Wheel-arch - Sound-Deadening internally or externally?

[BreadvanMatt]

I did the Dynamat on the arches way before doing the foam on the arch liners. IMO the foam made the biggest improvement by far.
Two layers of 1.8mm will make a difference.

Hi DXX, Just resurecting this thread again. Just checking with you.
I am planning to put Dynamat on my rear arches on my Van. Did you put 2 layers of Dynamat Xtreme on the external arches? From this response, it seems that you did.

And are these the Dynmat Xtreme items you used?

DYNAMAT Xtreme Noise Reduction Sheet - Bulk - 457mm x 812mm - Pack Of 9 - DYN104 | eBay

DYNAMAT Xtreme Noise Reduction Sheet - Bulk - 457mm x 812mm - Pack Of 9 - DYN104 | Vehicle Parts & Accessories, In-Car Technology, GPS & Security, DIY for Speakers & Subwoofers | eBay!

www.ebay.ie

 

[BreadvanMatt]

Hi Folks, Just checking with anyone if they know if it is 1 layer of Dynamat Xtreme (1.7mm) that should be put on the external arches? Or is two layers as eluded by DXX above?
Or maybe it doesnt matter?

Thanks, Matt

 

[Texxaco]

Use silent coat externally under the plastic liner is how we do it and recommend View attachment 65374 View attachment 65376

And another job gets added to the list, cheers @BognorMotors

 

[BreadvanMatt]

And another job gets added to the list, cheers @BognorMotors

Thanks Texxaco. Appreciate the response. Last question. I see that the options are 2mm or 3mm thickness. I was going to go 3mm. But just wondering if it makes a difference (before I order it in bulk).
Thanks, Matt !

 

[Paulstewart20]

Hi, I have used the dodo mat Duo on the floor, I was planning on taking the wheel arch liner out to sound deaden the external wheel arch anyone know if this is a bad idea as it has foam top so I'm guessing that would soak up the water and rot? had to buy 2 rolls to cover the floor so leftovers I can use on the walls but it might be too thick for internal wheel arch to carpet after.

 

[Paulstewart20]

Ah it is waterproof but has anyone stuck it to the internal arches and carpeted and it looks good?

 

[t5explorer]

I have used Peacemat XR sheets to cover most of my inside van, also not sure if I need to cover external wheel arches, also planning using thermal liner called Glassmat as the second layer to reduce condensation. I am buying it from the local insulation company where I live, so will add/upload the photos after.