The other way is to remove railing, fix a piece of dressed timber on top of the plasterboard securely into studs then fix railing to this. Saves you opening up wall for blocking and the dressed timber covers up holes that would have needed to be patched.
bitchprophet t1_irdww7k wrote
Reply to Foam/paste that can be injected into a hole and when it hardens, it's as strong as hardwood? by flying-benedictus
The other way is to remove railing, fix a piece of dressed timber on top of the plasterboard securely into studs then fix railing to this. Saves you opening up wall for blocking and the dressed timber covers up holes that would have needed to be patched.