Sound and Heat Interior Insulation for My 1981
10-23-2018, 11:49 AM
#1
Sound and Heat Interior Insulation for My 1981
I am weighing putting insulation under my stock carpeting throughout my interior.
Has anyone done this and which product do you feel is superior to others? Why?
Thanks for sharing your experience.
Has anyone done this and which product do you feel is superior to others? Why?
Thanks for sharing your experience.
10-23-2018, 03:56 PM
#2
I used Dyna Mat type stuff for the first layer. Then the foil on both sides insulation with about 3/8" of fiber material between the foil. Then new carpet. The Dyna Mat type stuff has a peal off backing and stick it to a clean floor. Then I glue the foil insulation to the Dyna mat type stuff. Then glue the carpet to the foil insulation. The glue helps the carpet follow the floor contours. I use the spray can 3M adhesive. I did my 71 front and back like this.
10-23-2018, 06:36 PM
#3
Burning Brakes
I agree with 71Vert.
The positive difference in NVH is stunning when done right (clean floor for the dynamat to properly adhere - no short cuts here). The foil /bubble insulation works in perfect tandem with the dynamat, and can be bought at Home Depot. I did not glue my carpet to the insulation in order to allow the carpet to breathe (humid here in Summer) but just fine-trimmed it so that it layed neatly. Plus, it settles to conform to even the subtle C3 floor contours after a couple of warm days.
As an aside, you will notice that your old carpet was the primary source of the old car smell. I don't mind that vintage car smell, but sure didn't miss it. Be sure to use a mildew/bacteria disinfectant on the exposed, painted floorboard when your carpet is out to clean out the remnants of 40 years worth of mildew/bacteria corpses
Good luck - you're obviously already on the right track.
Dave
The positive difference in NVH is stunning when done right (clean floor for the dynamat to properly adhere - no short cuts here). The foil /bubble insulation works in perfect tandem with the dynamat, and can be bought at Home Depot. I did not glue my carpet to the insulation in order to allow the carpet to breathe (humid here in Summer) but just fine-trimmed it so that it layed neatly. Plus, it settles to conform to even the subtle C3 floor contours after a couple of warm days.
As an aside, you will notice that your old carpet was the primary source of the old car smell. I don't mind that vintage car smell, but sure didn't miss it. Be sure to use a mildew/bacteria disinfectant on the exposed, painted floorboard when your carpet is out to clean out the remnants of 40 years worth of mildew/bacteria corpses
Good luck - you're obviously already on the right track.
Dave
10-24-2018, 09:23 AM
#4
Safety Car
Dynamat is the absolute best stuff for the job. It has a couple of disadvantages, though. It's very heavy, and it's pretty expensive.
As a "dynamat alternative," I've sometimes used stick on pipe/duct insulation, specifically Frost King FV516 which is a roll 12 inches wide and 15 feet long. It seems to work as well as dynamat for quieting and for heat insulation, and it's under $20 for 15 square feet on the roll. That compares to over $4/square foot for Dynamat when you buy it in quantity (36 square feet or so). The Frost King stuff is also significantly lighter in weight than the Dynamat. That could be an issue for a sports car.
As a "dynamat alternative," I've sometimes used stick on pipe/duct insulation, specifically Frost King FV516 which is a roll 12 inches wide and 15 feet long. It seems to work as well as dynamat for quieting and for heat insulation, and it's under $20 for 15 square feet on the roll. That compares to over $4/square foot for Dynamat when you buy it in quantity (36 square feet or so). The Frost King stuff is also significantly lighter in weight than the Dynamat. That could be an issue for a sports car.
Last edited by C6_Racer_X; 10-24-2018 at 10:16 AM.
