john-e89 said:
Might be worth noting that you can get different thicknesses of proofing depending on the application. If you're doing the door skin itself, you can use the thickest available whereas doing the door panel that houses the door card you'll need some thinner proofing. Likewise doing the floor pan or boot lining for eg, would use thickest then move to thinner where interior panels are situated. Dynamat is very good but is expensive. From memory Perry's write up was very good and well worth a read.
Thanks John - I've read Perry's write up and have bought some silent coat - gone with just 2mm and will double up, as per his suggestions at the end. Only doing the doors initially - not sure of the benefits of the floor or boot, given the roof is open most of the time! Just want the doors to stop sounding like a tin can over actual sound reduction.