www.ultimatehandyman.co.uk

not sure what "wat" means. If there's more detail or references to lab data needed, just ask.

i nearly fell off my chair laughing.... mass law my ars3.

Python i think ted maybe a yank! after reading his post that how it comes across!!!! and they cant plaster over there!

OP; i asked about green glue some time ago..... please can you update this post after with your opinion on its soundproofing ability?

Ted White; please may i see lab data and also can you highlight the bits relevant to the OP? thanks

Ted White wrote:not sure what "wat" means. If there's more detail or references to lab data needed, just ask.

Ted, what data do you have to show that this won't work? There simply isn't the space for building out (~30mm to the window space) so I don't really have another option.

Would Green Glue have no damping effect? Is that not its explicit function?

I see quite a few posts. I thought I would have been alerted to new posts. Sorry for the delay.

The damping being discussed is known as constrained layer damping. It's essentially a sandwich of two layers of masswith a damping material in the center. As the wall is oscillated with a sound wave, the middle section of damping material is sheared. This shear force converts the kinetic movement of the wall into heat. You can Google all of this.

At any rate, damping is most efficient when the stiffness of the two halves of the sandwich are similar. Highly dis-similar stiffness materials don't create the shear force, therefore little damping. This is why you can't expect to directly damp a heavy masonry surface.

Regarding Mass Law, another well discussed principle you can Google at your leisure.