Just about to start planning the interior insulation for my garden room walls. Studs are 4x2 (95mm). Would there be any kind of advantage to acoustic levels, if I was to put 50mm pir tight against the osb and then squash in 50mm of rockwool acoustic wool/slab, with plasterboard and skim on top of that. Working it out, it wouldn't cost much more than putting 90mm pir straight in. If there is no big effect on soundproofing, when adding the acoustic insulation, I may just go pir only
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Garden room walls, mix of pir and acoustic?
- Thread starter Wils81
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Go with full PIR.
You are better spending your time making sure the gaps are all filled with ex-foam etc. Quality of fitting will supersede all when it comes to noise and air leakage reduction.
100mm PIR will stand proud of the studs though and this can mean a hollow spot directly behind the plasterboard in line with the studs. A bead of adhesive foam (or polymer adhesive etc), strategically placed will help counter the hollow spots.
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Mmm, I'm not so sure; different materials absorb different frequencies and rigid board can be really good at sound transmission
It wouldn't take much to build experimental boxes for this and test it, and then you still have the materials you bought to make the boxes, for use in the walls so you're not really losing anything other than time
If sound is a particular concern try and find a way to have thicker walls and be meticulous with your detailing. Googling "robust details" may help too; I recall a lot of that site is dedicated to construction buildups for acoustic considerations
It wouldn't take much to build experimental boxes for this and test it, and then you still have the materials you bought to make the boxes, for use in the walls so you're not really losing anything other than time
If sound is a particular concern try and find a way to have thicker walls and be meticulous with your detailing. Googling "robust details" may help too; I recall a lot of that site is dedicated to construction buildups for acoustic considerations
Foam for heat, wool for sound, get the dense stuff.
You will also achieve higher soundproofing if you use 15mm soundblock plasterboard, it can be pricey so shop around for a deal.
Or just double up on regular 12.5mm plasterboard.
As nosey says, fill all gaps.
All this will be in vain if you have a teenage drumming Keith Moon wannabe on your hands.
Same if you have single glazed or draughty windows and doors.
You will also achieve higher soundproofing if you use 15mm soundblock plasterboard, it can be pricey so shop around for a deal.
Or just double up on regular 12.5mm plasterboard.
As nosey says, fill all gaps.
All this will be in vain if you have a teenage drumming Keith Moon wannabe on your hands.
Same if you have single glazed or draughty windows and doors.
Sorry, are you saying the 2 materials together will work or just go with what my main priority is, ie, sound or heat
It's hard to make that choice for you, we don't know what you will use the room for.
If it's a home office and you're sitting at a desk for hours, you might want to prioritise thermal performance.
If it's a home gym and you'll be leaping about doing aerobics in your leotard whilst blasting Olivia Newton John, then you don't need to be kept as warm.
Mixing the two types could go either way, the rigid boards transmit certain frequencies. If the studs are tightly filled with it, then you may compromise the effectiveness of the rockwool. Are you trying to keep sound in or out?
You could fill the void with rockwool and put your rigid boards over the studs, or use insulated plasterboard, as a compromise.
You could fill the void with rockwool and put your rigid boards over the studs, or use insulated plasterboard, as a compromise.
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