Doesn't it matter that the hole through the plasterboard is bigger the the dyna/sleeved bolt? As in to put the copper tube through, or will the bolt hold straight anyway?Get some 120mm dyna bolts.
Drill hole through plaster board an into brick work.
Grab a piece of copper tube ( larger than the dyna bolt), push into wall until it hits the brick.
Measure tube to face of plaster and cut to length.
Insert dyna bolt into copper tube and hammer dyna bolt into brickwork and tighten up - presumably with rad bracket in place.
Done this for years and never had a problem.
Crappy brickwork - chemset allthread into brickwork, using copper sleeve as a spacer.
[automerge]1591047109[/automerge]
Good point, but the room was freeeeeeezing before!Is this a new radiator? If the room has been insulated you could use a smaller rad.