Thermaboard and a big radiator

[Flora]

I've had thermaboard put on the external walls in a couple of rooms, now need to fit new radiators. The 2 new little radiators upstairs feel pretty solid fitted with hollow wall anchors. Question is, will the 600x1000mm rad for the front room be ok on hollow wall anchors or will it trash the plasterboard? I've looked at all sorts of fixings and can't find any long enough to go through 55mm of insulation to reach the brick. Don't think cutting a window in my nice new wall for noggins is a very appealing idea either...!

 

[SJB060685]

In my house fed by an air source heat pump, which naturally require larger radiators, i have the rads on plaster board wall mounted on feet. The rad brackets mount to plasterboard positioning it and the feet take the brunt of the weight

 

[Murdoch]

Have you tried Gripit fixings?

they are pretty good in my experience

 

[Gasmk1]

These are what you need Best Dot and Dab Cavity Wall Fixings | Hollow Wall Fixings - https://www.corefixed.com/?gclid=CjwKCAjwiMj2BRBFEiwAYfTbCm0AzAu3zujbsdcOS0Kg-Mi3co7KnwKJkU7EaHvrOIQGC_tGCuKe5hoCG84QAvD_BwE

 

[Flora]

These are what you need Best Dot and Dab Cavity Wall Fixings | Hollow Wall Fixings - https://www.corefixed.com/?gclid=CjwKCAjwiMj2BRBFEiwAYfTbCm0AzAu3zujbsdcOS0Kg-Mi3co7KnwKJkU7EaHvrOIQGC_tGCuKe5hoCG84QAvD_Bw

I've had a look at corefix, but it says only suitable for a voice up to 25mm, I've got 55+

 

[ShaunCorbs]

I use a normal plug and screw around 4-5” long depending on cavity and a brown plug

but to span the gap I use a bit of Galv 20mm conduit (Electrical) eg sized so it touches the brick and flush with the plaster

 

[Gasmk1]

I've had a look at corefix, but it says only suitable for a voice up to 25mm, I've got 55+

you will have to make up something similar yourself then as the post before says but personally I would go for screwed rod and bond it in with epoxy resin or go for rads with feet like old cast style

 

[oz-plumber]

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.

 

[malx42]

I've had thermaboard put on the external walls in a couple of rooms, now need to fit new radiators. The 2 new little radiators upstairs feel pretty solid fitted with hollow wall anchors. Question is, will the 600x1000mm rad for the front room be ok on hollow wall anchors or will it trash the plasterboard? I've looked at all sorts of fixings and can't find any long enough to go through 55mm of insulation to reach the brick. Don't think cutting a window in my nice new wall for noggins is a very appealing idea either...!

Is this a new radiator? If the room has been insulated you could use a smaller rad.