Vijay Posted December 23, 2016 Share Posted December 23, 2016 I have a mix of concrete and stud internal walls, the concrete being load bearing. They're 100mm wide but the question of changing them to 140mm has come up and I thought I'd ask if anyone would bother? Would it make in easier with chasing wiring, light switch and plug boxes? Cheers Vijay Link to comment Share on other sites More sharing options...
Brickie Posted December 23, 2016 Share Posted December 23, 2016 Easier in what way? Are you having dot & dab plasterboard on your internals? if so,no chasing out required (afaik). Link to comment Share on other sites More sharing options...
Onoff Posted December 23, 2016 Share Posted December 23, 2016 31 minutes ago, Brickie said: Easier in what way? Are you having dot & dab plasterboard on your internals? if so,no chasing out required (afaik). A bitch when you come to rewire though unless you do the drops in conduit! Link to comment Share on other sites More sharing options...
Declan52 Posted December 23, 2016 Share Posted December 23, 2016 When you say load bearing what do you mean?? For a roof 100mm blockwork is fine but if it's concrete slab first floor then it's better to go for 150mm or even 215mm. Link to comment Share on other sites More sharing options...
ProDave Posted December 23, 2016 Share Posted December 23, 2016 Why not stick with 100mm block, and screw 25mm by 50mm vertical battens to make a service void and fix plasterboard to the battens. Best of both words. Link to comment Share on other sites More sharing options...
Vijay Posted December 23, 2016 Author Share Posted December 23, 2016 4 hours ago, Declan52 said: When you say load bearing what do you mean?? For a roof 100mm blockwork is fine but if it's concrete slab first floor then it's better to go for 150mm or even 215mm. Load bearing as it'll support floor joists and the attic trusses. It's not a concrete slab, I'm having B&B floor downstairs Link to comment Share on other sites More sharing options...
Vijay Posted December 23, 2016 Author Share Posted December 23, 2016 3 hours ago, ProDave said: Why not stick with 100mm block, and screw 25mm by 50mm vertical battens to make a service void and fix plasterboard to the battens. Best of both words. Nice idea. I was just trying to keep work down as I'll have so much to do Link to comment Share on other sites More sharing options...
Declan52 Posted December 23, 2016 Share Posted December 23, 2016 18 minutes ago, Vijay said: Load bearing as it'll support floor joists and the attic trusses. It's not a concrete slab, I'm having B&B floor downstairs By going wider it will help your u values slightly. You will also get deeper reveals at your windows if you like that look. As far as chasing conduits out 100mm walls are fine. Link to comment Share on other sites More sharing options...
Vijay Posted December 23, 2016 Author Share Posted December 23, 2016 These are just for internal walls, the external walls are ICF Link to comment Share on other sites More sharing options...
ProDave Posted December 23, 2016 Share Posted December 23, 2016 51 minutes ago, Vijay said: Nice idea. I was just trying to keep work down as I'll have so much to do Speaking as an electrician, now used to working mostly on timber framed buildings, I now HATE chasing brick or block walls for cables and thankfully I don't have to do it often. For that reason, I would do as I suggested a few posts back. It is SO much easier to make alterations at a later date. Link to comment Share on other sites More sharing options...
Vijay Posted December 23, 2016 Author Share Posted December 23, 2016 Definitely gonna listen to your advice Dave and will do that if there's no benefits to 140mm over 100mm wide block work/internal walls Link to comment Share on other sites More sharing options...
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