sb1202 Posted January 9 Share Posted January 9 Been looking at ways to reduce bridging on studs and wondered if anyone has tried this. 89mmx38mm studs with 12mm Jackoboard (insulated tile backer board) shims over studs and 100mm insulation between. I'm figuring that Jackoboard's insulation will break the bridge (to an extent) and since it can take screws and hold tiles etc, it will be plenty strong enough for plasterboard. A 1200x600 board costs around £10 and can make 15 shims so its not too much of an add on cost. Image gives an idea of what I'm thinking. Link to comment Share on other sites More sharing options...
Redbeard Posted January 9 Share Posted January 9 Hello. I think we need to know more about 'where these studs are' before we can comment much. What is on the other side? The outside world? Another heated room? An unheated room? You mention 'bridging' but not 'thermal bridging'. Is sound-proofing more the issue than 'thermals'? More details, please! Link to comment Share on other sites More sharing options...
sb1202 Posted Thursday at 21:12 Author Share Posted Thursday at 21:12 5 hours ago, Redbeard said: More details, please! Apologies - thermal bridge. Heated room, Stud wall, 70-100mm air gap to 600mm granite and rubble external wall. As per image Link to comment Share on other sites More sharing options...
torre Posted Friday at 08:22 Share Posted Friday at 08:22 I see where you're coming from but the strips can't be even slightly wide or they'll compromise tightly fitting the PIR which is difficult enough anyway. Then if they're a bit narrow any gaps will mean they're not doing much. Thermally, 75mm between then 25mm insulated plasterboard over would better reduce bridging and also mitigate any gaps where you've not fitted the PIR tightly between studs. If you do go the strips route I see there's a Jackodur board that's rigid XPS without the tilable face (that you don't need) Link to comment Share on other sites More sharing options...
ADLIan Posted Friday at 08:56 Share Posted Friday at 08:56 One of the insulation manufacturers (can’t remember which one) introduced a similar system, just with xps strips, quite few years ago. Was not a success and soon dropped! Link to comment Share on other sites More sharing options...
JohnMo Posted Friday at 09:24 Share Posted Friday at 09:24 I would Make the infill insulation thinner, so flush with stud. Then over sheet whole wall in a layer of PIR insulation and the plasterboard. You need to consider services (wires plumbing etc) what are doing with these? Can you loose more room space? If so replace between studs with dense mineral wool and 50mm PIR over studs. Link to comment Share on other sites More sharing options...
Redbeard Posted Friday at 09:25 Share Posted Friday at 09:25 It was Knauf, IIRC, and in fact the principle has, I believe, been 're-born' in SWIPS, which I have not seen, but I understand is an IWI system using 'insulated studs'. It is apparently used quite a lot in ECO4 -funded schemes. Link to comment Share on other sites More sharing options...
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