-----Original Message-----
From: warthodson <warthodson at aol.com>
To: mayorrichard <mayorrichard at hotmail.com>
Sent: Sat, Jan 7, 2012 10:12 am
Subject: Re: [Healeys] Dynamat or similar products
Almost any product will reduce sound & heat some what, however in my opinion
no one product is best at doing both. Sound is generally treated with a dense
product. Heat generally requires a lot of small air spaces to retard
transmission (conduction) of heat & a reflective surface to reduce radiant
heat. Pathways (holes) must be plugged to reduce convection of heat. Generally
speaking, there is a limited space in which the materials can be installed.
I.E. On top of the floor board & under the carpet. How thick of insulation can
you tolerate? Personally, I choose to use the limited space for thermal
treatment & not sound. Dense materials like Dynamat are not very good thermal
barriers. Ever notice how hard it is to get certified thermal conductivity
information from any of the suppliers of this type of product? Also, thermally
speaking, what good does it do the put the reflective surface on the passanger
side of the insulation?
Gary Hodson
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