Steve, could the spring toggle set up also be used on wall hung bathroom basin, mounted to plasterboard wall or do you need to fit a noggin internally( because of the possible leverage)?
Cheers
A wall hung basin would need wood noggins to fix correctly and safely as does a boiler
You mention possible leverage and you also have the same problem with the rads,600mm nice height to perch on
The first thing that was said was customer not keen on wall cut out but if thats what needs doing to secure right,it is not for the customer to say this or that,if you listened to customers you would be in a right pickle,they probably do not even know how the wall is made and think the plaster board is the main wall and support
Once you have neatly cut two small strips out fitted batons and fixed rad,they will not even see,or stick a fix a section of 1/4" ply behind and fix brackets to that
A few years ago would maybe thought about fixed large rads to plaster board but no now,the quality of board if so poor now,the plaster is not so strong and the card covering can just peel off,I have fixed brackets to board and stuck bracket back to board for smaller rads and found just pull off and card covering just comes away like you were peeling paper sheet out of pad
If a customer does not want a baton behind a large rad,they do not know how weak plaster board is,take a bit with you and show them how easily it breaks,they soon change there mind
And when rad falling off wall they tend to forget they said they did not want batons and you do not have a spring toggle to stand on,plus a few big holes in the plaster board