I wanted to get your opinion on whether I should spray rubberized undercoating on the floor then laying dynamat on top of that or just putting the dynamat down without the coating. I would like my truck to be as quiet as possible inside.

 

If you want quiet then do a undercoating spray that is supposed to deaden sound. Made a good amount of help in my truck after I sprayed the cab down.

 

If your truck is not equipped, you should get the sound deadening package from another truck.

It comes with sound insulation for the firewall, and floor, and the inside of the doors are coated with rubber sound deadener as well.

My truck is factory equipped, and it's extremely quiet.

My truck was also undercoated with a black rubberized coating at the dealer, which now after 30 years is starting to flake off. so be careful if you use it for that reason.

 

You'll be hard pressed to out perform the Dynamat with that rubberized coating. But, the Dynamat stuff is freak'in expensive. I used something very similar to Dynamat, suppose to be every bit as good, but the name eludes me now. You can google Dynamat Alternatives and find it, though.

 

try to find a diesel truck at the JY. My 86 w the diesel is quiet as can be

 

so go ahead and do both?

Ive been saving up since for dynamat but will undercoating by itself do the job?

What do I look for when looking at the trucks with sound deading packages?

 

There's no way I would cough up all that cash for Dynamat. Have you looked at Peel & Seal? http://mobilehomepartsstore.com/Merc...ct_Code=540122 This stuff is reasonably priced and designed for harsh outdoor environments. For the cost of a few sq ft of Dynamat you can do the whole cab!

If heat is an issue, you can add the stick-down Frost King Foil Duct Insulation from Lowes for an additional 15 bucks... http://www.lowes.com/lowes/lkn?actio...il=&lpage=none

Of course you will want to do a thorough cleaning and rust abatement prior to using these products on your floor pan. This is what I plan on doing with my truck when I get to that part of the project.

 

summit racing's house brand of sound deadener. its the peel n stick stuff made out of a tar like substance. i doubled up on my doors, the outter skin and the inner skin, and the left overs i put behind the seat. Doors sound solid, and the truck is purdy quiet without even touching the floor. For the price, i did the two doors for the price of one dynamat roll. If it dries up and breaks off im not gonna lose sleep. my 2 cents

 

The easiest way is to look at the firewall under the dash above the mat or carpet. It will be covered with an 1" thick sound proofing material, with a black rubberized layer on top. Trucks without the sound deadening package the firewall is uncovered and bare.

There will be a thin sound proofing layer as well as moulded cork insulation under the floor mat or carpet as well.

There is more to it, but those are the simple things to see.

 

I used a product called second skin, which is much cheaper then Dynamat and is every bit the quality. It really made a difference in the sound deadening of my 86 F150 4x4. I'll be using it in the restoration process of my 69 Mustang too.

 

try fatmat

 

Agreed, really good stuff for the price...

 

Go here:

https://www.ford-trucks.com/forums/8...b-edition.html

Em did a real good job insulating the inside of her cab ... when last I heard she was looking for a way to get expanding foam into the overhead (head liner?) of the cab.

She posted a bunch of tips and pictures.

BE CAREFUL ... a lot of these methods can trap moisture ...

We got enough problems ... we don't need to be givin' them Rot Demons a place to live.

 

yeah I saw heard thread em posted, it was very inspiring. I was debating about doing what she did but I saw FatMat on ebay for $170 for 100 sq ft. Or I can get Dynamat for wholesale price. Ill probably just end up buying the fatmat and insulate everything (i.e. roof, doors, floor, firewall) but it'll have to wait another month since I got side-swipped today either way ima post up pics of the tear down, rubberized undercoating and insulation