Retro fitting Acoustic Insulation?

[Temp]

How deep are your joists? Looks like 220mm are ok without sound insulation but 195mm might need it or am I reading the Hickman document wrong?

[jl9r]

I think 220mm

[ADLIan]

All

Approved Doc E covers detached houses - airborne sound (not impact) in intermediate floors and certain internal partition walls. The standards are not as onerous as those between flats or terraced properties.

The AD gives details that are deemed to satisfy the requirements in detached dwellings but only gives suggested construction details for flats & terraced houses (in this latter instance actual compliance must be shown by pre-completion testing or signing up to Robust Details Part E scheme.

 

Intermediate floors in dwellings normally incorporate 100mm of mineral wool quilt with min. density of 10 kg/m³ - note denser will necessarily be better! Some of the engineered joist manufacturers have products/details that omit the mineral wool but follow the MIs to the letter and ask for the test report to prove it.

[jl9r]

 

AldIan, what you say sounds like sense, just because the i-beam joist manufacturer says they comply, doesn't mean, in the site installation it will. And even if it does, they surely have to prove compliance by performing Pre-Complesion testing as per part E regs.

The Hickman document I attached was dated 2006 so is that even still valid, cos sure as hell they will have cut some costs somewhere or changed supplier.

[MJNewton]

38 minutes ago, jl9r said:

 

AldIan, what you say sounds like sense, just because the i-beam joist manufacturer says they comply, doesn't mean, in the site installation it will. And even if it does, they surely have to prove compliance by performing Pre-Complesion testing as per part E regs.

 

I doubt you'd be able to prove acoustic performance - it is a highly specialist and complex subject, and I imagine almost impossible to properly demonstrate outside a laboratory environment. That's why manufacturers commision independent testing of their product such that, if installed in accordance with the method tested and prescribed, should be sufficient for BC acceptance. 

Edited July 30, 2020 by MJNewton

[ADLIan]

The acoustic performance of intermediate floors and partition walls is arrived at by laboratory testing. If you chose not to follow the deemed to satisfy option in AD E then the manufacturer of the floor joist (in this case) should have a lab test & report (see App B of AD E) to prove their system complies with the Regs.

 

The Hickman report does not appear to be to the correct BS. Hickman may have other test reports however in support of the above document.