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Back box in dry wall
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<blockquote data-quote="Mark2spark" data-source="post: 70605" data-attributes="member: 220"><p>I'll also confirm the corrugated cardboard is called a paramount wall. I use stout fence wire to push though it if wiring new.</p><p></p><p>The OP's wall sounds like what we call 'plasterboard sandwich'. The correct term is 'laminated partition'. Basically a frame of batten is made around the ceiling, wall, &amp; floor, no middle bits like a stud wall, one side is then tacked around the perimeter, then a really thick type of plasterboard is stuck on the inside of the tacked board, they didn't have dry wall adhesive in those days so used thistle plaster instead to stick with. This thick plasterboard is called 'planking'. As it's about an inch thick it's really heavy so it's only about 600mm wide. The wall is finshed off with a top sheet of plasterboard tacked on the remaining surface, but with a few dabs of sticky on the planking as well.</p><p></p><p>Getting a back box in is tricky, so is converting a single to a double. I use a 25mm wood auger bit to drill out the planking deep enough to get a regular 25mm deep metal box in, a few squirts of gripfill on the back of the metal box holds it in place long enough just about.</p></blockquote><p></p>
[QUOTE="Mark2spark, post: 70605, member: 220"] I'll also confirm the corrugated cardboard is called a paramount wall. I use stout fence wire to push though it if wiring new. The OP's wall sounds like what we call 'plasterboard sandwich'. The correct term is 'laminated partition'. Basically a frame of batten is made around the ceiling, wall, & floor, no middle bits like a stud wall, one side is then tacked around the perimeter, then a really thick type of plasterboard is stuck on the inside of the tacked board, they didn't have dry wall adhesive in those days so used thistle plaster instead to stick with. This thick plasterboard is called 'planking'. As it's about an inch thick it's really heavy so it's only about 600mm wide. The wall is finshed off with a top sheet of plasterboard tacked on the remaining surface, but with a few dabs of sticky on the planking as well. Getting a back box in is tricky, so is converting a single to a double. I use a 25mm wood auger bit to drill out the planking deep enough to get a regular 25mm deep metal box in, a few squirts of gripfill on the back of the metal box holds it in place long enough just about. [/QUOTE]
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Back box in dry wall
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