spxy1

Thanks for all the replies they are helpful already. Have not thought of Cellulose insulation will have a look into and see. Again not thought about mixed masonry and timber wall. I assume the masonry wall is on the outside?

Hi I'm new here and am looking at opinions as to best construction materials and type for a house that is soundproofed from outside noise. We don't need to deal with aircraft noise or very heavy traffic this is more for background noise such as music in gardens and parties as well as loud birds in early morning and the occasional modified exhaust at 4am.. We are starting a build within the next year and are sensitive to external noises and since we have the opportunity would love the chance to build in the most effective way to deal with it. Also we all play instruments and don't want to disturb anyone else. I know from a look online that fibrous type insulation is best at noise reduction as are a mixture on heavy materials ( block and concrete ) and possibly an air gap. I think this rules out using wooden construction with solid insulation. I believe a brick cavity wall with fibrous insulation should achieve around 3x the sound attenuation level as SIPSs panels, chat gpt is saying STC for sips 40-45 db reduction while brick cavity 50-55 db . I have questions though on the implementation and know poor installation could bugger thing up, leaving gaps and holes in block work or not sealing every thing correctly so have questions and what method is likely to actually achieve the desired noise reduction in a practical sense not just in theory. I believe windows would need to have expanding tapes seals for best soundproofing? Anyone done any thing like the and can provide experience and practical advise?