Sound insulation, Halyard/Quietlife/Vetus

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mflynn1971

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27 Feb 2005
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Hi
I'm looking to get good quality sound insulation for new engine install. Have heard good things about the Halyard product. Anyone know how the Quietlife stuff from ASAP or the Vetus type compare. Local quote I got for Halyard stuff was nearly twice ASAP web prices for similar speced product. Would like to fit 32 mm type with 5 kg /m lead sheet inside.

Mike
 
I used the Quitelife soundproofing with the lead barrier from ASAP and was more than happy with it. I initially mounted it using spray on glue and while this was good enough for the vertical sections, after a while the horizontal sections started to sag under the weight of the lead and I re-fixed it all using plastic buttons and screws. Not too difficult to cut to shape using a craft knife, but the spray on glue can be very messy to work with.
 
Can't speak about the others, i used the halyard. Having used self-adesive and not sellf adhesive i wd go self-adhesive every time. But the (self) adhesive (or any adhesive imho) is not strong enough to hold the 32mm with interlayer on a ceiling - they will come down over time. Use some sort of positive fixing where you attachs a strap to the ceiling first and punch a hole thru the foam, then attach retaining device.

A better idea might be to make a (not too heavyweight) ceiling frame screwed to ceiling,then plop the self-adhesive insulation in the framed areas and then screw down (er up) the final cross-members to the frame - nice and neat edges and won't come down unless you want it too AND you can attach lights etc too if needed.

Sh*t! This is a good idea - which i'd done this...
 
If you want to try something cheap line the inside of engine box with egg tray's the cone shapes reduce the noise very effectively
 
I also used the 45mm double layer type Quietlife from ASAP, but I did secure it all with the palstic buttons, also supplied by ASAP. Also used the aerosol spray to secure it but as said earlier, it's messy and gets everywhere. The ceiling I also used battens to prevent it falling off. Seems very effective but have no experience of any other make. One point I didn't consider that the extra insulation makes the engine hatch heavy!
 
I did a fair bit with noise suppression at work a long time ago. At least as important than the actual lab perfomance of the gear was the fitting - every last little bit matters.

The other factor is thatthe noise does reduce and reduce with more and more layers, up to about 7 inches thick.
 
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