Insulation Under Carpeting

[n/a]

I am shortly going to be putting in new carpeting. Another poster on another site recommended using a product called Dynamat, which is like a butyl rubber self-adhesive sound barrier. This does not have a reflective coating on any side. Did the 280sl's after 1969 have any insulation under carpets, and is it better if I exchange the Dynamat I have for one that has a foil backing ?? Any ideas ?

[Richard Madison]

1971 280 SL has insulation under the carpet which is covered with thick silver foil. I think it was to give some protection from under-the-floor heat especially under the passenger seat which is right over the exhaust pipes. Don't know about Dynamat...
Richard M

[JamesL]

Mmm

I have managed to get hold of some Tri-Iso insulation (see http://www.commercialconnections.co.uk/18.html)

It's 25mm thick and used in housebuilding.

As my original sound/heat insulation under my carpets is shot, I am debating putting this stuff under the carpet.

It may make the footwell (for the driver....) a little cooler!

[hands_aus]

Hey Tosh,

Reading the web site shows the use as being in the walls and ceilings.

Do you think it will compress if under foot?

Bob Smith (Brisbane,Australia)
RHD,1967 early 250 SL, auto

[TR]

quote:Originally posted by SD280SL

I am shortly going to be putting in new carpeting. Another poster on another site recommended using a product called Dynamat, which is like a butyl rubber self-adhesive sound barrier. This does not have a reflective coating on any side. Did the 280sl's after 1969 have any insulation under carpets, and is it better if I exchange the Dynamat I have for one that has a foil backing ?? Any ideas ?

My car is at the interior shop now.  Plenty of Dynamat is being installed.  We are using Dynamat Extreme, which does have a strong reflective coating / foil backing on one side.

Also, my '71 280SL has the insulation under the carpets.

Tom in Boise

[Tom]

Dynamat that I used had a foil backing and said "Dynamat" on the foil side.  Rubber side goes down with foil exposed.

Best,

Tom


1971 280sl Tunis Beige Metallic (restored & enhanced)
1971 280sl Tobacco Brown (low mileage stock)
1970 280sl Deep Red (Project Car)

[signalred280sl]

In my 1970 280 SL I used Dynamat Extreme to cover floors in front, under seats, under trunk mat and inside of soft top storage. Cuts down on road noise. If used in soft top storage, you should remove the Dynamat logo, printing, etc. with lacquer thinner because the printing ink tends to transfer to the soft top where it touches and rubs on it. My top is light tan; if black, there probably would be no problem.

[JamesL]

It's used stapled between battens

It does compress down a little - and no doubt as a result loses some of it's insulation properties.

If I can work a way of getting my carpets out, I'll let you know how I get on with it as the original stuff is hardly wafer thin

quote:Originally posted by hands_aus

Hey Tosh,

Reading the web site shows the use as being in the walls and ceilings.

Do you think it will compress if under foot?

Bob Smith (Brisbane,Australia)
RHD,1967 early 250 SL, auto