Williamz Posted July 17, 2021 Share Posted July 17, 2021 Hi all, New member here, and keen DIYer. I’m looking for help with my current project. I’m installing a shotgun safe - it will be bolted into solid wood floors, which has worked fine, but then I’m bolting the back of it to my wall. I assumed the wall was plasterboard, and bought GRIP-IT plasterboard fixings, which I’m very familiar with having used them on other walls. I drilled the 25mm hole, however, found the wall was 3cm thick, followed by a cavity (1 inch), followed by some insulation. I have never seen plasterboard this thick, and can’t find anything online about such thickness plasterboard. The material is chalky like plasterboard. As I thought it was plasterboard, I then bought the GRIP-IT undercutting tool to try and carve out a channel for the product’s “wings” as the wall was too deep for standard fixings, however, this hasn’t worked - the wings don’t have space to open! That’s the reason why in the photo attached appears to have a channel/void. Could anyone please advise: 1) what building material this is? 2) the strongest way I can bolt into it? Thank you in advance! William Link to comment Share on other sites More sharing options...
Marvin Posted July 17, 2021 Share Posted July 17, 2021 Is the wall an external one or a party wall one? Link to comment Share on other sites More sharing options...
Williamz Posted July 17, 2021 Author Share Posted July 17, 2021 It’s an internal wall between my apartment and the communal hallway, in a modern build. It seems to be the wall in the photo attached, cavity, insulation then another wall which goes onto the hallway. Link to comment Share on other sites More sharing options...
PeterW Posted July 17, 2021 Share Posted July 17, 2021 Looks like a hollow block - use a toggle bolt to get behind it into the cavity. Has you licencing officer told you that is ok as a location ..? Local one here wouldn’t pass that. Link to comment Share on other sites More sharing options...
markc Posted July 18, 2021 Share Posted July 18, 2021 Gun safe should be on an internal wall, if this backs onto a hallway or other communal area then it shouldn’t pass inspection Link to comment Share on other sites More sharing options...
Cpd Posted July 18, 2021 Share Posted July 18, 2021 7 hours ago, PeterW said: Has you licencing officer told you that is ok as a location ..? Local one here wouldn’t b pass that. No way that would pass by my local firearms officer, I thought it had to be bolted to a solid external wall. Link to comment Share on other sites More sharing options...
Roundtuit Posted July 18, 2021 Share Posted July 18, 2021 Double boarded plasterboard for sound insulation? As above, you really need something solid to fix to. Can you find a stud? I built-in some 6×2 noggins in a stud wall to coach-bolt to. I reckon it's as good as fixing to blockwork. Link to comment Share on other sites More sharing options...
tonyshouse Posted July 18, 2021 Share Posted July 18, 2021 What is behind the two layers of sheet material, masonry? Link to comment Share on other sites More sharing options...
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