Should I fill in the holes first with something before trying corefix? I guess so since the corefix look like they need 10mm drillbits and I've drilled at the least the plasterboard with a 13mm?
Hi all - first time posting so hopefully this is the right place! I'm trying to drill some holes (just moved into new rental property) to mount our TV. I initially drilled smaller holes but realised there was plasterboard and then an air gap and then what appeared to be brick or mortar? I...