Lucid - the previous project was definitely on an internal plasterboard wall, the house is only 15 years old and the wall divides a bedroom from a bathroom. what's the right length of coach bolt? I'm guessing approx 18mm plasterboard plus fixing plus about 30mm into the wood? I've ordered a set of neodymium magnets - have to say they sound like something off Star Trek Otherwise stud screw as close as possible to the centre. Rsgaz - cheers, will almost certainly go that way with centre point fixed to stud, "almost certainly" because it depends if that will locate the TV where I want it. Plastic_peanut I have the Rawlplug ones already left over from the other project, are there any great advantages of the Gripfix ones? I think they'd both be pretty strong in themselves so the concern is more the stress they put on the plasterboard? Thanks guys - hopefully I've applied the "thanks" properly, I've been on this site before and hadn't realised it's a "thing" - always said it but not realised there's a button (not least because it doesn't show up until you hover over where it then appears!). It will help to ensure that you continue to receive advice. ![]() Be a good forum user and say thank you in the proper way. This is the proper way to show your thanks and respect for the time, experience and help someone gave to you when you were in need. You'll find that the Thanks button appears when you hover the mouse pointer near the Quote Multi-quote buttons. It takes a couple of seconds to do, and it costs you nothing. If this and other replies were helpful to you, then please do the decent thing and click the T-H-A-N-K-S button on all those the posts. Since there's no turning force with the setting tool then the fixing can't spin. The setting tool applies a pull force rather than the turning force of a drill or screwdriver. The teeth that are designed to bite in to the surface of the board become a drill. The reason for them chewing up the wall when not using the setting tool is that the fixing spins as the screwing force is applied to open the fixing. Sod's Law will catch up with you though and it will be on that on that crucial fixing point where you really need it to work 100% first time. You might get away with that a few times too. Hollow wall anchors work like an umbrella, and it's tempting to think that the simple action of tightening the centre bolt is enough to open and secure the fixing. " Why are my hollow wall anchors chewing up the wall?" - There's a very simple answer to that: You need the setting tool. I strongly recommend you make this small but very worthwhile investment. It will save you that time alone on the first fixing hole. ![]() This video is well worth the 12 minutes of your life it will take to watch. Rigifix and Corefix are two similar products that both use a piling method to fix in to the stronger block surface behind, and then transfer that strength through a rigid fixed core to the surface of the plasterboard so that very little pressure is put on the relatively weak board finish. ![]() Keep in mind though that any longer-screws or -bolts won't be able to penetrate the brickwork or blockwork behind without forcing the surface fixing out.īursting the surface in this way then means the additional complication to the job of a repair which is then likely to be weaker than the board it has replaced. You'll still be able to hollow wall anchors, Grip-It fixings and anything else that provides a shallow fixing. Where you can't find the stud with a stud finder, pilot holes or a magnet (because there are no nails with D 'n' D) then treat it as a dry-lining finish. (3) My stud finder is picking up studs, I could mount SOME screws in there without sticking on a piece of plywood / MDF which would presumably improve things? (2) Obviously there's loads of different brackets on the market other than this one, any recommendations? (1) Do you think the above solution would be suitable for my TV? I only want to use a fixed bracket, not one of those which sits way out of the wall and moves about In another project I used these to fix slot shelving to plasterboard (tried in vain to find studs using stud finder and drilling 2mm pilot holes at sensible distances apart!), repairing fix by previous house owner who used the "screw in" type which were coming out at the top (had to repair wall hence didn't care about pilot holes above!). The recommended bracket in the manual is this, though only seems to be available at this shop: I bought one of these, weight 16.1kg without stand:
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