bricks? Thing is gypsum have said their products arent suitable due to long term adheision and differential movement.

Originally there was what looks like a sand lime cement render. Seems a bit far having to line the walls with metal which will then mean door linings/stair stringers all need packing out.
 
Sam9696 said:
would sand lime cement render be suitable for sand lime bricks? Thing is gypsum have said their products arent suitable due to long term adheision and differential movement.

Originally there was what looks like a sand lime cement render. Seems a bit far having to line the walls with metal which will then mean door linings/stair stringers all need packing out.
Click to expand...
Post some pics
 
Tinytom said:
Post some pics
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Dot and Dab Alternative
 
Topspread16 said:
Covering their neck letter by any chance?
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Seems that way but just because the dabs on the pic didn’t take to the brick either it’s just seems never ending trying to know what’s going to work or not. Originally looks like it was a sand cement lime mix
 
Sam9696 said:
1960s build. Bricks contain lime and all I keep getting told is that due to the lime, gypsum products will not work including dab adhesive.

Some say SBR some say grit some even say Gyp line
Click to expand...

it doesn’t matter if it’s lime or gold. What’s the wall construction
 
Sam9696 said:
Hi all,

Is anyone aware of any 'shallow' systems available which can be used instead of D&D?

Needing something that can provide around 25mm depth including the 12.5mm board. I have seen some metal shallow lining systems but never used any. Previous dots failed done by another plasterer.

It is a problematic background but the brickwork is flat but needing 25mm depth so thinking this may be the best option.

FYI, background is sand limes.
Click to expand...
 
Sam9696 said:
Is lime not needed in the mix because of the lime in the brick?
Click to expand...
I think your getting to hung up on the lime situation
If there’s cement and lime in the mortar then the lime is just used as a plasticiser, it’s not doing a deal to the mortar.
Yours just looks like sand and cement to me, how do you know there’s lime in it anyway?
It looks like cavity wall?
 
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