fla 9 Posted February 17, 2022 2 hours ago, James. said: That helps a great deal thanks, and I think I’ve got my head around the products/terms and their uses now. After applying the MLV and CCF to the doors, would you apply the OCF to the door cards, rear quarter cards and Even the roof ? (Working on the theory that you’d keep the OCF inside the cabin as to reduce the possibility of it absorbing moisture). Apologies for the barrage of questions. No not at all James. Do excuse me if i'm going over things that you already know: essentially the constrained layer (dynamat, damplifier etc) stops panel vibration and looking from the outside in this is usually the first layer of soundproofing carried out. Contrary to opinion, it doesn't actually do much for road noise, which is mainly airborne noise or conducted through the chassis. What is then required is a decoupling layer (closed cell foam) and then a sound absorber (open cell foam) and finally a barrier (mass loaded vinyl) to block any noise. The problem in cars is the limited space under carpets, door panels and door skins. Putting them in another sequence wont be ideal - in my industry (Oil & gas) we use a similar setup on pipelines as acoustic insulation. You could apply the OCF above the MLV but usually it wont be as effective as having the MLV as the outermost layer. OCF is certainly a good idea in the roof if you can find the space there - its a bit tight with the sunroof but there is a square of foam there that could benefit from being upgraded with a newer product. I have also put some damplifier on the roof skin to reduce the drumming noise when it rains. By all means give me a bell if you want to bounce any ideas around. Like Dox, i'm sadly in my 50s now too, so road noise reduction is of more importance than before! Hasan Quote Share this post Link to post Share on other sites
1xshaunx1 27 Posted February 17, 2022 Turn the radio volume up 😂🤣 Quote Share this post Link to post Share on other sites
James. 9 Posted February 17, 2022 (edited) 2 hours ago, 1xshaunx1 said: Turn the radio volume up 😂🤣 That's the next job 😎 Thanks Hasan. you've been a great help already. My working theory is to apply the acoustic treatment whilst there's nothing inside the car. Get it Mot'd and drive it around to see what the noise is like as I'm adding layers. Adding the interior will hopefully be the icing on the cake. Many thanks for the advice. Probably best to buy some of the products I've been reading up on and see where it leads me. This company looks thorough if anyone else is thinking of attempting something similar: https://www.deadening.co.uk/pages/advice Edited February 17, 2022 by James. Quote Share this post Link to post Share on other sites
